How Much Collagen Should You Take Per Day?

Last updated: August 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy

2.5–10 g of hydrolysed collagen peptides daily, depending on the goal. Skin trials often use 2.5–5 g of specific bioactive peptides; joint and general trials commonly use 10 g. Undenatured type II collagen is entirely different — 40 mg, not grams.

Peptides versus UC-II

Hydrolysed collagen peptides are deliberately broken into small fragments that absorb and appear to signal fibroblasts and chondrocytes to increase matrix production. Undenatured type II collagen keeps its native structure and works through oral tolerance — an immunological mechanism that dampens the immune response against joint cartilage. That is why 40 mg works for one and 10 g for the other.

Matching the dose to the goal

Skin hydration and elasticity: 2.5–5 g of specific bioactive peptides, which is what most positive skin trials used. Joint pain in exercising adults: 10 g. Bone density in postmenopausal women: 5 g of specific peptides. Joint osteoarthritis via oral tolerance: 40 mg UC-II, which must stay undenatured so do not add it to hot drinks.

The protein accounting point

Collagen is not a complete protein — it lacks tryptophan and is low in leucine. If you take 10 g and count it as 10 g of your daily protein target, you have effectively removed that amount from what is available for muscle. Count it separately.

Key ingredients to understand

The ingredients most relevant to this question, with what the evidence actually supports:

• Collagen Peptides — Hydrolysed collagen peptides have some of the better evidence in the supplement market for skin hydration and elasticity, and moderate evidence…
• Marine Collagen — Marine collagen comes from fish skin and scales, is predominantly type I — the type that dominates skin — and has smaller peptides that may…
• Collagen (Hydrolysed Peptides) — Collagen peptides are the most popular skin and joint supplement. There is some genuine trial evidence for modest improvements in skin hydration…
• Vitamin C — Vitamin C is an essential antioxidant nutrient needed for immunity, collagen and iron absorption. For colds, regular intake may slightly shorten…

Frequently asked questions

Can I take more than 10 g?

There is no evidence of additional benefit and it adds calories and cost.

Marine or bovine?

Marine is type I dominant and often preferred for skin; bovine is cheaper. Head-to-head evidence is limited.

Do I need vitamin C with it?

Vitamin C is a cofactor for collagen synthesis. Most people are not deficient, so it is sensible rather than essential.

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