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Collagen Peptides

Last reviewed September 28, 2026Part of Collagen
In short

Collagen broken down into small peptides so it dissolves easily in hot or cold drinks. An incomplete protein that lacks tryptophan.

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At a glance

Source
General reference
Bovine, porcine or marine
Amino acids
Published research
High in glycine, proline, hydroxyproline; lacks tryptophan

About collagen peptides

Collagen peptides are popular as a mix-in, but because collagen lacks tryptophan it does not count as complete protein.

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Sources & references

  1. Paul C, Leser S, Oesser S (2019). Significant amounts of functional collagen peptides can be incorporated in the diet while maintaining indispensable amino acid balance. Nutrients 11(5). pubmed.ncbi.nlm.nih.govStudy

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This page is educational and is not medical advice. Talk to a healthcare professional before starting a supplement, especially if you have a medical condition, take medications, or are pregnant or breastfeeding.