Limited evidenceJoints & skin

Sea Cucumber

A marine animal rich in chondroitin-like glycosaminoglycans, sold for joint pain. The chemistry is plausible but no controlled human trial has ever tested it for joints.

Evidence last reviewed: August 2026

What the science says

Joint pain and osteoarthritis Limited evidence
No randomized or controlled human trial of oral sea cucumber for osteoarthritis or joint pain is indexed in PubMed. The joint claim rests on the fact that sea cucumber body walls contain fucosylated chondroitin sulfate.
Cartilage protection in the lab Limited evidence
A cell-culture study found that an aqueous Stichopus chloronotus extract protected human chondrocytes taken from osteoarthritic cartilage. Chondrocyte cultures are a very early-stage model and do not predict clinical benefit.
Anti-inflammatory compounds Limited evidence
A review of anti-inflammatory agents from marine sources catalogues sea cucumber-derived saponins and glycosaminoglycans among candidate compounds. These remain drug-discovery leads rather than validated supplement ingredients.

Dosage & safety

Studied doseNo studied dose. Products typically supply 500–1,000 mg of dried sea cucumber powder once or twice daily, stated without supporting trial data.

SafetySea cucumber is a food in many cuisines, but it is a marine invertebrate and can trigger allergy in people sensitive to shellfish. Its glycosaminoglycans have anticoagulant activity in the laboratory, so caution is warranted with warfarin or other blood thinners and before surgery. Marine products may accumulate heavy metals depending on source.

Scientific references

Stichopus chloronotus aqueous extract as a chondroprotective agent for human chondrocytes isolated from osteoarthitis articular cartilage in vitro
Mohd Heikal MY, Ahmad Nazrun S, Chua KH — Cytotechnology, 2019
Recent Patents and Discovery of Anti-inflammatory Agents from Marine Source
Kapoor S, Nailwal N, Kumar M — Recent Pat Inflamm Allergy Drug Discov, 2019

Where to buy

View on iHerb

Referral link — this site may earn a commission on purchases.

Related in Joints & skin

Curcumin (Turmeric extract) Moderate evidence
Collagen Peptides Moderate evidence
Glucosamine Limited evidence
Biotin (Vitamin B7) Limited evidence
MSM (Methylsulfonylmethane) Limited evidence
Chondroitin Sulfate Moderate evidence