Collagen peptides
Collagen peptides are hydrolyzed collagen sold as a dietary supplement. Randomized trials suggest modest benefits for skin hydration and elasticity, though study quality varies.
What it is
Collagen from fish or cattle broken down into small peptides that dissolve in drinks.
What the evidence shows
In people
Many randomized trials and several meta-analyses report modest improvements in skin hydration and elasticity after 8–12 weeks. Many are industry-funded, and results depend on the specific ingredient.
In animals and labs
Supporting lab work on how collagen peptides are absorbed.
Legal status
Legal as a dietary supplement. Claims must stay within structure and function language.
Dosing
Follow the product label
Supplements and skincare products are used as directed on their label. Choose products with third-party testing, and check with a clinician if you are pregnant, nursing, or take medication.
Known risks
- Allergy risk for fish or bovine sources
- Quality varies; look for third-party testing