Collagen has moved from beauty aisles into gym bags — and for good reason. Collagen peptides supply amino acids (especially glycine and proline) that support connective tissue. It will not replace protein for muscle building, but it can complement a solid training diet.
What collagen does — and does not do
Reasonable expectations:
- Supports skin elasticity and hydration over 8–12 weeks in studies
- May reduce joint discomfort in some active people when combined with training
- Convenient protein-adjacent supplement (not a complete protein for muscle)
Do not expect: instant wrinkle removal, injury cure, or replacement for physiotherapy.
Marine vs bovine vs clear collagen
- Marine collagen — Type I focused; popular for skin and convenient stick formats
- Bovine collagen — Types I & III; common in powders and gels
- Clear collagen drinks — Light, juice-like; easy to drink post-session without a heavy shake
How much to take
Most research uses 2.5–15 g collagen peptides daily. Follow your product label — sticks and gels often deliver a fixed dose per serving.
Our GymStack collagen picks
Best clear drink
BioTechUSA
Clear Collagen - Strawberry-Cranberry - 308g
Best marine sticks
Applied Nutrition
Marine Collagen - Strawberry Raspberry - 300g
Best gel format
Applied Nutrition
Marine Collagen - Strawberry Raspberry - 300g
Best capsules
BioTechUSA
Clear Collagen - Strawberry-Cranberry - 308g
Pair collagen with adequate protein and creatine for training outcomes — browse collagen and protein at GymStack.
Not suitable as sole protein source for muscle building. Contains fish/marine sources where labelled — check allergens.