# Beef

Category: Foods & Substances

Also known as: red meat, muscle meat

Beef and other muscle meats are not an ideal source of protein because they provide an excess of several factors that support degenerative processes. Peat argued that red muscle meats contain too much iron, phosphate, tryptophan, and other excitatory amino acids, and that…

10 passages · 3 authors · 2008–2023 · Most-cited: [Ray Peat](https://bioenergeticoracle.com/md/voices/ray-peat/index.md)

Canonical page: https://bioenergeticoracle.com/concepts/beef

## Synthesis

**Beef** and other muscle meats are not an ideal source of protein because they provide an excess of several factors that support degenerative processes. Peat argued that red muscle meats contain too much **iron**, **phosphate**, **tryptophan**, and other excitatory amino acids, and that everything it provides too much of tends to support cancer development and degenerative processes. [Source 1] He specifically identified the amino acids **methionine**, **cysteine**, and **tryptophan** as correlating with aging, inflammation, and loss of thyroid function. [Source 1] The heme iron in beef also has toxic effects, forming carbon monoxide apart from the iron itself. [Source 2]

The fundamental problem with muscle meat is that its amino acid profile directly suppresses thyroid function. Peat explained that when the body resorts to cortisone and destroys its own muscles, the muscle dissolution entering the bloodstream suppresses the thyroid; eating a simple steak or hamburger mimics this stress state because the body cannot tell the difference between stress and eating simple meat. [Source 9] Dinkov has elaborated that tryptophan is the only amino acid that is directly carcinogenic, and that methionine acts as a potent anti-thyroid chemical, with human studies showing that drastic methionine restriction causes the metabolic rate to climb. [Source 4] These inflammatory amino acids are also *GABA antagonists*, putting the brain into a state of excitotoxicity if not balanced by anti-inflammatory amino acids. [Source 8]

The anti-inflammatory amino acids that oppose these effects—**glycine**, **proline**, and **hydroxyproline**—are found mostly in collagen, not in muscle meat. [Source 4] Peat discovered that consuming several grams of gelatin before bedtime allowed him to sleep through the night without interruption, and friends reported relief from long-standing arthritic and rheumatic pain after taking 10 to 15 grams of gelatin daily. [Source 5] Dinkov recommends consuming collagen in at least a *one-to-one ratio* with the sum of methionine, tryptophan, and cysteine from muscle meat to balance the inflammatory and anti-thyroid effects. [Source 4] Ground beef, which includes connective tissue, skin, and other cheaper parts ground together, is actually healthier than pure muscle cuts like filet mignon because it contains more of this balancing collagen. [Source 6]

Beyond its amino acid composition, commercial beef carries additional toxic burdens from industrial production practices. Peat documented that animals are treated to maximize water retention before slaughter, with stress, fatigue, and excess estrogen causing tissues to swell hugely without increasing protein content. [Source 3] Synthetic estrogens like DES were used for decades to cause massive water retention, and while DES was outlawed, other estrogens remain openly used. [Source 3] The deliberate aging of meat—two or three weeks of cold storage—subjects it to a standardized stress that produces **polyamines**, which intensify the neurotoxic and carcinogenic effects of estrogen and polyunsaturated fats. [Source 7] Peat noted that *grass-fed organic beef fresh from a local farm* would be a reasonable choice, as it avoids the maximized dangers of industrial processing. [Source 7]

When consuming beef, practical mitigation strategies include balancing it with gelatin, extra calcium, and iron-absorption inhibitors like coffee. [Source 10] Roddy notes that when balanced with calcium and gelatin, muscle meats transcend their proinflammatory nature and can support metabolism. [Source 10] Peat pointed to traditional preparations where stewing a whole chicken yields gelatin from the skin, bones, and connective tissues, providing about half the protein as a perfectly balanced set of amino acids—approximating what primitive cultures ate daily. [Source 9] Shellfish like scallops, crab, and shrimp represent superior protein sources, being high in copper in relation to iron. [Source 1]

## People also ask

### Why does Ray Peat consider beef an inferior protein source?

Peat argued that beef muscle meat supplies excess iron, phosphate, tryptophan, methionine, and cysteine, which suppress thyroid function and support degenerative processes, while lacking the balancing anti-inflammatory amino acids found in collagen.

### How can you offset the anti-thyroid effects of eating a steak?

The corpus recommends consuming collagen or gelatin in at least a one-to-one ratio with the inflammatory amino acids from muscle meat, along with extra calcium and iron-absorption inhibitors like coffee, to balance the anti-thyroid and excitotoxic effects.

### What makes ground beef healthier than a lean muscle cut like filet mignon?

Ground beef typically includes connective tissue, skin, and other parts that provide more collagen, supplying glycine, proline, and hydroxyproline to counter the inflammatory and thyroid-suppressing amino acids concentrated in pure muscle cuts.

## Related concepts

- [Gelatin](https://bioenergeticoracle.com/md/concepts/gelatin/index.md)
- [Glycine-to-Methionine Balance](https://bioenergeticoracle.com/md/concepts/glycine-to-methionine-balance/index.md)
- [Zinc](https://bioenergeticoracle.com/md/concepts/zinc/index.md)
- [Adrenaline](https://bioenergeticoracle.com/md/concepts/adrenaline/index.md)
- [Aldosterone](https://bioenergeticoracle.com/md/concepts/aldosterone/index.md)
- [Aspirin](https://bioenergeticoracle.com/md/concepts/aspirin/index.md)

## Cited passages

Passage numbers match the `[Source N]` markers in the synthesis above.

### Source 1 — One Radio Network: Ray Peat with Patrick Timpone — January 17, 2022

Ray Peat · Interview · Jan 17, 2022

> **Patrick Timpone:** and so meat like muscle meat or ribeye and t-bones that is fun to eat that has a lot of iron
>
> **Ray Peat:** Yeah, as well as for most people, too much phosphate and too much tryptophan and other excitatory amino acids. And too much heme. Everything that it provides too much of tends to support cancer development and degenerative processes. Wow.
>
> **Patrick Timpone:** So, but I thought tryptophan is a sleepy time, you say, but it's excitatory or inflammatory in the meat, tryptophan?
>
> **Ray Peat:** Yeah, there's three amino acids that correlate with aging, degeneration, and aging. inflammation, loss of thyroid function, are methionine, cysteine, and tryptophan.
>
> **Patrick Timpone:** Wow. So chicken, beef, pork, any difference there?
>
> **Ray Peat:** Yeah, a little bit. The red muscle meats have quite a bit more iron. Mm-hmm. Mm-hmm.
>
> **Patrick Timpone:** So chicken, a little bit easier on the body?
>
> **Ray Peat:** For the iron content.
>
> **Patrick Timpone:** For the iron content, anyway. And then how about fish in general? I think I remember I've been kind of eating, you said some of the best choices are scallops. You like scallops, a good choice?

### Source 2 — Ray Peat Email Advice Depository — Post 96

Ray Peat · Email · Jul 25, 2013

> **Question:** All the studies i have seen claims that Heme iron absorption is not changed by other factors like tea and coffee. Do you know of any study that shows coffee inhibiting heme iron absorption? I found this study showing beef liver has 13 percent heme iron and beef meat has 64 % heme iron. If this is true then muscle meat is more harmful than liver in terms of iron absorption . [http://www.ncbi.nlm.nih.gov/pubmed/19475341](http://www.ncbi.nlm.nih.gov/pubmed/19475341) Here is his response. It seems like fresh meat has ferrous iron, the bad kind and older meat will be in ferric form, the good kind. There is another reason to avoid iron rich animal foods
>
> **Ray Peat:** I think that's true, that coffee affects mainly non-heme iron absorption. The heme has toxic effects, forming carbon monoxide, apart from the iron. As I understand it, the amount of non-heme iron that's absorbed increases with the extent of its reduction, with ferrous iron being absorbed much more than the ferric form. The presence of reductants in the food will increase absorption. [references]

### Source 3 — Meat physiology, stress, and degenerative physiology.

Ray Peat · Article · 2014 · https://raypeat.com/articles/articles/meat-physiology-stress.shtml

> Before the slaughtered animal is put into the soaking solution to gain a specific amount of weight, the animal has almost always been treated in ways that cause it to go to slaughter in a state of massive edema. Even before the meat is soaked, the animal has been treated to maximize its water retention.
>
> Muscle physiologists and endocrine physiologists know that fatigue, stress and excess estrogen can cause the tissues to swell hugely, increasing their weight and water content without increasing their protein content.
>
> As soon as cheap synthetic estrogens, such as DES, became available in the 1940s, their use in animals was promoted because it was clear that they caused massive water retention. Women who suffer from hyperestrogenism always have a problem with water retention, but they have never been known to suffer from over-developed skeletal muscles. In fact, in humans of both sexes, an excess of estrogen has been commonly associated with sarcopenia, muscular dystrophy, and atrophy of the skeletal muscles. Similar observations have been made in a variety of animals. Meat scientists are the only people I know of who have ever referred to estrogen as an anabolic steroid, in the sense of "building muscle."
>
> When it was publicized around 1970 that DES is powerfully carcinogenic, after it had been used for several decades in the meat industry, its use was outlawed, but its illegal use continued and was overlooked by the US government. The Swiss government has rejected meat from a large producer in Kansas because it contained DES. Other estrogens are openly used, and the US government continues to apply pressure to other countries to accept meat exports containing estrogens.
>
> There are many ways to increase the water content of meat, besides feeding estrogen to the animal and soaking the meat after slaughter. Everything that causes water retention and tissue swelling in the living animal, that is, every kind of stress, fatigue, poisoning, malnutrition and injury, will make the animal gain weight, without consuming expensive nutritious food. Crowding, fright, and other suffering increase water retention and accelerate the breakdown of fats and proteins.
>
> The water content of meat shouldn't be increased by any of those methods, not only because it is a form of stealing from the consumer, but because it makes the product toxic and unappetizing, and makes the production process a degrading experience.

### Source 4 — Animal-based vs. Ray Peat diet, a conversation with Georgi Dinkov

Georgi Dinkov · Interview · Dec 20, 2022 · https://www.youtube.com/watch?v=9ZM9sCfmAGc

> **Georgi Dinkov:** um initially thought that it was the amount of calories that you're consuming and if you lower that then you're basically living longer don't know that it's not don't know that it's specific nutrients tryptophan restriction methionine restriction or cysteine restriction either one of these or all three combined much more synergistic effect actually increase not average maximum lifespan which is what really you want to increase right uh basically increase it by about 20 to 30 percent so and actually uh dwarfed the effects of caloric restriction right uh by restricting the the amount of these amino acids down to zero recent human study demonstrated that if you lower the amount of methionine down to 2 milligrams per kilogram body weight per day, which means if somebody weighs 100 kilos, let's say 200, okay, 100 kilos because it's easier to calculate. If somebody weighs 100 kilos, which is 250 pounds maybe, right, a pretty decent weight, this means that they need, if they can consume no more than 200 milligrams of methionine daily, it can cure their obesity, it can cure their type 2 diabetes in a matter of weeks. uh guess what most people the actually not most the vast majority of people on a western diet are consuming several grams of methionine per day so we're getting way more than what we need and several studies now including humans have demonstrated methionine restriction is very very highly beneficial and that study with humans demonstrated when you drastically restrict methionine intake the metabolic rate starts to climb up which supports the idea that methionine is a potent anti-thyroid chemical which has been known from earlier studies. So that's the big problem with the muscle meats is that they're very high in these amino acids, but they're very low on the amino acids that oppose those bad amino acids, such as glycine, proline, hydroxyproline, various other derivatives that are found mostly in collagen.

### Source 5 — Gelatin, stress, longevity

Ray Peat · Article · 2009 · https://raypeat.com/articles/articles/gelatin.shtml

> Pavlov's observation of its effectiveness in stimulating the secretion of digestive juices occurred because the stimulating value of broth was already recognized.
>
> Although I pointed out a long time ago the antithyroid effects of excessive cysteine and tryptophan from eating only the muscle meats, and have been recommending gelatinous broth at bedtime to stop nocturnal stress, it took me many years to begin to experiment with large amounts of gelatin in my diet. Focusing on the various toxic effects of tryptophan and cysteine, I decided that using commercial gelatin, instead of broth, would be helpful for the experiment. For years I hadn't slept through a whole night without waking, and I was in the habit of having some juice or a little thyroid to help me go back to sleep. The first time I had several grams of gelatin just before bedtime, I slept without interruption for about 9 hours. I mentioned this effect to some friends, and later they told me that friends and relatives of theirs had recovered from long-standing pain problems (arthritic and rheumatic and possibly neurological) in just a few days after taking 10 or 15 grams of gelatin each day.
>
> For a long time, gelatin's therapeutic effect in arthritis was assumed to result from its use in repairing the cartilage or other connective tissues around joints, simply because those tissues contain so much collagen. (Marketers suggest that eating cartilage or gelatin will build cartilage or other collagenous tissue.) Some of the consumed gelatin does get incorporated into the joint cartilage, but that is a slow process, and the relief of pain and inflammation is likely to be almost immediate, resembling the antiinflammatory effect of cortisol or aspirin. Inflammation produces fibrosis, because stress, hypoxia, and inadequate supply of glucose stimulate the fibroblasts to produce increased amounts of collagen. In lungs, kidneys, liver, and other tissues, glycine protects against fibrosis, the opposite of what the traditional view would suggest.
>
> Since excess tryptophan is known to produce muscle pain, myositis, even muscular dystrophy, gelatin is an appropriate food for helping to correct those problems, simply because of its lack of tryptophan. (Again, the popular nutritional idea of amino acids as simply building blocks for tissues is exactly wrong—muscle protein can exacerbate muscle disease.)

### Source 6 — Estrogen, Histamine, Serotonin & Endotoxin with Georgi Dinkov | Rooted In Resilience Podcast #3

Georgi Dinkov · Interview · Mar 6, 2023 · https://www.youtube.com/watch?v=1FUmAsj8KEE

> **Ashley:** No one here is saying don't eat muscle meat. It's just if you are struggling with your metabolic rate, you should really be considerate of how you're balancing your amino acid intake and making sure that you are prioritizing a lot of glycine and making sure you're getting bone broth in. And honestly, just eat ground beef. If you're going to eat muscle meat, save money and just eat ground beef over a tenderloin and chicken breast. Because the ground beef has so much of the connective tissue.
>
> **Georgi Dinkov:** Exactly, collagen, yeah. Because it's the cheaper part. Our market system is kind of flipped upside down. You know, if you buy the pyramid, it's more expensive, but the ground beef in which they grind skin... ears, I don't know, whatever they have, like the cheaper stuff actually turns out to be, you know, the one that's better for us. So it's better to get good ground beef from the store, especially, I don't know if it's organic is any better, but because I looked at it, they taste the same to me. I've tested them in the lab. They aren't that much different in terms of the heavy metals or any contamination. So good ground beef is likely to be healthier for you than any of the pure muscle meats, unless we're talking about stuff like, you know, piece of meat with the skin on top, which some people do with pork. um or you know you're getting some of the real the tougher cuts of the beef like skirt steak i think is very also very cheap because people don't like it they're saying oh it's very tough to chew yeah

### Source 7 — Meat physiology, stress, and degenerative physiology.

Ray Peat · Article · 2014 · https://raypeat.com/articles/articles/meat-physiology-stress.shtml

> Because the polyamines intensity the neurotoxic and carcinogenic effects of estrogen and of polyunsaturated fats, those three types of substance should be considered as a functional unit in making food choices. (Grass-fed organic beef fresh from a local farm would be a reasonable choice.) Unfortunately, the meat industry has maximized all of those dangers, just for the increased weight of their product.
>
> [references]

### Source 8 — Episode 272 - Carnivore vs. Carbs Debate: Dr. Anthony Chaffee and Georgi Dinkov!

Georgi Dinkov · Interview · Jul 21, 2023 · https://www.youtube.com/watch?v=k_LFfSyUADQ

> **Georgi Dinkov:** But if you're eating pure muscle meat, you're getting basically a lot of these suboptimal of these three amino acids in quantities. that are basically probably having potentially a negative effect on your health, unless they're being balanced by these other amino acids, which are known to be anti-inflammatory, such as glycine, proline, and hydroxyproline. Taurine is another very similar one. They all happen to be, by the way, all of these anti-inflammatory amino acids all happen to be GABA agonists. alanine, glycine, and taurine, while methionine, cysteine, and tryptophan are GABA antagonists. So they're going to put your brain into a state of a little bit of excitotoxicity, if I could say that, if you're eating too much of those amino acids and they're not being balanced by the anti-inflammatory amino acids. So I think we're in agreement. It's just a question of, okay, how much meat you're eating? Is it fresh? Right? And also, basically, are you doing something to putting the calcium to foster ratio aside? Because there are no human studies yet that show what is the optimal ratio. I think the other thing that I would potentially worry about is the excess of these three amino acids because they're mostly present in muscle meats. But if you're consuming organ meats, if you're consuming collagen, right? If you're eating the whole animal, which is what traditionally is done in these, we call it primitive cultures, but I think they're very smart. We're the primitive ones. We're eating crap. I think it's perfectly fine as a diet. Yeah, that's pretty much it.

### Source 9 — Ask the Herb Doctor: Thyroid and Polyunsaturated Fatty Acids

Ray Peat · Interview · Jul 1, 2008 · http://www.l-i-g-h-t.com/files/herb-doctors-thyroid-and-polyunsaturated-fatty-acids-new-56-mins.mp4

> ## Diet and Metabolism
>
> **Sarah Murray:** So they have a more balanced ratio of proteins, not just the muscle meat like we eat in America?
>
> **Ray Peat:** Muscle meat is very powerful at suppressing the thyroid because that's its function. When we resort to cortisone, we destroy our muscles. The muscle dissolution coming into the bloodstream suppresses the thyroid. So when you eat a simple steak or hamburger, your body can't tell the difference between stress or eating simple meat. It suppresses your thyroid because of the imbalance of amino acids.
>
> **Sarah Murray:** What can people do to eat a protein that isn't going to suppress their thyroid?
>
> **Ray Peat:** If you stew a chicken and skim off the fat after it has cooked the meat loose from the bones, you will get gelatin out of the skin, bones, and connective tissues, which will be about half of the protein of the whole chicken. That would be what the primitive cultures were eating every day—a perfectly balanced set of amino acids. You can approximate that by eating shellfish, shrimps, and oysters, where you eat the whole body of the animal. Milk and cheese are also pretty good for the protein balance.

### Source 10 — The Peat Whisperer

Danny Roddy · Book · 2012

> ### “Refined” Muscle Meats
>
> **Danny Roddy:** Beef, lamb, and bison are easy-to-obtain rich sources of nutrients, saturated fats, and protein. When balanced with calcium and gelatin, muscle meats transcend their proinflammatory nature, supporting the metabolism. Extra measures can be taken when consuming large amounts of muscle meats. Gelatin, extra calcium, and iron-absorption inhibitors (coffee and calcium) are a good idea whenever consuming “refined” muscle meats.

_Generated 2026-07-20 from the Bioenergetic Oracle corpus._