LL-37 vs Thymosin Alpha-1 (Zadaxin)
Both are used for immunity. Here's how they compare on human evidence, mechanism, safety and availability — in plain English.
| LL-37 | Thymosin Alpha-1 (Zadaxin) | |
|---|---|---|
| Human evidence | ★★☆☆☆ | ★★★☆☆ |
| Legal status | Not Approved | Prescription, Not Approved |
| How it works | Human cathelicidin (CAMP gene) antimicrobial peptide; disrupts microbial membranes and modulates immunity/wound healing. | Immunomodulator activating Toll-like receptors (TLR9/2) and T-cell maturation; approved in ~35 countries for hepatitis B/C and as a vaccine adjuvant. |
| In plain English | A natural antibiotic your own body makes; explored for infections and healing. Very early for supplemental use. | Tunes up the immune system's T-cells — approved in many countries (not the US) for chronic infections and used to bolster immunity. |
| Bottom line | Interesting antimicrobial biology; minimal human supplement data. | Real immunotherapy abroad; investigational in the US. |
| Availability | Not widely approved | Prescription only |
Which is better for immunity?
Thymosin Alpha-1 (Zadaxin) has the stronger human-evidence rating (★★★☆☆ vs ★★☆☆☆), but the right choice still depends on your goal, tolerance and budget.
Full breakdowns: LL-37 · Thymosin Alpha-1 (Zadaxin).
Common questions
Is LL-37 or Thymosin Alpha-1 (Zadaxin) better for immunity?
Thymosin Alpha-1 (Zadaxin) has the stronger human-evidence rating (★★★☆☆ vs ★★☆☆☆), but the right choice still depends on your goal, tolerance and budget.
What's the difference between LL-37 and Thymosin Alpha-1 (Zadaxin)?
LL-37: Interesting antimicrobial biology; minimal human supplement data. — Thymosin Alpha-1 (Zadaxin): Real immunotherapy abroad; investigational in the US.