§ Comparison
Semax vs TB-500
Side-by-side price comparison across every tracked vendor. Updated every 4–6 hours.
Semax
23
vendors tracked
from $2.52/mg
TB-500
25
vendors tracked
from $3.50/mg
◎ Cheapest $/mg:Semax at $2.52/mg
Semax
Nootropic ACTH fragment
Operational
$19.43
$3.89/mg
In stock◎ Best $/mg
B-
Watch$39.99
$8.00/mg
In stock▲ 105.8% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | Stock | |
|---|---|---|---|---|---|---|---|
| Research Peptides Europe EU | A | Operational | $19.43 ◎ Best $/mg | $3.89 | In stock | Buy with code → | |
| Modified Aminos US | B- | Watch | $39.99 ▲ 105.8% | $8.00 | In stock | Visit → |
Sort:
Last crawl 2026-05-04Sort:
2026-05-04TB-500
Actin-binding healing fragment
Operational
$37.79
$7.56/mg
In stock◎ Best $/mg
B-
Operational$40.00
$8.00/mg
In stock▲ 5.9% vs best
Operational
$41.58
$8.32/mg
In stock▲ 10.0% vs best
Operational
$60.00
$12.00/mg
In stock▲ 58.8% vs best
Operational
$78.00
$15.60/mg
In stock▲ 106.4% vs best
Operational
$119.95
$23.99/mg
In stockOn sale▲ 217.4% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | Stock | |
|---|---|---|---|---|---|---|---|
| Research Peptides Europe EU | A | Operational | $37.79 ◎ Best $/mg | $7.56 | In stock | Buy with code → | |
| Peptide Hub US | B- | Operational | $40.00 ▲ 5.9% | $8.00 | In stock | Visit → | |
| ResearchPeptide UK UK | B- | Operational | $41.58 ▲ 10.0% | $8.32 | In stock | Visit → | |
| Ascension Peptides US | B | Operational | $60.00 ▲ 58.8% | $12.00 | In stock | Visit → | |
| Core Peptides US | A | Operational | $78.00 ▲ 106.4% | $15.60 | In stock | Visit → | |
| Nexus Peptides US | B | Operational | $119.95 On sale ▲ 217.4% | $23.99 | In stock | Visit → |
Sort:
Last crawl 2026-05-04Sort:
2026-05-04About Semax
A synthetic heptapeptide based on an ACTH(4-10) fragment. Studied in Russian neurology for neuroprotection and cognitive enhancement.
About TB-500
TB-500 is a synthetic fragment of the naturally-occurring thymosin beta-4 peptide, studied in animal models for soft-tissue repair and inflammation modulation.