§ Same category · Cognitive peptides
Noopept vs P-21
Side-by-side price comparison across every tracked vendor. Updated every 4–6 hours.
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Noopept
3
vendors tracked
from $0.93/mg
P-21
5
vendors tracked
from $9.80/mg
◎ Cheapest $/mg:Noopept at $0.93/mg
Noopept
Peptide-derived nootropic
No current listings at 20mg.
P-21
CNTF-mimetic cognitive peptide
Operational
$116.00
$23.20/mg
In stock◎ Best $/mg
| Vendor | Grade | Risk | Price | $/mg | Trend | Stock | |
|---|---|---|---|---|---|---|---|
| Core Peptides US | A | Operational | $116.00 ◎ Best $/mg | $23.20 | In stock | Buy with code → |
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Last crawl 2026-05-09Sort:
2026-05-09About Noopept
A dipeptide derivative of piracetam studied for memory enhancement and neuroprotection. Technically a pro-drug, but widely sold in peptide stores.
About P-21
An 11-mer fragment derived from ciliary neurotrophic factor (CNTF), studied for neurogenesis and cognitive enhancement in preclinical models.