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Moderate evidenceJoints & skin

Collagen Peptides

Hydrolyzed collagen protein. Growing evidence for skin elasticity and hydration; early positive signals for joint comfort in active people.

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What the science says

  • Improved skin elasticity and hydration Moderate evidence

    Randomized placebo-controlled trials show measurable improvements in skin elasticity and hydration after 8+ weeks of collagen peptides. Trials are often industry-funded, but results are consistent across studies.

  • Joint comfort in athletes Limited evidence

    A randomized trial in athletes with activity-related joint pain found modest pain reduction with 10 g/day of collagen hydrolysate. Evidence is promising but still thin.

Dosage & safety

Studied dose2.5–15 g/day of hydrolyzed collagen peptides; skin studies typically use 2.5–10 g/day for at least 8–12 weeks.
SafetyVery safe — it is essentially a protein. Not a complete protein (lacks tryptophan), so it doesn't replace dietary protein.

How to take it

TimingTiming does not matter — claims about dosing an hour before training rest on very thin evidence.
With food?With or without food; it dissolves in anything, hot or cold.
Worth knowingIt counts toward your daily protein but lacks tryptophan, so treat it as an addition to complete protein, not a replacement for it.

Frequently asked questions

Does collagen work for skin?

The evidence for collagen and skin is moderate: randomized placebo-controlled trials show measurable improvements in skin elasticity and hydration after 8+ weeks of collagen peptides. Many trials are industry-funded, but the results are consistent.

How much collagen per day?

Collagen peptides are used at 2.5–15 g/day; skin studies typically use 2.5–10 g/day for at least 8–12 weeks. Timing does not matter, and collagen dissolves in hot or cold drinks.

Does collagen help joint pain?

Possibly, but the evidence is limited: one randomized trial in athletes with activity-related joint pain found modest pain reduction with 10 g/day of collagen hydrolysate.

Can collagen replace protein in my diet?

No. Collagen counts toward your daily protein but lacks tryptophan, so treat collagen as an addition to complete protein, not a substitute.

Scientific references

Where to buy

Vital Proteins, Collagen Peptides, Unflavored, 20 oz (567 g)

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