Collagen peptides: skin benefits, results & how to take them

Dietary supplement Checked against official sources Oct 16, 2026

Quick facts

What it is: collagen protein broken into small pieces, sold as powders and drinks.
Status: a dietary supplement. The FDA doesn't approve supplements before they're sold.
Evidence: solid. Meta-analyses of randomized trials show better skin hydration and elasticity.
How to take it: by mouth, as directed on the product label.
Bottom line: one of the best-studied peptide supplements for skin.

What is Collagen peptides?

Collagen peptides (hydrolyzed collagen) are collagen protein broken into small pieces, usually from cows, pigs, or fish. They're sold as powders and drinks.

Is Collagen peptides FDA-approved?

Sold as dietary supplements and foods. Under the 1994 DSHEA law, the FDA does not have authority to approve dietary supplements before they are marketed. Manufacturers are responsible for safety and labeling.

How to take collagen peptides: what we know

The trials gave hydrolyzed collagen by mouth, usually daily. One meta-analysis concluded that about 90 days of use improved skin measures (PMID 33742704).
The abstracts we checked don't list one standard amount. Studies used different products and sources (PMID 37432180).
Follow the product label, and check with a clinician if you're pregnant, have kidney disease, or have allergies to the source (fish, bovine, etc.).

What the research shows

Meta-analysis, 2023 (Nutrients, PMID 37432180): 26 RCTs with 1,721 people found improved skin hydration and elasticity vs. placebo. The authors flagged biases in the studies and called for larger trials.
Meta-analysis, 2021 (Int J Dermatol, PMID 33742704): 19 RCTs with 1,125 people (95% women) found favorable effects on hydration, elasticity, and wrinkles.

New to these terms? See the glossary.

Collagen peptides FAQ

Do collagen peptides work for skin?

Yes, in trials. Meta-analyses (26 trials, 1,721 people in one) found improved skin hydration and elasticity compared with placebo.

How long does collagen take to work?

One meta-analysis concluded about 90 days of oral hydrolyzed collagen improved skin measures.

Are collagen supplements FDA-approved?

No. Under DSHEA, the FDA doesn't approve dietary supplements before they're marketed.

Not medical advice. Education only. We don't sell anything or tell you what to take. Label doses are there so you can follow along with your prescriber. Talk to a licensed clinician about your health.

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