P21 10 mg vial
- Bulk Peptide Supply$75Listed price · deal not verifiedCOA tested Jun 27, 2026
P21 is commonly sold or discussed for focus, memory, mood, and other cognitive goals.
Also known as p-21 · p21
Current picks · Nov 14, 2026
Up to three of the lowest effective prices per exact product among vendors that passed the trust floor, were in stock and checked within 72 hours, and have a COA on file for that product and strength tested within 12 months. Affiliate relationships never affect picks or their order.
Same format. Same amount.
1 of 2 exact products have at least one pick. Vendor counts reflect the current price observations. Testing records for every vendor and strength: P21 COAs →
What it is
P21 is commonly sold or discussed for focus, memory, mood, and other cognitive goals.
This label describes the available research record, not whether the compound is safe or effective for an individual.
Research context
5 registered studies were found under this name in the current review. Each study still needs to be checked for the exact compound identity, population, endpoints, and results.
Search indexed research for this compound ↗Market context
P21 is commonly sold or discussed for focus, memory, mood, and other cognitive goals. That describes market demand, not proof that the compound is safe or effective.
Market demand and online discussion do not establish product quality, safety, or effectiveness.Vendor directory
Grades describe the vendor record overall, not a test of every product. Lowest prices are effective single-package prices across formats; open a comparison for the exact product.
| Vendor | Grade | Offers | In stock | Lowest effective package |
|---|---|---|---|---|
| Bulk Peptide Supply | Grade B+ | 1 | 1 | $75 · 10 mg vialObserved Nov 14, 2026 |
| Core Peptides | Grade B+ | 1 | 1 | $116 · 5 mg vialEarlier observation Oct 20, 2026 |
| Simple Peptide | Grade B | 1 | 1 | $198 · 10 mg vialEarlier observation Sep 27, 2026 |
| Paramount Peptides | Grade B | 1 | 1 | $127.50 · 10 mg vialObserved Nov 14, 2026 |
| Rescue Research | Grade B | 1 | 1 | $89.99 · 10 mg vialEarlier observation Oct 18, 2026 |
| RUO | Grade B | 1 | 0 | $38 · 5 mg vialObserved Nov 14, 2026 · out of stock |
| Tydes | Not graded | 1 | 0 | $74.99 · 10 mg vialObserved Nov 14, 2026 · out of stock |
3 tracked vendors list P21 without a current offer: Nationwide Peptides (Grade B+), Swiss Chems (Grade C), Atomik Labz (Not graded).
Sources and review
Last editorial review: Aug 30, 2026. Sources support the compound guide only and do not affect vendor grades.