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Moderate evidencePerformanceSkin & hair

Collagen peptides

Also called: Hydrolysed collagen, marine collagen

Protein building blocks for skin, joints and tendons. Trials suggest modest benefits for skin elasticity and joint comfort.

Typical amount
2.5–10 g a day
Best time
Same time daily; morning is common · Timing guide
Food
With or without food
Typical course
12 weeks, then review
Is it right for me?

Where to buy

3 products
Also inside 2 other products (combinations and multivitamins)

What is collagen peptides?

Collagen is the main protein in skin, tendons, cartilage and bone. Supplements are broken down (hydrolysed) into small peptides, which may signal the body to make more of its own collagen. Most products are marine or bovine, so they aren't vegetarian. Effects take 8–12 weeks.

Forms. Unflavoured or flavoured powders, drinks and gummies. Marine (fish) or bovine; there's no true vegan collagen.

What it may help with

Evidence grade

Strong: several good human trials. Moderate: some trials, mixed results. Limited: small or early studies. Traditional: long use, little trial evidence.

Safety and interactions

Side effects
Generally well tolerated. Marine collagen is unsuitable for fish allergy.
Who should be careful
Marine collagen: fish allergy; not vegetarian
Stop and call a doctor if
Rash or swelling

Food sources

Bone broth, chicken skin, fish with skin. Vitamin C from food helps the body make collagen.

Common questions

Is there vegetarian collagen?

No. 'Vegan collagen' products contain the building blocks or vitamin C, not collagen itself.

When should I take it?

Any time of day; consistency matters more than timing.

How long until I see results?

Most studies run 8–12 weeks.

For information only, not medical advice. Prices and links are checked by hand and can change; we may earn a small commission on some links. This plan is based on your answers and is not a medical diagnosis. It does not replace advice from your doctor. If you take medicines or have a health condition, check with your doctor before starting any supplement.