Most popular
Collagen
Also called: collagen peptides, hydrolysed collagen, marine collagen, fish collagen drinks
Protein from animal skin, bones or fish scales, sold as hydrolysed collagen peptides.
- Why people take it
- Skin, hair, nails and joints.
- What the evidence says
- Some studies show small improvements in skin elasticity and joint pain, but many are funded by makers. The body breaks collagen down into amino acids like any other protein.
- Be careful
- Not vegetarian. Choose a tested brand; some collagen products have been found with heavy metals.
- In food
- Bone broth, chicken and fish with skin; any protein-rich food provides the building blocks.
Other most popular
Common questions
What is Collagen?
Protein from animal skin, bones or fish scales, sold as hydrolysed collagen peptides.
Why do people take Collagen?
Skin, hair, nails and joints.
Does Collagen work?
Some studies show small improvements in skin elasticity and joint pain, but many are funded by makers. The body breaks collagen down into amino acids like any other protein.
Is Collagen safe?
Not vegetarian. Choose a tested brand; some collagen products have been found with heavy metals.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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