Yet Another Cat Food Guide

Renafood Redux, or: The Reply Comment that Ate the Blog

Candy — Wed, 03 Mar 2010 00:47:24 +0000

Given the relative obscurity of this cat blog and the fact that I update it once every never, I was really surprised to see a notification pop in my e-mail that somebody had left a comment on my Renafood post. A very long comment. From a vet working for Standard Process, the manufacturer of Renafood. I started replying to the comment, and suddenly realized that I’d written more than 1,300 words of reply. So: time for a new blog post! One about substantive issues, even, instead of pictures of fluffy kittens. I’m going to quote him verbatim in this post, so don’t feel like you need to run over to my Renafood post to read everything he wrote.

Dr. Cameron wrote:

I have been a practicing veterinarian since 1982, and I have used Standard Process supplements in animals (and my own family) for the past 20 years. I am now employed by Standard Process as a technical support veterinarian. I help veterinarians integrate nutrition into their clinical practices. I would like to respond to this post.

The author of the above post expresses skepticism on the value of using herbs, botanicals (plants) and glandular materials to support compromised organs (in this case, his/her cat’s kidneys). He/she lists multiple points of concern.

1. The author does questions the quality control of the ingredients in Renafood (or supplements in general). I would invite him to view a video of how supplements are made at Standard Process on our website (www.standardprocess.com). Standard Process Inc. produces all supplements under the same stringent regulations used in the manufacture of pharmaceuticals. We are inspected by the FDA, USDA and other regulatory organizations multiple times per year. Each supplement we produce is tested by our in-house laboratory up to six times before it is released to the public. Quality control is taken very seriously at Standard Process Inc.

My response:
Thank you for taking the time to respond to my post. Regarding the quality of your supplements: since I’m unable to inspect your factory, and given that you’re an interested party, I’ll take your word that your products do, in fact, contain what they do, unlike the majority of companies (who also make substantially similar claims regarding quality control).

Dr. Cameron wrote:

2. You don’t believe that herbal detoxification is possible. I would be happy to provide you with references of how herbs and foods can affect detoxification mechanisms in the body. After 28 years of practice and years of clinical experience with these products, I can attest to their value. The FDA does not allow supplement companies to make any claims on their products in relation to specific diseases, so will not be doing so. The fact is that most chronic disease have been linked to nutritional deficiencies, so providing quality nutrition to compromised cells can improve their ability to function.

My response:
If you are willing to point me to some peer-reviewed literature regarding a) the biochemistry behind herbal detoxification and b) the actual efficacy of herbal detoxification, I’d love to read it. I’ve tried for years, and the lack of good evidence eventually led me to my skeptical stance today. I would also like to point out that this statement:

The fact is that most chronic disease have been linked to nutritional deficiencies, so providing quality nutrition to compromised cells can improve their ability to function.

Has nothing to do with detoxification; malnutrition is separate and different from detox. Somebody suffering from scurvy needs vitamin C, not an herbal cleanse devoid of vitamin C. Furthermore, while accepting the relatively uncontroversial assertion that some chronic diseases are linked to nutritional deficiencies or other bad dietary practices, it doesn’t necessarily follow that taking commercial vitamin or glandular supplements will cure or correct the conditions. (Diabetes mellitus comes to mind; so do certain types of liver cirrhosis and gout.)

Dr. Cameron wrote:

3. Cell determinants. As I mentioned, we are severely restricted by the FDA as to what we can say about our ingredients, so the information is vague and difficult to get a clear picture.

My response:
I would first like to begin by disagreeing that the FDA restricts what you can say about how your ingredients work. The FDA regulates the health and structure/function claims a supplement company can make about its products, i.e., what the products’ health benefits are. As far as I know, there is no law or regulation that restricts the dissemination of truthful scientific information explaining the biological or chemical pathways in which particular compounds work. Most of the most stringent regulations directly relate to labels in particular; as far as I know, detailed information sheets aren’t “labels”. In fact, please refer to Section 403B of the Federal Food, Drug and Cosmetic Act:

(a) IN GENERAL.—A publication, including an article, a chapter in a book, or an official abstract of a peer-reviewed scientific publication that appears in an article and was prepared by the author or the editors of the publication, which is reprinted in its entirety, shall not be defined as labeling when used in connection with the sale of a dietary supplement to consumers when it—
(1) is not false or misleading;
(2) does not promote a particular manufacturer or brand of a dietary supplement;
(3) is displayed or presented, or is displayed or presented with other such items on the same subject matter, so as to present a balanced view of the available scientific information on a dietary supplement;
(4) if displayed in an establishment, is physically separate from the dietary supplements; and
(5) does not have appended to it any information by sticker or any other method.

(b) APPLICATION.—Subsection (a) shall not apply to or restrict a retailer or wholesaler of dietary supplements in any way whatsoever in the sale of books or other publications as a part of the business of such retailer or wholesaler.

Dr. Cameron wrote:

For more information on how protomorphogens, cell determinants, or glandular tissues can be of therapeutic value, look at the more recent subject of Oral Tolerance Therapy. OTT is touted as a ‘new and promising’ therapy for a number of diseases, using cell extracts from various glands to treat specific glandular diseases. This can help explain how eating some kidney can help a compromised kidney. This is what the catalog is talking about when supplying cell determinants.

My response:
From a quick check, Oral Tolerance Therapy seems to be a therapy related to autoimmune diseases, especially T-cell mediated disorders. To grossly oversimplify: the idea is to feed somebody with an autoimmune disorder (say, irritable bowel disease or rheumatoid arthritis) extracts from the relevant tissues to help reduce the immune system’s hyperresponsiveness and therefore reduce the attendant inflammation. However, even if it were proven to work consistently (and I think the science is still kind of uncertain on that), and assuming for the moment that protomorphogens work in the same way OTT does, most incidences of chronic feline kidney disease, as far as I know, are not due to autoimmune disorders. For example: my cat Eric’s polycystic kidney disease in particular had nothing to do with his immune system and everything to do with the fact that he’d inherited an autosomal dominant gene from one of his parents for PKD. The majority of feline kidney disease is, as far as I know, idiopathic. Additionally, the mechanism by which Oral Tolerance Therapy works also seems completely different from what is suggested in the Standard Process literature about protomorphogens. OTT works by desensitizing the immune system so it doesn’t attack the body’s own tissues. I can’t speak on how protomorphogens work, since the information sheet was confusing and opaque, but the sheet seems to claim that protomorphogens affect cell division directly, and to target specific cells or tissues in specific organs. If I’m wrong about this, I’m certainly open to being shown where and how.

Dr. Cameron wrote:

Your not understanding what cell determinants are does not qualify you to say they do not exist or cannot be of clinical value. But I will agree that the writing could be more precise.

My response:
If I’m wrong about this, then I’d love to be educated on the fact—in fact, I would love to have a primer on just exactly what protomorphogens are and how they work. I’ve sent a copy of the Standard Process fact sheet to biochemist friends of mine, and they’ve come right out and said that the “mineral template” idea is nonsensical and not how cell determinants work; they also pointed out that substances that could have the sort of dramatic effect on cells claimed by Standard Process would be along the lines of hormones, mutagens and teratogens, and almost definitely not qualify as a mere supplement—it would be regulated as a drug by the FDA. It doesn’t help that “protomorphogen” seems to be a trademarked term of art, so searching science journal databases doesn’t turn up anything, and Googling merely turns up information sheets and promotional materials written by Standard Process or by sites selling Standard Process supplements.

Dr. Cameron wrote:

4. Dr. Royal Lee spent his life fighting the FDA, and yes, he was brought up before them several times. He was an outspoken critic of the adulteration of foods that came into common practice starting in the 1920’s (bleaching of flour, high-heat processing of foods, processing of foods to increase shelf life, the addition of sugar to so many foods, etc.) He constantly wrote letters to the FDA and other industry leaders pointing out the negative health effects these foods were having. As a dentist, he saw oral pathology due to nutritional deficiencies. This is how he came to start Standard Process Inc. – using quality food sources to replace the trace nutrients that were being lost in the food supply. The FDA and others took offense at his criticism and did go after him. Some of his claims (back in the 1930’s and 1940’s) were that these processed foods would lead to increased obesity, heart disease, cancer and diabetes. Are we seeing any of these conditions today? Are they increasing in frequency? Do we eat a lot of processed foods? Do our animals? As veterinarians, we are seeing the same increase in the same diseases in our pets as in humans. Be sure you check other sources besides QuackBusters.

My response:
I think it’s misleading to imply that Dr. Lee was prosecuted because he spoke out against processed foods and refined sugars. He made specific health and medical claims about his supplements and the FDA cracked down on him, and their statements about Dr. Lee being the “largest publisher of unreliable and false nutritional information in the world” concern the false medical claims on his products. Whether or not he’d drawn attention by speaking out against refined foods and existing food processing methods is beside the point; he was guilty of medical fraud because of the various claims he made regarding the efficacy of his supplements for treating various acute and chronic diseases and disorders. If you’re looking for a source beyond Quackwatch, perhaps this particular Notice of Judgment from the FDA regarding Dr. Lee’s products will be more satisfactory. (This is merely the first I found of many; if you go to the Notices of Judgment archive and search for “Royal Lee,” many more hits come up.) Here are the diseases that Dr. Lee claimed various supplements cured, which I’ve excerpted from the bottom of page 2 and on through page 3 of the Notice:

(1) pneumonia, tuberculosis, influenza, colds, whooping cough, measles, and mumps

(2) puerperal sepsis, infection of ear, infections of genito-urinary tract, infections of mucous tract, infections of gastro-intestinal tract, infection of respiratory tract, infections of sinuses, focal infections, and infectious diseases

(3) high blood pressure, low blood pressure, overweight, and underweight

(4) arteriosclerosis, high blood pressure, aortic aneurism, aortic insufficiency, valve leakage, coronary occlusion, coronary thrombosis, or dementia

(5) arthritis, hemorrhagic conditions of the urine, albuminuria, heart disorders, menstrual and ovarian disorders, Bright’s disease, leg ulcers, anemia, wasting of muscles, paralysis, muscular weakness, chronic diseases, amenorrhea, colitis, cystitis, children’s diseases, women’s diseases, liver disorders, dysmenorrhea, eczema, gall-bladder disease, gastritis, eye disorders, and cardiovascular disturbances

(6) acne, acute or chronic alcoholism, angina pectoris, Addison’s disease, adrenal hypertrophy, agranulocytosis, apoplectic sequellae, atrophy of glands or muscles, achlorhydric anemias, backward children, burns, cataracts, chlorosis, chorea, diabetes mellitus, epilepsy, toxic goiter, hyperthyroidism, hyperglycemia, hypertension, hypotension, asthma, hay fever, hyperemesis of pregnancy, sexual impotency, insanity due to endocrine failure, menopause disorders, migraine, menstrual dysfunction, paralysis agitans, phlebitis, poliomyelitis, paralytic sequellae, pancreatic dysfunction, pernicious anemia, nephritis, ideopathic [sic] ovarian disorders, prostate enlargement, peptic ulcers, sclerosis, rheumatic fever and varicose veins

(7) atrophy of organs and glands (testes, liver, spleen, thyroid, pituitary and salivary), infections and degenerations of eyes, physical weakness, nervousness, insomnia, gland swelling in general, renal calculi, bronchitis, endocrinopathies of childhood, nervous indigestion, neurasthenia, disorders of pregnancy, sterility, hypogalactia, retarded growth, loss of hair, fatty infiltration and degeneration of the liver, symptoms of nerve degeneration, Paget’s dermatosis, gastro-enteritis, infantile gastro-intestinal disorders, glycosuria, malnutrition, sprue, low resistance, kidney and bladder disorders, renal dysfunction, formation of stones (calculi), excessive growth of lymphoid tissue, lympathic gland enlargement, loss of weight and vigor, low vitality, stunted growth, emaciation, enlargement of liver, kidney and spleen, acidosis, and [prevention of] carcinoma

The substances to which these claims were attached? Various vitamin and mineral supplements (including A, C, B-complexes) that included various plant and animal extracts, and Catalyn (mostly milk sugar and various wheat extracts, with other plant materials and some “glandular extracts”). I think the list speaks for itself. If still not convinced, I’m certainly happy to dig through more old FDA paperwork and show what exactly the FDA’s beefs were with Dr. Lee’s products and the sorts of medical claims he made about his vitamin and food supplements.

Dr. Cameron wrote:

You make many judgements without much background information. This is the negative side of internet freedom, because people reading your biased opinion will take it as fact. This is unfortunate.

I would be happy to discuss this with you if you would like more information.

Tom Cameron, DVM 800-848-5061

My response:
I’m not a biologist nor a chemist, but I’m trained in the scientific method, and I’m a skeptic and a critical thinker. I’m open to being educated regarding protomorphogens; I’ll admit that the paucity of literature on this topic makes it somewhat suspect in my eyes, but again, my research was hampered by the fact that protomorphogen is not a scientific term but a trademarked term of art, and the Standard Process sheet was not at all clear. I am more than happy to receive information regarding protomorphogens and the way Renafood is supposed to work. I would prefer links to publicly-available documents so that any readers can read exactly what I’m reading as well and draw their own conclusions, but if that’s not feasible, then I would appreciate it if you would e-mail me more information at my gmail.com address (my username is misshepeshu—I’m giving my e-mail address this way to confound spambots).

Addendum to the last post

Candy — Mon, 22 Feb 2010 20:58:53 +0000

So in my last post, I described Callisto’s periodic assplosions as “random.” This is a completely false characterization. They’re not random at all. They’re directly traceable to one cause: the fact that she exhibits Labrador retriever-like tendencies to eat anything and everything that comes across her way. This has included items like curry, pieces of tissue paper and (most alarmingly) kale braised in onion. The most recent escapade: half of a chicken breast fried with copious amounts of garlic powder. My boyfriend and I are much better about keeping food off the tables and counters now, but we screwed up last night.

The results have been predictable.

Kittens, man. I’ve forgotten how they inspire both love and a desire to throttle.

blows off cobwebs

Candy — Sat, 20 Feb 2010 20:41:24 +0000

It’s been a while since I’ve posted. Law school kind of blew up in my face after Eric died, and then I adopted a kitten, whom we named Callisto (”the most beautiful” in Greek, also synonymous with “Get off the counter!” and “Stop trying to eat that random piece of paper”). All my energies have been focused on a) trying not to flunk out of law school, and b) raising a kitten, up to and including dealing with various kittenish assplosions. Aside from the random gastrointestinal upheavals, she’s pretty amazing, and I want to write more about her. Until I find more time, however, please enjoy these cute pictures I took of her a couple months ago.

Callisto, looking all swank

She is the hilariousest when she's playing.

Enjoying a prime bit of sunny windowsill like a cat should.

I still miss Eric. Some days a lot more than others. Callisto reminds me of him in some ways–she’s the same kind of attention/affection whore, and like Eric, she’ll try to eat anything at least once, and most things at least twice or three times. She’s marginally brighter than Eric, though that’s not saying much, because Eric, bless his departed heart, was dumber than a sack of wet hair.

In short: life is pretty good, if insanely busy. I want to update more, but that’s probably not happening till May.

Somebody needs a kitten

Candy — Fri, 20 Nov 2009 17:56:46 +0000

Hitlercat and Eric, combining their powers of cute.

Ever since Eric’s been gone, Hitlercat, who’s snuggly and affectionate but by and large a pretty independent sort, has become Velcro Kitty with +2 to Squeaking Sadly and +5 to Howling When Left Alone. She quiets down if we bring her into the Forbidden Zones (the zones that Robert and I are trying to keep cat-free as a concession to our allergies, like the game room, a.k.a. the Nerdatorium) and snuggle with her, but right when I come home from school? Oh man. “Squeak! Squee-ee-aak! Mew! Squeak! Mraoowww.” *belly-exposing flop, like, twenty times in a row, complete with curled-up kitten paws*

Last night, however, really broke my heart. She was sitting right by the window, staring out the window intently and meowing and meowing and meowing very plaintively. I thought she wanted love and attention, so I started scritching her head–and then I tracked her line of sight, and realized that she was looking at the neighbor’s cat across the way, who was sitting on the windowsill. She wasn’t pawing at the glass and acting aggressive, the way Eric would when he spotted a strange kitty across the way. She was sitting pretty calmly, tail not twitching, and crying her heart out.

Hitlercat has always liked other cats, even if they don’t like her. I’ve never seen her hissing or swatting at a cat unless they got all aggressive at her first. Her brother was probably the exception–she’d often hiss at him if he got too close and Had That Look In His Eye, but then, Eric, much as I love him, was a grade-A asshole and bully. He’d do things like wait for Hitler to get on my lap and settle in for a good cuddle, and then he’d run over and bite her in the face. But despite their constant sibling squabbling, they still spent all their time together and occasionally snuggled and groomed each other; neither of them had spent any appreciable time alone in their lives. Until now.

I’m going to see what I can do about getting her a new buddy before Christmas. It’ll be good for both of us.

Eric: April ?? 2002 – November 17, 2009

Candy — Thu, 19 Nov 2009 03:49:16 +0000

Eric doing the Happy Kitty Curl. Taken about 2 weeks before he died.

Eric’s heart stopped yesterday, and I had to let him go. I have lots I want to say about his death and the decisions I made along the way, but right now, I’m mostly heartbroken and speechless.

We buried him today in a sunny spot on a hill, and planted a beautiful Edgeworthia on top of him. I almost picked a dogwood, because a) I thought it’d be an antidote to all those people planting pussy willows in honor of their dead cats, and b) Eric loved to hiss and growl and spit at dogs, because in his head, he was the 50-foot-Kitten and not something a Samoyed could eat in one mouthful. Then I found out that dogwoods were susceptible to some fungal infections, and not only were the Edgeworthias hardier, they’re every bit as pretty, and they produce orange-yellow flowers. Here’s hoping there will be fragrant orange flowers in a couple of months.

Please enjoy these two videos of Eric back when he was 3 or 4 years old. The first is of Eric being spun really fast. The second is my favorite Stupid Cat Trick of all time.

Kitten Porn Thursday

Candy — Fri, 06 Nov 2009 07:05:10 +0000

There’s so much I want to post about, such as:

The evidence for and against protein restriction for cats undergoing chronic renal failure
Cat food myths and over-simplifications (variety isn’t necessary, nutrients matter and not ingredients, home-made diets are inherently dangerous, home-made diets are inherently superior, enzymes in raw food are an important nutritional component)
A detailed dissection of the Pottenger cat study (I’ve always cringed when people use it as a justification to feed raw)
The tendency for avid raw feeders to use what sounds remarkably like Lamarckism to bolster their case for raw feeding and against the use of vaccines, which, again: CRINGE

But I don’t have the time and energy, so instead, I bring you KITTY PORN THURSDAY, where I post shots of fuzzy kitty bellies, sleeping cats and gratuitous close-ups of paw pads. Besides an excuse to post copious numbers of cute picture of cats (the other true reason for the existence of the Internet—the first true reason being, of course, porn porn), this is also a great way to post about Hitlercat. Eric’s getting the lion’s share of the attention on this blog right now because he’s sick, and blogging about dealing with his polycystic kidney disease is both more interesting and more educational than entries that say things like “Hitlercat is amazing and adorable and fuzzy and she’s pretty much hands-down my favorite cat of all time and ever.” Which isn’t fair to Hitlercat, because even though she gets fewer blog inches than Eric, she occupies every bit as much space in my heart.

Want a preview of some of the hot hot kitty porn that awaits? Check this out:

Hitlercat sleeping on my purse. I don't know why, because it's not very comfortable. Probably because it inconveniences me.

More below the fold!

Hitlercat in her bunker, looking all smug because the Red Menace isn't battering down her door. Yet.

I don't know whether that crazy-ass hair sticking out of her paw makes this picture less awesome, or more.

I call this one "Kittenball on Orange and Green." Taken by my former roommate Kate, who's currently in Turkey being all awesome and such.

That’s it for now. Tune in next week for another scan’lous episode of Candy’s Cats Being Cute, same Bat-Time, same Bat-Channel.

FDA List of Pet Food Recalls

Candy — Wed, 28 Oct 2009 04:46:24 +0000

Here’s a pretty useful resource if you want to see if the brand you feed has ever issued recalls: the FDA’s list of pet food recalls. Note, however, that it only documents recalls starting January 1, 2006. Although it claims to be current through October 20, 2009, it still doesn’t list the Premium Edge recall.

Premium Edge Cat Food Recall

Candy — Tue, 27 Oct 2009 02:07:07 +0000

Premium Edge Finicky Adult is one of the recalled lines

Premium Edge is voluntarily recalling two different formulas of its dry food for cats: Finicky Adult and Hairball. More details in the press release on their website.

The reason for this recall? Apparently, the cats affected suffered from thiamine deficiency. Pet food recalls are typically driven by contamination with toxins, not nutrient deficiencies, though earlier this year, Nutro had to recall several batches of cat food for sky-high levels of zinc.

Premium Edge’s parent company, Diamond Food, has had problems in the past with aflatoxin contamination in their dog foods; Diamond was also involved in the massive 2007 pet food recall. This review of Premium Edge food has a heart-breaking comment by a person whose cat died eating one of the recalled foods.

This is yet another demonstration that commercial pet food isn’t necessarily safe, much less complete and balanced nutrition for your cat.

For those of you feeling wary about Diamond Pet Food, you can view a fairly comprehensive list of brands they manufacture on their Wikipedia page. Some of them are big-name “natural” brands, like Natural Balance and Canidae.

Renafood

Candy — Tue, 27 Oct 2009 01:21:46 +0000

One of the first things the vet gave me to give to Eric was Renafood, a supplement consisting of various detoxifiers, including beet juice. I’m skeptical that it actually does anything for two main reasons:

1. I feel doubtful about the efficacy of herbal detoxification in general, partly stemming from a skepticism about the quality control and potency of the herbs in any given supplement, and partly stemming from skepticism that herbal detoxification actually works in the way described. I mean, look: my cat’s kidneys are fucked. Thoroughly, utterly fucked. I’m not sure how or why minute amounts of carrot and beet might help him filter waste material more effectively, unless they’re somehow rebuilding his nephrons for him.

2. The logic of some of the claims presented in the Renafood information sheet. So, Renafood contains bovine kidney extract. That extract apparently holds “tissue cell determinants” that will instruct the kidneys to Shape Up, Son. I have no idea what a “tissue cell determinant” is, though I have a very vague memory of learning about cell fate determination—thanks, high school biology! But the information sheet doesn’t give any sort of helpful definition of what these tissue cell determinants do other than talking about something that sort of vaguely sounds like cell fate determination. Quoting from the information sheet:

The bovine kidney PMG extract found in Renafood contains cellular determinants that regulate cell activities. Genetic coding determines the proteins unique to cells in each tissue, gland and organ. Cellular proteins are the foundation of the cell’s nutrition. Similarly, bovine kidney contributes innumerable materials produced in the organ itself, such as acids, enzymes and hormone precursors—each captured and preserved to offer their innate benefits to the corresponding tissues in humans to promote optimal health.

Huh. That sure sounds like a fancy way of saying…nothing much. Prepare for a bulleted list!

The first sentence makes an assertion that the cell determinants in Renafood regulate activities, and the next sentence is a more-or-less correct statement about cell fate determination, but doesn’t tell me how Renafood affects the genetic coding of cells.
The sentence after that reads like a complete non-sequitur. Cellular proteins may or may not be the foundation of a cell’s nutrition (I don’t know enough about biochemistry to begin unraveling what this deceptively simple sentence means), but how does that relate to the thesis sentence or to the conclusion?
Furthermore, what do they mean by “cellular proteins,” especially in this context?
The first part of the last sentence is more-or-less true, because it’s essentially talking about the kidney extract providing proteins, fats and vitamins, but you can feed real food (like, oh, I don’t know, fresh kidney) and, if the Renafood claims are true, get the same effect.
This information sheet from Standard Process explains what cell determinants do and how they relate to protomorphogens (which is apparently what constitutes the bovine kidney extract in Renafood), but it sounds even more gobbledegooky. The cell determinants in protomorphogens are apparently the mineral templates on which chromosomes are constructed. This is, near as I can determine (and I’ve confirmed this with biochemist friends just to make sure I didn’t miss something about cell biology) complete nonsense. Seriously.
I’ve read the info sheet through three times, and I’m still not entirely sure how Renafood keeps cells healthy or helps regenerate cells, because I don’t see how the leap from digestive system to bloodstream to cell division is made—there’s a lot of talk about “affinity” and thermostability and how important cell determinant are, but very little actual science. The most credible-sounding scientific bits aren’t supported by any references, and most importantly, they’re not connected to how the supplement’s supposed to work. Speaking as a former technical writer, this is probably the shoddiest bit of technical writing I’ve ever seen.
It doesn’t help that Royal Lee, the founder of Standard Process, has been prosecuted for criminal misbranding. The FDA has in the past characterized him as “probably the largest publisher of unreliable and false nutritional information in the world.” Given how lackadaisical the FDA has been and continues to be about food and drug regulation, these aren’t just fightin’ words, them’s strong fightin’ words.
Taken as a whole, it sounds like Standard Prociess is claiming that eating Renafood will somehow stimulate kidney cells to work better through a mysterious process involving “cellular determinants.” If that’s not science-esque, I don’t know what is. (”Science-esque 2: This time, it’s not Science-esque 1!”)

In short: I’m not sure I buy into the idea that this does anything. I’m giving it to Eric right now because he loves it, and it doesn’t contain anything that seems overtly harmful. But my woo-woo meter is on alert, and if you want to save yourself $16, I’d argue that this supplement doesn’t do anything other than provide a nice source of vitamin A and a tasty snack.

Using Nutritional Yeast in Feline Renal Failure Diets

Candy — Tue, 27 Oct 2009 00:53:22 +0000

I stopped feeding nutritional yeast a while back, because I was feeding quite a bit of canned food and quite a bit of liver. However, given that liver contains a higher phosphorus-to-B-vitamin ratio, and given the fact that I’m feeding my cats canned food maybe once every ten days now, I’m feeding about twice the nutritional yeast than I normally would, i.e., almost two teaspoons per cat per day.

Several reasons why I’m doing this:

1. Eric’s peeing a whole lot, which means he’s losing a lot of water-soluble vitamins, like B vitamins. Nutritional yeast contains a LOT of B vitamins. Here’s a some relevant information (lifted from Bulkfoods.com); quantities are per heaping tablespoonful, which is close to what I feed total for both cats every day:

Thiamin (B1): 9.6 mg
Riboflavin (B2): 9.6 mg
Niacin: 56 mg
Vitamin B6: 9.6 mg
Folic Acid: 240 mcg
Vitamin B12: 8 mcg
Biotin: 20.8 mcg
Pantothenic Acid: 1.04 mg
Phosphorus: 174.4 mg
Calcium: 11.2 mg

I initially wanted to find a meat-based food source of B vitamins, and what popped to mind immediate was chicken liver. But chicken liver can’t even come close. Here’s the B-vitamin profile for two ounces of liver (approximate 7 grams)—again, I’m approximating how much I’d feed to both cats per day:

Calcium: 5 mg
Phosphorus: 169 mg
Thiamin: 0.174 mg
Riboflavin: 1.013 mg
Niacin: 5.545 mg
Pantothenic acid: 3.553 mg
Vitamin B-6: 0.486 mg
Folate, total: 335 mcg
Folic acid: 0 mcg
Folate, food: 335 mcg
Choline, total: 110.8 mg
Vitamin B-12: 9.45 mcg

So about the same amount of phosphorus between the nutritional yeast and the liver, but except for B-12, folate and pantothenic acid, the nutritional yeast gives more B-complex bang for the buck (and it’s a pretty close match for the B-12). The USDA National Nutrient Database doesn’t give the value for biotin in liver, so I don’t know how that compares in chicken liver vs. nutritional yeast, but I’m feeding egg yolks on a regular basis, so I know the cats are getting plenty of biotin no matter what.

2. Wow. That was a really long point. This second one is much shorter, I promise, and it boils down to this: Both cats really love the taste, but Eric loves it. And I mean, he really, really loves it. More than a fat kid loves cake. And given his depressed appetite, I’m perfectly happy to indulge him in this for as long as he’s around, and as long as it keeps him happy and eating.

3. Again, because of the increased peeing, Eric’s losing more potassium than he should. A heaping tablespoonful of yeast contains 320 mg of potassium and 5.2 mg of sodium. (Chicken liver is pretty good, too, but not quite as good; two ounces contains 131 mg of potassium and 40 mg of sodium.) That’s pretty much perfect: lots of potassium to make up for what he’s losing, and relatively little salt, because cats with chronic kidney disease often have difficulty eliminating sodium, which can sometimes result in high blood pressure.

4. Eric’s phosphorus and calcium levels are normal. I wouldn’t feed this to a cat with elevated phosphorus, or at least, I wouldn’t feed it without a phosphorus binder. I’d go with a B-complex vitamin supplement instead. But I want to keep his nutritional supplementation as food-based as possible for now. Note that this choice is a decision based more on philosophy than science, driven largely by my opinion that food will provide better nutrition than, well, bare, isolated nutrients.

To feed, or not to feed? That is the question.
Whether ’tis nobler to suffer the slings and arrows of yeasty misfortune… OK. Right. Sorry about that. At any rate, I’ve heard people express concern about feeding nutritional yeast as a dietary staple, but I have yet to read an explanation that makes sense to me. It’s definitely high in phosphorus, but you can compensate for that in a home-made diet by ensuring you’re providing enough calcium. There’s some talk about how it’s a cheap by-product of beer brewing, but that’s brewer’s yeast. From what I understand, they’re the same species (Saccharomyces cerevisiae), but nutritional yeast is grown and killed solely as a nutritional supplement and isn’t used for brewing first. (I’ve read conflicting information on this, and will be more than happy to be corrected.)

I’ve read other people expressing concerns about it “fermenting” in the stomach (Feline Future used to claim this, but seems to have backed off since then), which: what? First of all, it’s completely deactivated, which means it’s dead—it can’t reproduce and actually, y’know, ferment. Now, if we’re talking about live yeast, like baker’s yeast or active brewer’s yeast, that would be a different matter entirely; I knew somebody whose dog stole and ate two batches of raw bread dough (labradors, man) and had to be taken to the ER because the bread started expanding in his stomach. So if there’s going to be any fermentation, that means microorganisms acting on the dead yeast as a substrate.

Now, nutritional yeast is pretty high-protein (about 50% of it consists of protein dry weight), and over half of its carbohydrate content is fiber. Protein, as far as I know, generally isn’t fermented; most fermentation tends to happen with carbohydrates. But the amount of digestible carbohydrate in nutritional yeast is pretty marginal (3.3 g per heaping tablespoon) and the fiber may or may not be fermentable. If the fiber is fermentable, it’ll probably be fermented by bacteria in the colon, not in the stomach because feline stomachs are relatively sterile environments. But fermentation in the colon isn’t necessarily a bad thing—in fact, depending on the degree of fermentability, it could actually be a good thing. (Note to self: find out whether the fiber in nutritional yeast is soluble/insoluble, fermentable/non-fermentable).

However, if somebody has heard any sort of warning about nutritional yeast that’s backed up by something that makes scientific sense, I’m all ears. For now, my Google-fu hasn’t really turned up anything I need to watch out for.

Yet Another Cat Food Guide

Renafood Redux, or: The Reply Comment that Ate the Blog

Addendum to the last post

*blows off cobwebs*

Somebody needs a kitten

Eric: April ?? 2002 – November 17, 2009

Kitten Porn Thursday

FDA List of Pet Food Recalls

Premium Edge Cat Food Recall

Renafood

Using Nutritional Yeast in Feline Renal Failure Diets

blows off cobwebs