compounds / p-21
P-21 price comparison
A neurotrophic peptide (P021) studied in preclinical research on cognition and BDNF-pathway models.
cheapest (first-party)
$7.50/mg
medianThe middle value in a sorted list — half the prices sit above it, half below.
$11.90
highest
$23.20
spreadThe highest $/mg divided by the lowest for the same compound — how widely its price varies across vendors.
3.1×
first-party vendors
10
Fair-price band · 10 first-party vendors · $/mg
median $11.90
$7.50cheapest $23.20highest
The priciest vendor charges 3.1× the cheapest — buying blind on P-21 can cost up to $15.70/mg more.
first-party prices captured 16m ago
Compare by exact vialThe small sealed glass container a compound ships in. size: 5mg (4 vendors)10mg (4 vendors)
| # | Vendor | Product | Size | Price | $/mg | Trend | Code | |
|---|---|---|---|---|---|---|---|---|
| 1 | Tydes since 2023 | P21 (P021) 10mg first-party · captured 23m ago · earns pepmg $0 · source ↗ · COAs ↗ | 10mg | $74.99 | $7.50 | · | — | buy → |
| 2 | RUO.bio since Jan 2025 | P-21 5mg first-party · captured 19m ago · earns pepmg $0 · source ↗ | 5mg | $38.00 | $7.60 | · | — | buy → |
| 3 | Atomik Labz since 2024 | P-21 – 12mg first-party · captured 23m ago · earns pepmg $0 · source ↗ | 12mg | $119.00 | $9.92 | · | — | buy → |
| 4 | Solution Peptides since 2023 | P-21 – 12mg first-party · captured 16m ago · earns pepmg $0 · source ↗ | 12mg | $119.00 | $9.92 | · | — | buy → |
| 5 | PureHealth Peptides since Nov 2024 | P-21 (Adamantane) 10mg first-party · captured 30m ago · earns pepmg $0 · source ↗ · COAs ↗ | 10mg | $119.00 | $11.90 | · | — | buy → |
| 6 | Verified Peptides since 2019 | P21 Peptide 10MG (P021) first-party · captured 25m ago · earns pepmg $0 · source ↗ | 10mg | $119.00 | $11.90 | · | — | buy → |
| 7 | Paramount Peptides since 2023 | P21 / BDNF (Brain-derived neurotrophic factor) (10mg) first-party · captured 20m ago · earns pepmg $0 · source ↗ | 10mg | $150.00 | $15.00 | · | — | buy → |
| 8 | Nationwide Peptides since Oct 2025 · new | P21 Peptide 5mg first-party · captured 26m ago · commission · rank unaffected · source ↗ | 5mg | $97.00 | $19.40 | · | — | buy → |
| 9 | Swiss Chems since 2020 | P21 5mg first-party · captured 23m ago · earns pepmg $0 · source ↗ · COAs ↗ | 5mg | $114.95 | $22.99 | · | — | buy → |
| 10 | Core Peptides since 2019 | P21 (5mg) first-party · captured 24m ago · earns pepmg $0 · source ↗ | 5mg | $116.00 | $23.20 | · | — | buy → |
COACertificate of Analysis: a lab report stating a batch's measured identity and purity. availability: 3 of 10 vendors selling P-21 publish a COA
— 1 lab-hosted: Tydes (lab-hosted), PureHealth Peptides, Swiss Chems. What a COA proves →
| Vendor | Blend | Price | |
|---|---|---|---|
| Solution Peptides | 10 VIAL COMBO PACK: P-21 – 12mg BLEND | $1071.00 | buy → |
Multi-peptide products (e.g. BPC-157 + TB-500). We don't rank these by $/mgPrice divided by the milligrams of active compound — the like-for-like way to compare cost across different vial sizes. — a per-milligram figure across different peptides isn't comparable — so they're listed separately by total price and kept out of the headline index above.
▸ Why compare $/mg for P-21?
Prices for this compound vary widely between vendors; comparing $/mg avoids overpaying.
▸ Reading the COA
Always check each vendor's third-party Certificate of Analysis (COA) for identity and purity.
▸ Same cluster
| PT-141 | $2.10/mg | |
| Selank | $2.32/mg | |
| Semax | $1.50/mg | |
| DSIP | $3.13/mg | |
| Kisspeptin | $2.50/mg | |
| Thymosin Alpha-1 | $4.00/mg | |
| IGF-1 LR3 | $45.47/mg | |
| LL-37 | $4.60/mg | |
| VIP | $3.79/mg | |
| Thymalin | $2.00/mg | |
| Thymulin | $4.00/mg | |
| MGF | $10.00/mg | |
| Follistatin | $62.50/mg | |
| PNC-27 | $4.83/mg | |
| Gonadorelin | $6.18/mg | |
| Teriparatide | $130.00/mg | |
| HCG | —/mg | |
| Oxytocin | $3.96/mg | |
| Dihexa | $7.16/mg | |
| Adamax | $4.40/mg | |
| Cerebrolysin | $0.83/mg | |
| Methylene Blue | $1.60/mg | |
| Pinealon | $2.45/mg | |
| Cartalax | $2.40/mg | |
| Cardiogen | $2.29/mg | |
| Testagen | $1.80/mg | |
| Vilon | $2.00/mg | |
| Livagen | $2.70/mg | |
| Vesugen | $2.00/mg | |
| Prostamax | $2.00/mg | |
| Ovagen | $2.45/mg | |
| Cortagen | $2.35/mg | |
| Thymogen | $2.45/mg | |
| Chonluten | $2.00/mg | |
| Bronchogen | $2.00/mg | |
| Pancragen | $2.50/mg |
→ Reconstitution calculator for P-21 research math.
All products listed are sold by third-party vendors for laboratory and research use only (RUO). pepmg sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Listings are price-tracking data, not endorsements.