P21
A research peptide whose identity and mechanism are not well standardized in publicly available sources; it is sometimes marketed with claims of cognitive or neuroprotective effects.
- Sources carrying it
- 20
- Listings indexed
- 24
- Lowest listed
- $38.00
- Median
- $102.48
- Highest listed
- $380.00
across 5mg → 25mg
Sticker prices in US dollars, across every dosage and pack size (5mg → 25mg) — so the spread includes different quantities, not just different sellers. Prices are the sellers' own listed prices, re-checked periodically rather than tracked daily.
Who lists it & for how much
Members only
The 20 sources that list P21, and what each one charges, are behind the membership. Prices above are the range across every source that lists it — the membership is what tells you which source and for how much, with links and contacts.
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Other peptides indexed
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- HGHfrom $9.37
- Semaglutidefrom $7.31
- Melanotan IIfrom $18.10
- Tirzepatidefrom $20.00
- GHK-Cufrom $13.27
- NAD+from $15.00
- Retatrutidefrom $36.00
- Ipamorelinfrom $11.99
- IGF-1 LR3from $11.70
Sourcery is an information directory. It does not sell anything and does not handle orders — it indexes what sources publish so they can be compared in one place.