Thymalin
Thymic peptide studied for immune/longevity effects, mostly in older Russian trials — no rigorous modern human data.
What it does
A thymic peptide studied for immune and longevity effects, mostly in older Russian trials. No rigorous modern human data. Tracked, not recommended.
What the evidence shows
Overall evidence strength: Very low certainty
Who it's for, who should skip
Not available or recommended. Status is gray_zone — not FDA-approved, named by compound in a 2024 FDA warning letter; a Russian approval has no US bearing. Tracked pending rigorous modern human data.
Running it
No dosing protocol is published for this compound — there is no lawful supervised channel for the use this guide covers. What follows is monitoring, expectations, and safety framing only.
- Form
- injectable
Access & cost
Legally unsettled. Access, where it exists at all, runs through a physician — not a consumer purchase. See the status note above.
Last reviewed 27 August 2026. Regulatory status verified 27 August 2026.