Side-by-side comparison

Thymosin Alpha-1 vs LL-37 — Price & Profile Comparison

Thymosin Alpha-1

Cellular Peptide

Immune-modulation research

vs

LL-37

Thymosin Alpha-1

LL-37

Cheapest price

$31.99 /10mg

$55.00 /10mg

Vendors stocking

29

10

Regulatory status

Approved in 30+ countries

Not FDA-approved

Mol. weight

3,108.3 g/mol

—

The short answer

Thymosin Alpha-1 vs LL-37: which to choose

Thymosin Alpha-1 is the cheaper option — roughly $32 vs $55 for the lowest verified listing. Thymosin Alpha-1 is the more widely stocked of the two (29 vendors vs 10).

Price Comparison — 2026

Thymosin Alpha-1

VendorPrice

Amino Club$31.99 /10mgBuy →

Ascension Peptides$37.50 /10mgBuy →

Step One Ventures$39.60 /10mgBuy →

Optimum Formula$40.49 /10mgBuy →

NextGen Peptides$40.50 /10mgBuy →

Puratek Peptides$53.96 /10mgBuy →

+23 more vendors →

LL-37

VendorPrice

Ascension Peptides$55.00 /10mgBuy →

SomaChems$63.99 /10mgBuy →

Peptide Giants$80.08 /10mgBuy →

Premier Research$90.00 /10mgBuy →

Offline Peptides$100.00 /10mgBuy →

BioPure Peptides$113.99 /10mgBuy →

+4 more vendors →

Vendors Carrying Both

9 vendors stock both Thymosin Alpha-1 and LL-37 — convenient if you want to bundle an order.

Ascension PeptidesThymosin Alpha-1: $37.50LL-37: $55.00Visit →

SomaChemsThymosin Alpha-1: $79.98LL-37: $63.99Visit →

Peptide GiantsThymosin Alpha-1: $59.39LL-37: $80.08Visit →

Premier ResearchThymosin Alpha-1: $60.00LL-37: $90.00Visit →

Offline PeptidesThymosin Alpha-1: $72.00LL-37: $100.00Visit →

Chameleon PeptidesThymosin Alpha-1: $81.90LL-37: $126.00Visit →

Particle PeptidesThymosin Alpha-1: $83.24LL-37: $147.96Visit →

CertaPeptidesThymosin Alpha-1: $99.95LL-37: $157.88Visit →

Evolve PeptidesThymosin Alpha-1: $102.00LL-37: $170.00Visit →

Safety Notes

Thymosin Alpha-1

FDA: Approved in 30+ countries

11,000+ patients in 30+ trials; well-tolerated; approved as Zadaxin globally; excellent safety record

LL-37

FDA: Not FDA-approved

Endogenous cathelicidin; naturally occurring; potential pro-inflammatory at very high doses only

Explore Further

Thymosin Alpha-1

Full profile →Cheapest deals →

LL-37

Full profile →Cheapest deals →

All current deals →Browse all peptides →

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