§ Same category · Cognitive peptides
P-21 vs PNC-27
Side-by-side price comparison across every tracked vendor. Updated every 4–6 hours.
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P-21
5
vendors tracked
from $9.80/mg
PNC-27
6
vendors tracked
from $8.00/mg
◎ Cheapest $/mg:PNC-27 at $8.00/mg
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 → |
Sort:
Last crawl 2026-05-09Sort:
2026-05-09PNC-27
Tumor-selective membrane-disrupting peptide
Watch
$39.99
$8.00/mg
In stock◎ Best $/mg
B-
Operational$59.00
$11.80/mg
In stock▲ 47.5% vs best
Operational
$138.00
$27.60/mg
In stock▲ 245.1% vs best
| Vendor | Grade | Risk | Price | $/mg | Trend | Stock | |
|---|---|---|---|---|---|---|---|
| Modern Research Peptides (.net) US | B- | Watch | $39.99 ◎ Best $/mg | $8.00 | In stock | Buy with code → | |
| Lab Sourced US | B- | Operational | $59.00 ▲ 47.5% | $11.80 | In stock | Visit → | |
| Core Peptides US | A | Operational | $138.00 ▲ 245.1% | $27.60 | In stock | Visit → |
Sort:
Last crawl 2026-05-09Sort:
2026-05-09About P-21
An 11-mer fragment derived from ciliary neurotrophic factor (CNTF), studied for neurogenesis and cognitive enhancement in preclinical models.
About PNC-27
A fusion peptide containing the MDM2 binding domain of p53 and a membrane-translocating signal, studied for cancer-cell-selective cytotoxicity.