What are thymus peptides?
They’re peptides associated with the thymus, a gland that helps immune cells develop. We focus on thymulin and thymosin alpha-1. The broad label doesn’t identify a single treatment or benefit.
Is FTS another name for thymulin?
FTS means serum thymic factor, the peptide chain. In the early zinc experiment, “thymulin” meant that chain joined to zinc in its active form. The names are connected, but the active complex includes the mineral.
Why does zinc keep appearing?
Thymulin needs zinc to be active. In a small human zinc-deficiency study, its activity fell even when blood plasma zinc looked normal. Restoring zinc restored activity. That isn’t evidence that everyone needs zinc supplements.
Does a salt name tell us what works?
No. A chemical name on a listing doesn’t tell you whether its preparation matches an experiment. The foundational work tested activity in cells. A name can’t turn that result into a human treatment claim.
Are thymulin and thymosin alpha-1 the same?
They aren’t. Thymulin has nine amino acids and needs zinc for activity. Thymosin alpha-1 has 28 amino acids; thymalfasin is its man-made counterpart. The comparison keeps their findings separate.
Did thymosin alpha-1 help people survive sepsis?
The larger sepsis trial found no clear reduction in deaths over 28 days. These hospital patients faced sepsis, where the body’s response to infection becomes life-threatening. SciClone Pharmaceuticals, maker of thymalfasin medicine Zadaxin, supported the trial; some authors had also received company fees or grants. It doesn’t answer whether healthy people catch fewer infections.
Does a withdrawn FDA nomination mean approval?
No. The content date on FDA’s safety page is April 22, 2026. Find thymosin alpha-1 in the withdrawn-nominations table, with warnings beside its name.
Withdrawal doesn’t authorize compounding or put it into Category 1. FDA doesn’t give an individual withdrawal date. Thymosin alpha-1 has no FDA approval, and compounded medicines aren’t FDA-approved.