Ray Peat Diet Approved Foods List: The Complete Guide to Bioenergetic Eating

If you are new to eating a bioenergetic diet (sometimes called "peating"), the sheer volume of information across Dr. Ray Peat's articles, interviews, and books can feel overwhelming. This guide distills his published work into a practical, organized food list you can reference when shopping, cooking, or planning meals.

One important note before we begin: Ray Peat never published an official approved foods list. What he did publish, across decades of articles and interviews, was a set of physiological principles centered on supporting oxidative metabolism, thyroid function, and hormonal balance. The foods listed here are derived directly from those principles and from specific foods he discussed in his writing and interviews. As with any dietary framework, individual responses vary. Pay attention to how your body reacts as you introduce these foods.

---

The Core Principles Behind the Food List

Understanding why certain foods appear on this list (and others do not) comes down to a few recurring themes in Peat's work:

1. Sugar over starch. Peat emphasized that fructose and sucrose replenish liver glycogen more efficiently than starch. When liver glycogen is adequate, the body converts thyroid hormone T4 into the active form T3. When it runs low, the body releases stress hormones (cortisol, adrenaline) to break down tissue for fuel. Fruit sugar helps prevent that cascade.

2. Saturated fat over polyunsaturated fat. Polyunsaturated fatty acids (PUFAs), particularly from seed oils and most nuts, suppress thyroid function and are prone to lipid peroxidation. Saturated fats like coconut oil, butter, and tallow are stable and do not interfere with thyroid metabolism.

3. Protein quality matters. Excess muscle meat provides high amounts of tryptophan, cysteine, and methionine, amino acids Peat associated with increased serotonin, suppressed thyroid function, and inflammation. Balancing muscle meat with gelatin or collagen (rich in glycine and proline) offsets this effect.

4. Gut health drives systemic health. Ray frequently discussed how indigestible fibers and certain plant compounds feed intestinal bacteria, increasing endotoxin (lipopolysaccharide) absorption. Foods that reduce bacterial load in the gut, like the raw carrot salad and well-boiled mushrooms, were central to his recommendations.

---

Complete Ray Peat Diet Food List

FRUITS (The Primary Carbohydrate Source)

Ripe, sweet fruit was the cornerstone carbohydrate in Peat's framework. He consistently recommended fruit sugar over starch for maintaining liver glycogen and supporting thyroid conversion.

• Peaches

• Nectarines

• Plums

• Apricots

• Other Fruits

• Grapes

• Dates (in moderation)

• Figs (in moderation)

• Persimmons (very ripe)

• Pears (very ripe, soft)

• Apples (ripe and sweet varieties)

• Honeydew

• Stone Fruits (only when very ripe)

• Cherries

• Citrus Fruits

• Oranges

• Tangerines

• Satsumas

• Clementines

• Grapefruit (if tolerated; some find it too bitter or acidic)

• Tropical Fruits

• Papaya

• Guava

• Lychee

• Rambutan

• Longan

• Mango (very ripe)

• Melons

• Watermelon

• Cantaloupe

FRUIT JUICES

Peat frequently recommended fruit juice, particularly orange juice, as a convenient and effective way to supply fructose and sucrose. He often noted that pulp-free juice is easier on the gut for those with digestive sensitivity, as insoluble fiber can feed intestinal bacteria.

• Orange juice (freshly squeezed or high-quality commercial, pulp-free preferred)

• Grape juice

• Cherry juice

• Apple juice (clear/filtered is generally better tolerated than cloudy)

SWEETENERS

Peat viewed refined white sugar and honey as legitimate energy sources, not as "empty calories." He explained that sucrose (half glucose, half fructose) is an efficient fuel that supports liver function and suppresses stress hormones.

• White cane sugar (pure sucrose)

• Honey (raw or regular)

• Maple syrup (real, not imitation)

DAIRY (The Ideal Protein Source)

Dairy was arguably the most important protein category in Peat's dietary framework. He valued milk for its calcium-to-phosphorus ratio, its complete amino acid profile, and its ability to lower parathyroid hormone.

• Milk (whole or skim, depending on fat tolerance and PUFA-reduction goals)

• Cheese (hard, aged varieties: Parmesan, cheddar, Swiss, Gouda, Edam)

• Cottage cheese (check labels for gums and thickeners; plain is best)

• Cream

• Ice cream (simple ingredients only: milk, cream, sugar, egg yolks; avoid those with gums, carrageenan, or seed oils)

EGGS

Peat considered eggs an excellent protein source. He noted that some people react to egg whites (due to avidin or other proteins) and suggested eating just the yolks if digestive issues or allergic symptoms occur.

• Whole eggs

• Egg yolks (especially useful for those sensitive to egg whites)

GELATIN AND COLLAGEN

Peat wrote extensively about the importance of glycine and proline, the dominant amino acids in gelatin. He recommended gelatin to balance the methionine, tryptophan, and cysteine found in muscle meat.

• Bone broth (homemade from beef or lamb bones)

• Hydrolyzed collagen powder (unflavored)

• Powdered gelatin (for making desserts, adding to coffee, or cooking)

• Oxtail, shanks, and other gelatinous cuts of meat

• Pig feet / pork skin (if from a clean source; the gelatin content is the value here)

SEAFOOD

Shellfish ranked high in Peat's recommendations due to their mineral content, particularly selenium, zinc, and copper. He preferred low-fat white fish over fatty fish to minimize PUFA exposure.

• Cod

• Sole

• Halibut

• Flounder

• Haddock

• Tilapia

• Shellfish

• Oysters

• Shrimp

• Crab

• Lobster

• Mussels

• Clams

• Scallops

• White Fish (low-fat, low-PUFA)

RUMINANT MEATS

Peat generally favored ruminant animals (cattle, sheep, goats, bison) over poultry and pork because ruminant fat is more saturated and contains less PUFA. He recommended choosing lean cuts and adding your own saturated fat (butter, coconut oil, tallow) rather than relying on the fat marbled into the meat.

• Beef (lean cuts preferred)

• Lamb

• Bison

• Goat

ORGAN MEATS

Peat recommended liver specifically and repeatedly, primarily for its preformed vitamin A (retinol) and copper content. He suggested eating it once or twice per week rather than daily, to avoid excess vitamin A accumulation.

• Beef liver (once or twice a week)

• Lamb liver

• Beef kidney (occasionally)

FATS AND OILS (Saturated and Stable)

This category is one of the most distinctive aspects of Peat's dietary framework. He was emphatic that polyunsaturated fats suppress thyroid function, promote lipid peroxidation, and contribute to inflammation and aging. Only highly saturated or monounsaturated fats made his list.

• Lamb tallow

• Cocoa butter

• Coconut oil (refined or unrefined)

• Butter

• Ghee (clarified butter)

• Beef tallow

VEGETABLES (Used Selectively)

Peat did not view vegetables as a dietary staple in the way mainstream nutrition does. He cautioned that most vegetables contain anti-nutrients (oxalates, goitrogens, lectins) and indigestible fibers that increase intestinal bacterial fermentation and endotoxin production. The vegetables he did recommend serve a specific functional purpose.

• Raw Carrot Salad

This was Peat's most frequently recommended vegetable preparation. A raw carrot, peeled or rinsed and grated or shaved into ribbons, dressed with coconut oil, white vinegar, and salt. The unique fiber in raw carrot acts as an intestinal antiseptic, binding endotoxin and helping the body excrete excess estrogen through the bowel. Peat recommended eating this daily.

• Well-Boiled Button Mushrooms

Peat recommended boiling white button mushrooms for an extended period (at least one to two hours in some references) to destroy agaritine, a naturally occurring toxin. Once boiled, mushrooms provide a gut-cleansing effect similar to the raw carrot.

• Bamboo Shoots

Canned or boiled bamboo shoots were another food Peat mentioned for their intestinal fiber-sweeping properties.

FUNCTIONAL FOODS AND BEVERAGES

• Coffee

Ray Peat was well known for his positive view of coffee. He discussed its magnesium content, B vitamin content, and the metabolic benefits of caffeine, which increases the metabolic rate and supports thyroid function. He recommended drinking it with sugar and milk or cream to buffer stomach acid and prevent blood sugar drops.

• Salt

Peat frequently emphasized that adequate sodium intake lowers adrenaline and supports digestion. He considered salt restriction harmful for most people and recommended salting food to taste.

• Carbonated Water / Mineral Water

Peat valued carbon dioxide for its protective, anti-inflammatory properties. He viewed carbonated water as a simple way to increase CO2 intake.

• Dark Chocolate

High-quality dark chocolate (made with cocoa butter, sugar, and cocoa) is acceptable because cocoa butter is a highly saturated fat. Avoid chocolate products made with soy lecithin or vegetable oils where possible.

---

SUPPLEMENTS PEAT COMMONLY DISCUSSED

While not foods per se, these appeared so frequently in Ray's writing and interviews that they are worth noting. Keep in mind that this is not medical advice, please discuss any new supplements with your trusted healthcare provider before trying them:

• Aspirin (for its anti-estrogenic, anti-inflammatory, and anti-serotonin effects; always discuss with a healthcare provider)

• Vitamin D (especially in winter or for those with limited sun exposure)

• Vitamin K2 (for calcium metabolism)

• Pregnenolone and progesterone (discussed extensively in his articles on hormones; these require careful, informed use)

• Thyroid supplementation (Peat discussed this in the context of addressing hypothyroidism; requires medical supervision)

• Vitamin E (mixed tocopherols; Peat discussed its role in protecting against PUFA-related damage)

• Niacinamide (vitamin B3; Peat discussed its anti-inflammatory properties and role in energy metabolism)

---

GREY AREA FOODS

These are foods that are not ideal within Peat's framework but that he acknowledged as tolerable in moderation or with proper preparation. If you are just starting out or are actively trying to address a health issue, you may want to minimize these. If your metabolism is already in good shape, occasional inclusion is unlikely to cause problems.

• Potatoes

Peat considered potatoes a "safer" starch compared to grains, but still secondary to fruit as a carbohydrate source. They must be very well cooked (boiled or baked thoroughly) and eaten with a saturated fat like butter to slow glucose absorption. Resistant starch in undercooked potatoes feeds gut bacteria, which is the main concern.

• Sweet Potatoes and Yams

Similar to potatoes. Acceptable when thoroughly cooked and eaten with fat. Some people tolerate these better than white potatoes.

• Sourdough Bread

Peat acknowledged that traditional sourdough fermentation breaks down much of the gluten and anti-nutrients present in grain. He considered it a better option than commercial yeast bread but still viewed grains as gut-irritating and starch-heavy. If you eat bread, genuine long-fermented sourdough with butter is the least problematic option. Using organic flour is also worth considering, as glyphosate residues on conventional grain may have additional negative effects on the gut.

• Olive Oil

Peat noted that authentic olive oil (genuinely cold-pressed, not adulterated with seed oils) is relatively low in PUFA and acceptable in small amounts. However, it is still predominantly monounsaturated rather than saturated, so it should not replace coconut oil or butter as a primary fat.

• Avocados

Better than nuts or seeds, but still higher in unsaturated fat than Peat preferred. If your goal is reducing stored PUFA to improve thyroid function, he suggested prioritizing fully saturated fats instead.

• Macadamia Nut Oil

The only nut oil generally considered acceptable because macadamia nuts have the lowest PUFA content of any common nut. Still a secondary choice behind coconut oil, butter, and tallow.

• Well-Cooked Leafy Greens

Peat mentioned that boiling greens like collards or kale for a long time (45 minutes or more) and discarding the cooking water removes many of the goitrogens and oxalates. The broth itself contains vitamin K and magnesium and can be consumed. The solid fiber is generally discouraged.

• Cooked Squash

Winter squash (butternut, acorn) and zucchini, when well cooked, are tolerated by many people. These are lower in anti-nutrients than cruciferous vegetables but still not a primary food in this framework.

• Yogurt (Plain, Full-Fat)

Peat cautioned that yogurt is high in lactic acid, which the liver must convert back into glucose through the Cori cycle. For someone with an already sluggish metabolism, this adds an unnecessary burden. Milk and cheese are preferred for their calcium and protein without the lactic acid load. If you do eat yogurt, small amounts of plain full-fat yogurt are the least problematic form.

• Oats (Occasional)

Not a staple in this framework. Like all grains, oats contain anti-nutrients and are starch-heavy. Peat preferred fruit sugar over any grain-based carbohydrate. If consumed, well-cooked oatmeal with plenty of butter and sugar is the most tolerable form.

---

FOODS TO AVOID

This list reflects foods Peat specifically and repeatedly warned against in his published work.

• Seed Oils and Vegetable Oils

Soybean oil, canola oil, corn oil, sunflower oil, safflower oil, cottonseed oil, grapeseed oil, peanut oil, sesame oil, rice bran oil. These are high in PUFA and were one of Peat's most consistent targets. He linked them to thyroid suppression, lipid peroxidation, inflammation, and immune dysfunction.

• Fish Oil Supplements

Despite mainstream promotion, Peat viewed concentrated fish oil as highly unstable and immunosuppressive. He distinguished between eating a small amount of low-fat white fish (acceptable) and taking concentrated fish oil capsules (not recommended).

• Poultry Fat

Chicken and turkey fat are significantly higher in PUFA than ruminant fat. Peat suggested that if you eat poultry, remove the skin and visible fat, and avoid cooking in poultry drippings.

• Pork Fat (Lard)

Pork fat is relatively high in PUFA compared to ruminant fats. Lean pork in small amounts is less concerning than cooking with lard.

• Nuts and Seeds

Most nuts and seeds (almonds, walnuts, pecans, sunflower seeds, flax seeds, chia seeds, hemp seeds, pumpkin seeds) are high in PUFA. Peat consistently advised against them.

• Whole Grains, Beans, and Legumes

Peat discussed the gut-irritating properties of grains and legumes, including their lectins, phytic acid, and indigestible starches that promote bacterial fermentation and endotoxin production.

• Soy Products

Soy contains phytoestrogens (isoflavones) that Peat identified as anti-thyroid and estrogenic. This includes tofu, tempeh, soy milk, soy protein isolate, and edamame.

• Raw Cruciferous Vegetables

Raw broccoli, cauliflower, kale, cabbage, and Brussels sprouts contain goitrogens that can suppress thyroid function. Peat noted that thorough cooking reduces but does not eliminate these compounds.

• High Fructose Corn Syrup

Despite his positive view of sucrose and fruit-derived fructose, Peat distinguished these from high fructose corn syrup (HFCS), which is industrially produced and often consumed in the context of nutritionally empty processed foods.

• Under-Ripe Fruit

Peat noted that unripe fruit contains more starch and fewer simple sugars, and can irritate the gut. Fruit should be eaten fully ripe.

• Processed Foods with Additives

Carrageenan, gums (guar, xanthan, gellan), artificial sweeteners, and other common food additives were discussed negatively in Peat's work for their potential to irritate the gut or disrupt metabolism.

---

FREQUENTLY ASKED QUESTIONS

Q: Why did Ray Peat recommend sugar when most health advice says to avoid it?

A: Peat distinguished between sugar in the context of a nutrient-rich diet and sugar in the context of processed junk food. In his articles, he explained that sucrose and fructose from fruit and simple sweeteners replenish liver glycogen, which is essential for converting thyroid hormone T4 to the active T3 form. When liver glycogen runs low, the body releases stress hormones like cortisol and adrenaline to mobilize fuel from tissues. Adequate sugar intake, paired with protein and saturated fat, prevents this stress response. He was not recommending candy bars. He was recommending orange juice, ripe fruit, and sugar in coffee alongside meals rich in dairy, eggs, and gelatin.

Q: Is chicken okay on the Ray Peat diet?

A: Peat's concern with chicken was primarily about its fat. Poultry fat is significantly higher in polyunsaturated fatty acids than ruminant fat (beef, lamb, bison). He did not say chicken meat itself is toxic, but he recommended removing the skin and visible fat if you eat it, and not using chicken drippings as a cooking fat. Lean chicken breast in small amounts, cooked in butter or coconut oil, is a practical compromise, though ruminant meats and seafood remain the preferred protein sources.

Q: Can I eat pork?

A: Similar to chicken, the concern is the fat composition. Pork fat (lard) has a higher PUFA content than beef tallow or lamb fat. Lean pork cuts in moderation, cooked in saturated fat, are less of an issue than regular consumption of fatty pork products like bacon or sausages cooked in their own grease.

Q: What about yogurt and kefir?

A: Peat cautioned against yogurt and other high-lactic-acid fermented dairy. The liver must expend energy converting lactic acid back into glucose via the Cori cycle. For people with an already compromised metabolism, this adds unnecessary metabolic burden. He preferred milk and aged cheese, which provide calcium and protein without the lactic acid load. If you tolerate yogurt well and your metabolism is healthy, small amounts are unlikely to be a major issue, but it is not a staple in this framework.

Q: Are avocados okay?

A: In moderation. Avocados are lower in PUFA than nuts and seeds, but they still contain a meaningful amount of unsaturated fat. Peat suggested that people who are actively trying to reduce stored polyunsaturated fats to improve thyroid function should prioritize fully saturated fats (coconut oil, butter, tallow) over avocado.

Q: What about bananas?

A: Peat mentioned bananas occasionally but did not emphasize them the way he emphasized citrus and tropical fruits. Ripe bananas are acceptable as a fruit source, though they are starchier than oranges or grapes. The riper the banana (spotted, soft), the more of the starch has converted to sugar, making it a better fit.

Q: Is rice acceptable?

A: White rice is considered one of the "least bad" grains because the bran and hull (which contain most of the anti-nutrients) have been removed. However, Peat still preferred fruit sugar over any starch. White rice, well-cooked and eaten with butter, is a grey-area food, not a staple.

Q: Can I drink alcohol?

A: Peat was not a proponent of alcohol. He discussed its estrogenic effects and its burden on the liver. Occasionally, he acknowledged that small amounts of certain drinks (like dry wine) are less harmful than others, but alcohol was not something he encouraged in a health-promoting context.

Q: What about beans and lentils?

A: Peat consistently advised against legumes. They contain lectins, phytic acid, and indigestible starches that feed intestinal bacteria and increase endotoxin production. Even with extensive soaking and cooking, he considered them inferior to fruit, dairy, and animal protein as food sources.

Q: Is coconut milk or coconut cream acceptable?

A: Coconut fat is highly saturated and was one of Peat's most recommended fats. Coconut milk and coconut cream are acceptable, though you should check labels for guar gum and other additives. Brands with just coconut and water are preferable.

Q: Why is the raw carrot salad so important?

A: Peat discussed the raw carrot's unique fiber structure in multiple articles and interviews. Unlike most vegetable fibers, the fiber in raw carrot is not easily fermented by intestinal bacteria. Instead, it acts as an intestinal antiseptic, binding bacterial endotoxin and helping the body excrete excess estrogen through the bowel rather than reabsorbing it. The coconut oil and vinegar dressing enhances this antibacterial effect. He recommended it as a daily practice for improving gut health, lowering estrogen, and reducing inflammation.

Q: What kind of milk is best?

A: Peat discussed milk extensively and generally recommended regular pasteurized whole milk from cows, noting that organic or grass-fed is preferable when available. He did not object to skim milk for those trying to reduce overall fat intake (particularly stored PUFA), as the protein and calcium are the primary benefits. He cautioned against ultra-pasteurized (UHT) milk due to protein denaturation from the high-heat processing. Raw milk was acceptable if from a trusted source, but he did not insist on it.

Q: Is dark chocolate okay?

A: Yes, provided it is made with cocoa butter (a saturated fat), sugar, and cocoa. Avoid chocolate products that list soy lecithin, vegetable oil, or milk substitutes high in additives. High-quality dark chocolate is a source of magnesium, copper, and protective saturated fat.

Q: Can I eat fruit all day or is there a limit?

A: Peat did not prescribe rigid quantities. His general principle was that fruit should be eaten with protein and fat (for example, orange juice with cheese or eggs) to maintain stable blood sugar. Eating large amounts of fruit juice on an empty stomach without protein or fat can cause blood sugar fluctuations in some people. The goal is to keep liver glycogen replenished and stress hormones low, not to eat unlimited sugar in isolation.

Q: What about protein powders?

A: Peat was generally skeptical of processed protein powders, many of which contain gums, artificial sweeteners, seed oils, or soy. Hydrolyzed collagen or plain gelatin powder were the exceptions, as these provide glycine and proline to balance muscle-meat amino acids. Whey protein isolate from a clean source (no additives) is tolerable for some people, but whole food protein from milk, cheese, eggs, and shellfish is preferred.