Understand the source comparison
Best Peptides for Breastfeeding Support: Evidence Comparison
Collagen Peptides (Hydrolyzed) 2,000–5,000 Da Negligible (enzymatic degradation prevents intact transfer) 3 observational studies, n=127 total, no adverse infant outcomes documented Safe for use. Select marine or bovine sources with third-party purity verifica
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Collagen Peptides (Hydrolyzed)
- 2,000–5,000 Da
- Negligible (enzymatic degradation prevents intact transfer)
- 3 observational studies, n=127 total, no adverse infant outcomes documented
- Safe for use. Select marine or bovine sources with third-party purity verification
- Growth Hormone Secretagogues (MK-677, Ipamorelin, CJC-1295)
- 500–900 Da
- High (paracellular transfer within 2–4 hours of maternal dosing)
- Zero controlled trials, zero observational studies
- Avoid entirely. Defer until infant weaning or use non-peptide alternatives
- Thymic Peptides (Thymalin)
- 3,000+ Da
- Low (size-exclusion limits intact transfer)
- Zero lactation-specific studies
- Insufficient data. Theoretical immune modulation risk outweighs unproven benefit
- Nootropic Peptides (Dihexa, P21, Cerebrolysin)
- 492–5,000 Da
- Variable (Dihexa high risk, Cerebrolysin low risk based on size alone)
- Zero lactation studies across entire category
- Avoid. CNS-active compounds require pediatric safety data before breastfeeding use