Collagen Rich Foods

Collagen is synthesized internally by your body, but that synthesis depends on two things: adequate raw materials (specific amino acids) and adequate cofactors (vitamins and minerals). Diet plays a role in providing both, and some foods also provide collagen directly from animal connective tissue. This guide covers both categories: foods that contain collagen, and foods that help your body make more of its own.

Foods That Directly Contain Collagen

Dietary collagen comes exclusively from animal sources — specifically from connective tissue: skin, bones, joints, tendons, ligaments, and cartilage. Plants do not contain collagen (plants make structural proteins like cellulose and lignin, not collagen). The best food sources of collagen are those that traditionally use the most connective tissue-rich parts of animals:

Bone Broth

The gold standard collagen food. Long-simmered bone broth (18–24 hours for beef; 8–12 for chicken; 2–4 for fish) extracts gelatin from connective tissue and cartilage. A well-made beef bone broth that gels when cooled contains approximately 5–10g of collagen per cup. Chicken feet and joints dramatically increase collagen yield. See our full breakdown in how much collagen is in bone broth.

Chicken Feet and Skin

Chicken feet are exceptionally high in collagen because they are largely composed of connective tissue, cartilage, and skin. They are a traditional ingredient in chicken soup in many cultures precisely because they provide body to the broth. Chicken skin is also a meaningful collagen source, providing both glycine and proline directly.

Fish with Skin

Fish skin is a significant source of Type I marine collagen. Eating fish with the skin provides collagen amino acids and is the whole-food basis of marine collagen. The collagen in fish skin is a smaller molecular weight than bovine collagen, which may allow slightly faster digestion and amino acid availability. Kosher fish species (those with fins and scales) are the appropriate choice for those who keep kosher.

Beef Cuts with Connective Tissue

Slow-cooked cuts of beef that have substantial connective tissue — oxtail, short ribs, brisket, chuck roast, shank, and tendons — provide collagen as the connective tissue breaks down during extended cooking. The "falling off the bone" tenderness of these dishes is the result of collagen converting to gelatin, the same compound extracted in bone broth. Traditional braised and slow-cooked Jewish dishes (cholent, tzimmes with brisket, oxtail stew) are excellent collagen-rich meals.

Gelatin (Certified Kosher)

Gelatin is purified partially-hydrolyzed collagen. In its pure form (unflavored gelatin powder), it provides approximately 6g of collagen per tablespoon and gels in liquids when cooled. Unlike Jello (which typically uses pork-derived gelatin and added sugar), certified kosher gelatin is derived from kosher-supervised bovine sources. See our breakdown of collagen in Jello for the full comparison.

Collagen Content by Food Source

Foods That Support Your Body's Own Collagen Production

Beyond foods that directly contain collagen, certain foods support the biochemical pathways your body uses to synthesize its own collagen. This matters because collagen synthesis depends on cofactors and precursors beyond just glycine, proline, and hydroxyproline:

Citrus Fruits (Vitamin C — Essential Cofactor)

Vitamin C is not optional for collagen synthesis — it is biologically required. The enzymes prolyl hydroxylase and lysyl hydroxylase, which convert proline and lysine into their hydroxylated forms (a necessary step for forming stable collagen triple helices), require vitamin C as an electron donor. Without adequate vitamin C, collagen synthesis fails at the molecular level regardless of amino acid availability. Scurvy — the disease of vitamin C deficiency — is literally "collagen synthesis failure."

Best sources: oranges, grapefruits, lemons (50–70mg per serving), red bell peppers (150mg per medium pepper), kiwi (70mg), strawberries (90mg per cup), and broccoli (90mg per cup).

Eggs

Egg whites are exceptionally high in glycine and proline — the two most abundant amino acids in collagen. The yolk contributes vitamin A and lutein, both antioxidants that protect collagen from oxidative degradation. Eggs are one of the most complete collagen-supportive foods because they supply both precursor amino acids and protective antioxidants in a single package.

Leafy Greens

Spinach, kale, Swiss chard, and other leafy greens are rich in:

• Vitamin C: Essential cofactor for collagen synthesis enzymes
• Chlorophyll: Research suggests chlorophyll may stimulate procollagen production in skin cells
• Antioxidants (vitamins C and E): Neutralize reactive oxygen species that activate MMP enzymes (collagen-degrading enzymes)
• Vitamin K: Supports bone matrix collagen structure and calcium deposition

Berries

Blueberries, blackberries, raspberries, and strawberries are high in anthocyanins — polyphenol antioxidants with demonstrated anti-inflammatory effects that help protect existing collagen from degradation. They also provide vitamin C for collagen synthesis. Berries combined with collagen supplementation (in a smoothie, for example) provide both building blocks and protection simultaneously.

Garlic

Garlic contains high sulfur concentrations. Sulfur is required for the formation of collagen crosslinks — the molecular bonds between collagen fibers that give connective tissue its tensile strength. Garlic also contains lipoic acid, a potent antioxidant. Taurine and sulfur from garlic directly support the crosslinking step in collagen maturation.

Zinc-Rich Foods (Pumpkin Seeds, Beef, Chickpeas)

Zinc is a required cofactor for several enzymes in the collagen synthesis pathway, including the procollagen-N-proteinase and procollagen-C-proteinase enzymes that process procollagen into mature collagen. Zinc deficiency is associated with impaired wound healing and reduced collagen production. Best kosher-friendly sources: pumpkin seeds (excellent), beef, chickpeas, and lentils.

Copper-Rich Foods (Sesame Seeds, Cashews, Dark Chocolate)

Lysyl oxidase — the enzyme that crosslinks collagen and elastin fibers to form stable, strong connective tissue — requires copper as a cofactor. Without adequate copper, collagen crosslinks are incomplete, producing weaker connective tissue. Good kosher sources: tahini (sesame paste), cashews, sunflower seeds, and dark chocolate.

Foods That Destroy Collagen: What to Avoid

Just as important as what helps is what harms:

• Sugar and refined carbohydrates: High blood glucose triggers glycation, which cross-links collagen fibers in disorganized ways, making them stiff and degraded. Minimizing refined carbohydrates and added sugars is one of the most impactful dietary changes for long-term collagen preservation.
• Alcohol: Dehydrates skin, inhibits fibroblast collagen synthesis, and increases MMP enzyme activity. Even moderate alcohol consumption has measurable effects on skin collagen.
• Trans fats: Found in processed foods; promote inflammatory signaling that activates collagen-degrading enzymes.
• Excessive caffeine (very high intake): May impair calcium absorption at very high doses, indirectly affecting bone collagen matrix maintenance.

Getting Therapeutic Collagen from Food vs. Supplements

While the foods above genuinely support collagen, the amounts they provide are difficult to match with the doses used in clinical research (5–15g daily of hydrolyzed collagen peptides). To get 10g of collagen from bone broth alone would require drinking 1–2 cups of very well-made broth daily — which requires 18–24 hours of preparation and delivers inconsistent content between batches.

The practical approach most health-conscious individuals use is:

• Diet: Regular consumption of collagen-containing foods (bone broth, fish, slow-cooked meats) and collagen-supporting foods (citrus, eggs, leafy greens, berries)
• Supplements: 10g daily of hydrolyzed collagen peptides for standardized, guaranteed dosing without preparation

The two are complementary, not either/or.

Shop AletaCollagen OU Kosher bovine collagen peptides — 10g per serving, independently tested, tasteless, and completely versatile in coffee, smoothies, soup, or any other beverage. Compare with our OU Kosher marine collagen from tilapia. Learn more about sourcing differences in our bovine vs marine collagen comparison.

For the complete guide to collagen supplementation: The Complete Guide to Kosher Collagen.