Chicken feet: a collagen food whose collagen evidence comes from powders

The collagen that makes chicken feet famous has been tested almost only as a supplement powder. A meta-analysis of 69 placebo-controlled trials in people with hand, hip or knee osteoarthritis found collagen hydrolysate among seven supplements with large short-term pain relief, and none of the supplements had a clinically important effect on pain or function at medium or long-term follow-up. In a randomized trial of 200 adults aged 50 or older with joint pain, a daily collagen hydrolysate supplement for 6 months gave 51.6 percent responders against 36.5 percent on placebo, and we have no card that sets an upper limit for collagen supplements. We found no trial of whole chicken feet or chicken feet broth on any outcome. The EU refused to authorize a claim that collagen hydrolysate supports joint cartilage, joint mobility or skin, which means the evidence did not meet its bar when assessed. As food, boiled chicken feet give 19.4 g of protein and 84 mg of cholesterol per 3.5 oz (100 g) in a single USDA record, and the US dietary survey counts one foot as 35 g with the bone included. The feet contain bone, and we have no data on swallowed bone fragments or on young children, so nothing here shows that chicken feet, or a broth that may hold bone pieces, are safe to give a young child.

The numbers, per 3.5 oz (100 g)

As people eat it, per 3.5 oz (100 g)

How much is actually in it

• USDA lists boiled chicken feet at 19.4 g of protein, 84 mg of cholesterol and 86 mcg of folate per 3.5 oz (100 g). — USDA SR Legacy food Chicken, feet, boiled (FDC 171119), Poultry Products (n = 1 record) Evidence E source
  Protein 19.4 g, cholesterol 84 mg, folate 86 mcg per 3.5 oz (100 g)
• A 2026 review reports that chicken feet hold 18 to 23 g of protein per 3.5 oz (100 g) raw weight, much of it collagen. — chicken feet composition data compiled from laboratory analyses Evidence D source
  Protein, mostly collagen, 18-23 g per 3.5 oz (100 g) wet weight

What a real portion looks like

• The US dietary survey weighs one chicken foot at 35 g and an unspecified serving at 85 g. — USDA FNDDS survey food Chicken feet (code 24198500, fdc_id 2706085), WWEIA Chicken, whole pieces (n = 1 record) Evidence E source
  1 foot = 35 g; quantity not specified = 85 g

What your body absorbs

• In 8 older men, 20 g of a collagen and milk protein blend raised blood leucine less than milk protein alone (113 vs 152 uM) yet muscle protein synthesis rose equally. — healthy older men, 71 years on average, single feeding (n = 8) Evidence B source
  Plasma leucine 113 vs 152 uM; MPS fed 0.042 to 0.085 %/h (blend) vs 0.039 to 0.081 %/h (milk)

What cooking and storage change

• Laboratory data cited in a 2026 review put boiled and ground chicken feet porridge at about 10.4% protein and 611 mg calcium per 3.5 oz (100 g). — prepared chicken feet porridge (boiled and ground), Indonesia Evidence D source
  Per 100 g: 10.4% protein, 611.2 mg calcium, 0.85 mg iron, 1.08 mg zinc, 284.5 mg phosphorus
• In people eating cooked collagen-rich fish meat, most blood collagen peptides reached about 30% of the level seen after an equal dose of collagen hydrolysate. — healthy Japanese adults after cooked shark meat vs collagen hydrolysate Evidence C source
  Plasma AUC of most collagen di- and tripeptides about 30% of hydrolysate; about 30% of meat collagen released by pepsin and pancreatin

What it does to your health

• Lab and animal data suggest that chicken feet proteins can be turned into peptides that inhibit ACE, a blood pressure enzyme. — animal studies of chicken feet protein hydrolysates Evidence D source
  ACE inhibition, better vascular function, higher antioxidant levels in animals; no human effect size given
• A meta-analysis of 69 trials found collagen hydrolysate among supplements with large short-term pain relief in osteoarthritis, with no clinically important effect at medium or long term. — patients with hand, hip or knee osteoarthritis in randomized placebo-controlled trials (n = 69 trials) Evidence A source
  Effect size above 0.80 for pain at short term; no clinically important effect at medium or long term; evidence quality very low
• In an RCT of 200 adults aged 50 plus with joint pain, 1200 mg a day of collagen hydrolysate for 6 months gave 51.6% responders vs 36.5% on placebo. — adults aged 50 or older with joint pain of at least 30 mm VAS (n = 200) Evidence B source
  Responders 51.6% vs 36.5% at 6 months (p<0.05); no difference at 3 months (44.1% vs 39.6%)
• A systematic review of 11 studies with 805 patients included 8 that used collagen hydrolysate at 2.5 to 10 g a day for 8 to 24 weeks for pressure ulcers, xerosis, skin aging and cellulite. — adults in randomized placebo-controlled dermatology trials (n = 805) Evidence A source
  8 of 11 studies used collagen hydrolysate 2.5-10 g/day for 8-24 weeks; outcomes not quantified in the quoted sentence
• In 56 adults with overweight or obesity, 10 g a day of pork collagen hydrolysate for 4 weeks did not improve glucose control. — men and women with overweight or obesity (n = 56) Evidence B source
  Daytime glucose AUC unchanged (95% CI -5.1 to 30.0 mmol/(L*h)); small rises in glycemic variability, fasting insulin and HOMA-IR

Safety, limits and interactions

• A case report describes a 13-year-old boy who developed a reversible brain syndrome (PRES) after eating a chicken feet dish, likely through food poisoning. — one 13-year-old boy, China (n = 1) Evidence D source
  Headache, vomiting, altered consciousness; imaging normal by day 8 after fluids and mannitol
• The CDC lists bones in meat or fish among potential choking hazards for young children. — Infants and young children (n = -) Evidence E source
  Listed as food to avoid for young children (choking risk)

What people believe that the data does not support

• The EU refused to authorize a claim that collagen hydrolysate supports joint cartilage, joint mobility and skin connective tissue. — EU health claim application for collagen hydrolysate Evidence E source
  Claim status non-authorized

Who this works differently for

• In a South African farm-worker community, relying on cheaper food such as chicken feet was among the two most common food-coping strategies. — women 18 to 57 responsible for household food, farm-worker community, Fouriesburg, South Africa Evidence C source
  Chicken feet named among cheaper foods used under food stress

What is still unknown

• How well people absorb the bioactive peptides from chicken feet collagen has not been worked out, per a 2026 review. — chicken feet collagen peptides Evidence D source
  Human bioavailability unknown

The bottom line

How much of that collagen reaches your blood has not been worked out for chicken feet, and a 2026 review says so directly. The nearest human data come from cooked shark meat. In healthy Japanese adults, most collagen peptides in the blood reached about 30 percent of the level seen after the same amount of collagen taken as hydrolysate, and shark is a different animal, so read this as a hint. In 8 older men, a 20 g blend of collagen and milk protein raised blood leucine to 113 against 152 uM for milk protein alone, in a single meal with a blend rather than pure collagen. Collagen did not help blood sugar either. In 56 adults with overweight or obesity, 10 g a day of pork collagen hydrolysate for 4 weeks left free-living glucose unchanged and slightly raised fasting insulin. Blood pressure claims for chicken feet rest on animal studies of peptides made from their protein, with no human effect size behind them. A boiled and ground chicken feet porridge analyzed in Indonesia held about 611 mg of calcium per 3.5 oz (100 g), a figure cited secondhand in a review, and it likely depends on the bone being ground into the porridge. A review of 11 skin studies with 805 patients included 8 in which studies used collagen hydrolysate powder at 2.5 to 10 g a day for 8 to 24 weeks. That is a study dose, not a serving of feet and not a tested safe amount. On safety, one case report describes a 13-year-old boy in China with a reversible brain syndrome after eating a chicken feet dish, attributed to food poisoning of that dish rather than to chicken feet as such. We have no study on pregnancy, on young children, on swallowed bone fragments or on drug interactions. Chicken feet are sold and weighed with their bones in, so this page cannot tell you they are safe for a young child, whole or as broth. In the US, supplements do not go through FDA approval the way medicines do, so anyone who takes medication, is pregnant or has a chronic illness should talk to a doctor before taking one. In a South African farm-worker community, chicken feet were one of the cheaper foods households relied on when food ran short.

Sources

1. chfe-r6-01 · food composition dataset
   Chicken, feet, boiled, FDC 171119 (sr_legacy): Protein 19.4 G, Cholesterol 84 MG, Folate 86 UG per 100 g
   USDA SR Legacy, Chicken, feet, boiled, FDC 171119 · checked 2026-09-30
2. chfe-r6-03 · systematic review of composition data
   Chicken feet are composed of skin, bones, muscles, and connective tissues and are characterized by a high protein content, particularly collagen, ranging from 18 to 23 g per 100 g of wet weight (Bravo et al., 2023).
   Poult Sci, 2026 · checked 2026-09-30
3. chfe-r6-02 · food survey dataset
   Chicken feet, FNDDS code 24198500, fdc_id 2706085: 1 foot 35 g; Quantity not specified 85 g
   USDA FNDDS 2021-2023, Chicken feet, fdc_id 2706085 · checked 2026-09-30
4. chfe-r6-08 · randomized trial
   MP resulted in a greater increase in plasma leucine (MP mean: 152 ± 6 μM, CP+MP mean: 113 ± 4 μM (Feed P < 0.001) and EAA (MP mean: 917 ± 25 μM, CP+MP mean: 786 ± 15 μM (Feed P < 0.01) than CP+MP.
   Clin Nutr, 2021 · checked 2026-09-30
5. chfe-r6-04 · systematic review of composition data
   Juliani et al., 2023a, stated that nutritional analyses of prepared chicken feet products, such as porridge produced through boiling and grinding, revealed that per 100 g, they contain approximately 10.4% protein, 611.2 mg calcium, 0.85 mg iron, 1.08 mg zinc, and 284.5 mg phosphorus
   Poult Sci, 2026 · checked 2026-09-30
6. chfe-r6-07 · human feeding study
   After ingestion of cooked shark meat, nine collagen di- and tripeptides were detected in plasma and the area under the curve of most peptides, except for Hyp-Gly and Pro-Hyp-Gly, was ∼30% of that after ingestion of collagen hydrolysate containing an equivalent amount of collagen.
   J Agric Food Chem, 2019 · checked 2026-09-30
7. chfe-r6-05 · review of animal studies
   Regarding cardiovascular health, animal studies indicated that proteins extracted from chicken feet can be converted into peptides capable of inhibiting angiotensin-converting enzyme, improving vascular function, and increasing antioxidant levels in the body, mechanisms that contribute to blood pressure reduction (Bravo et al., 2023).
   Poult Sci, 2026 · checked 2026-09-30
8. chfe-r6-09 · meta-analysis
   Of 20 supplements investigated in 69 eligible studies, 7 (collagen hydrolysate, passion fruit peel extract, Curcuma longa extract, Boswellia serrata extract, curcumin, pycnogenol and L-carnitine) demonstrated large (effect size >0.80) and clinically important effects for pain reduction at short term. ... Supplements had no clinically important effects on pain and function at medium-term and long-term follow-ups.
   Br J Sports Med, 2018 · checked 2026-09-30
9. chfe-r6-10 · randomized trial
   At 6 months, the proportion of clinical responders to the treatment, according to VAS scores, was significantly higher in the collagen hydrolysate (CH) group 51.6%, compared to the placebo group 36.5% (p<0.05).
   Complement Ther Med, 2012 · checked 2026-09-30
10. chfe-r6-11 · systematic review
    Eleven studies with a total of 805 patients were included for review. Eight studies used collagen hydrolysate, 2.5g/d to 10g/d, for 8 to 24 weeks, for the treatment of pressure ulcers, xerosis, skin aging, and cellulite.
    J Drugs Dermatol, 2019 · checked 2026-09-30
11. chfe-r6-12 · randomized trial
    Four-week collagen hydrolysate intake did not change free-living glucose concentrations, but increased GV, postprandial glucose AUC, fasting insulin, HOMA-IR, and HOMA-β.
    Clin Nutr, 2025 · checked 2026-09-30
12. chfe-r6-14 · case report
    Here, we report a 13-year-old boy who presented with PRES following the consumption of palmatum (a chicken feet dish).
    J Int Med Res, 2020 · checked 2026-09-30
13. sf-choke-4 · agency advice
    Bones in meat or fish.
    CDC, Infant and Toddler Nutrition: Choking Hazards · checked 2026-10-08
14. chfe-r6-13 · EU claims register
    POL-HC-6963 Collagen hydrolysate Contributes to the functioning of cartilage building cells. Supports the (natural) regeneration of joint cartilage. Stimulates the build-up of joint cartilage. Contributes to improved joint functioning and joint mobility. Contributes to joint comfort. Provides the building blocks (peptides) for the biosynthesis of cartilage. Provides strength, flexibility and support to skin connective tissues, ligaments, tendons, bones and other parts of the body. Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-6963, snapshot 2026-09-21 · checked 2026-09-30
15. chfe-r6-15 · cross-sectional survey
    The two most common FCS used were relying on cheaper food (chicken feet, diluted soya-mince soup) or less preferred food (meat bones) and employing food-seeking strategies (gathering wild foods), followed by consumption of seed stock (maize) and reduced portion sizes (protein foods and side dishes), resulting in starch-based diets of poor variety.
    Food Nutr Bull, 2008 · checked 2026-09-30
16. chfe-r6-06 · systematic review
    Other studies confirmed that they serve as an excellent source of antioxidant peptides, while further research is needed to understand their bioavailability in humans and potential industrial applications (Ozturk-Kerimoglu et al., 2023).
    Poult Sci, 2026 · checked 2026-09-30