Thymosin alpha-1 / LL-37 stack: what's in it

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By Ellum EditorialUpdated October 11, 2026AI use

The short answer

Thymosin alpha-1 / LL-37 stack combines Thymosin alpha-1 and LL-37.

What it is
Immune stack.
What people look into
Skin and hair, aging
Results for one compound don't tell you what the two do together.

The parts

Thymosin alpha-1 Index
Approved outside the US
LL-37 (cathelicidin) Index
Not FDA-approved

Regulatory status by component

Not FDA-approved How we label status

As of October 4, 2026, Thymosin alpha-1 is not FDA-approved for any use and is not on FDA's 503A bulks list. It is approved in Italy. See Thymosin alpha-1 in the Index →
As of October 4, 2026, LL-37 (cathelicidin) is not FDA-approved for any use and is not on FDA's 503A bulks list. See LL-37 (cathelicidin) in the Index →

Status as of October 4, 2026

As a combination: No category as a combination (see components)

Thymosin alpha-1: as of October 4, 2026 · source
LL-37 (cathelicidin): as of October 4, 2026 · source

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The research on Thymosin alpha-1 / LL-37 stack

Key facts

Also known as: ta1 ll-37, immune resilience stack

Parts: Thymosin alpha-1 and LL-37 (cathelicidin)
Route: injectable

References

Status sources

Sources as of October 4, 2026

What this doesn’t establish

Results for one compound don't tell you what the two do together.