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● P-21Nootropic peptide

Compound dossier · evidence, sources, and live market

P-21

Nootropic peptide not yet reviewed 0 cited studies 11 live vendors

A neurotrophic peptide (P021) studied in preclinical research on cognition and BDNF-pathway models.

cheapest (first-party)
$7.50/mg
highest
$23.20/mg
first-party vendors
11
Fair-price band · 11 first-party vendors · $/mg
median $12.75
$7.50cheapest $23.20highest
Comparing vendors on P-21 can save up to $15.70/mg — the cheapest tracked is $7.50/mg, the priciest $23.20/mg.

first-party prices captured 40m ago

Compare by exact vialThe small sealed glass container a compound ships in. size: 5mg (3 vendors)10mg (6 vendors)

email only when a vendor actually lowers a P-21 price — set a $/mg to only hear when it crosses your number · one-click stop
● P-21 · market statistics 11 sources tracked

These figures are what pepmg still publishes about price: the floor, the middle, the spread and how many sources we track, computed from listings we captured first-party and refreshed on the same schedule as always. We no longer publish the individual listings or the sellers behind them.

lowest tracked $7.50/mg
median $12.75/mg
highest tracked $23.20/mg
spread 3.1×
Lowest tracked $/mg, 27 days flat over the period
07/12 · $7.50 low $7.50 · high $7.50 08/26 · $7.50

Computed from 11 in-stock listings across 11 sources we captured first-party, with bulk vials, blends and statistical outliers excluded so the figures compare like with like. The spread is the highest tracked price divided by the lowest — how much the same milligram varies depending on where you look. The chart is the daily minimum; days we did not capture are left out rather than filled in.

COACertificate of Analysis: a lab report stating a batch's measured identity and purity. availability: 10 of 11 sources selling P-21 publish a COA — 3 with at least one certificate you can open at the testing lab. What a COA proves →
Blends & stacks: 1 first-party multi-peptide product contains P-21 , priced $1071.00–$1071.00 per unit. 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 stay out of the figures 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 $2.00/mg
Selank $2.32/mg
Semax $0.84/mg
DSIP $3.00/mg
Kisspeptin $2.50/mg
Thymosin Alpha-1 $3.85/mg
IGF-1 LR3 $29.99/mg
LL-37 $4.60/mg
VIP $3.79/mg
Thymalin $3.45/mg
Thymulin $4.00/mg
MGF $10.00/mg
Follistatin $44.91/mg
PNC-27 $4.83/mg
Gonadorelin $6.18/mg
Teriparatide —
HCG —/mg
Oxytocin $3.96/mg
Dihexa $7.16/mg
Adamax $4.29/mg
Cerebrolysin $0.69/mg
Methylene Blue $1.60/mg
Pinealon $2.14/mg
Cartalax $1.89/mg
Cardiogen $1.89/mg
Testagen $1.80/mg
Vilon $1.89/mg
Livagen $1.89/mg
Vesugen $1.89/mg
Prostamax $1.89/mg
Ovagen $1.89/mg
Cortagen $2.35/mg
Thymogen $2.42/mg
Chonluten $1.89/mg
Bronchogen $1.89/mg
Pancragen $2.56/mg
→ Reconstitution calculator for P-21 research math.
All products listed are sold by third-party vendors for laboratory and research use only (RUO). Where an FDA label or a peer-reviewed study has published a dose, pepmg reports it with the source named, because that is safer than guessing. It is a report, not medical advice and not a recommendation to use anything. pepmg sells nothing and ships nothing. Listings are price-tracking data, not endorsements.