REGEN
Get REGENGet Now
LibraryToolsNotesBlogFAQ

Thymosin Alpha-1 Side Effects and Safety

Reported Thymosin Alpha-1 side effects, contraindications, and safety signals.

RE
Compiled from published research · Continuously updated

Established International Safety Record

Given decades of use as an approved drug abroad, Thymosin Alpha-1 has a comparatively well-characterized safety profile for a peptide in this catalog — commonly reported effects include mild injection-site irritation. As an immune-activating compound, it's contraindicated in organ transplant recipients on immunosuppressive therapy (it could counteract the immunosuppression) and treated with caution in autoimmune conditions. Pregnancy is a precautionary contraindication.

Contraindications

  • pregnancy
  • organ transplant recipients on immunosuppressive therapy
  • known hypersensitivity

References

  1. Thymosin-α1 for people with chronic hepatitis B (Cochrane Review CD014610) · Htet NH, et al. · 2022
All Thymosin Alpha-1 sections

Oxytocin

longevity & healthspanBgrade

A naturally occurring nonapeptide — FDA-approved as Pitocin for labor, and separately studied off-label (intranasal) for social bonding and stress research.

SS-31 (Elamipretide)

longevity & healthspanBgrade

A mitochondria-targeting tetrapeptide, FDA-approved in September 2025 for Barth syndrome — a real approval in one narrow rare disease, not a general muscle or longevity drug.

Humanin

longevity & healthspanCgrade

A mitochondrial-derived peptide discovered protecting neurons from Alzheimer's-linked toxicity — cell and rodent data only, no human trial exists.

Put the whole protocol
in one place.

Download nowGet Now