P21 price per mg, by vendor

13 listings from 11 vendors, refreshed Oct 15, 2026.

$5.00/mg

Lowest, in a multi-vial pack

$7.75/mg

Median

$24.00/mg

Highest

$5.83/mg

Lowest from a vendor with public batch COAs

How much does P21 cost?

Prices run from $5.00/mg to $24.00/mg across 11 vendors, a 4.8× spread. The median listing is $7.75/mg.
The most common size is 10 mg (6 listings): $75 to $128 per vial, median $95.
The cheapest in-stock listing from a vendor we rank is $5.00/mg from Bulk Peptide Wholesale (transparency 45/100), as a pack: 10 mg × 10 for $500. The cheapest single vial is $5.83/mg: 12 mg for $70 from Evolve BioPep.
3 of 11 vendors publish batch-specific COAs for their products. Vendors that publish batch COAs charge a median $11.00/mg (3 vendors), 29% more than those that don't ($8.49/mg, 8 vendors).

Where to buy P21: lowest prices from the most transparent vendors

The cheapest in-stock P21 from vendors scoring 60 or more on our transparency checks, by price per mg, leaving out vendors with red flags or a warning letter, lawsuit or seizure in the past three years (why).

#	Vendor	Transparency	COAs	Best listing	$/mg	Vendor's page
1	Evolve BioPep	83/100	Batch COAs public (Vanguard Laboratory, Chromate, ILS Laboratories)	12 mg for $70	$5.83/mg	View
2	Peptides World	80/100	Generic COAs only (Janoshik Analytical, MZ Biolabs)	10 mg for $80	$7.99/mg	View
3	Protide Health	75/100	Batch COAs public (Freedom Diagnostics)	10 mg for $110	$11.00/mg	View
4	Paramount Peptides	65/100	Generic COAs only	10 mg for $128	$12.75/mg	View

P21 price by vial size

Vial size	Listings	Lowest	Median	Highest	Median $/mg
5 mg	3	$89	$115	$120	$22.99/mg
10 mg	6	$75	$95	$128	$8.49/mg

Single vials only; multi-vial packs are in the full table below. Sizes with at least two listings.

All P21 listings

Vendor	Transparency	Product	Size	Price	$/mg	vs median	Stock	Vendor's page
Bulk Peptide Wholesale	45/100*	P21 (P021) 10 mg (10 vials)	10 mg × 10	$500	$5.00/mg	−35%	In stock	View
Evolve BioPep	83/100	P21 12mg	12 mg	$70	$5.83/mg	−25%	In stock	View
PurePeps	35/100*	P21 (P021) 10MG	10 mg	A$100	$7.01/mg*	−9%	In stock	View
Bulk Peptide Supply	57/100*	P21 (P021) 10 mg	10 mg	$75	$7.50/mg	−3%	In stock	View
Bulk Peptide Supply	57/100*	P21 (P021) 10 mg (10 vials)	10 mg × 10	$750	$7.50/mg	−3%	In stock	View
Peptides World	80/100	P-21-10Mg	10 mg	$80	$7.99/mg	+3%	In stock	View
PS Peptides	22/100*	P21 (1 Vial)	10 mg	$90	$9.00/mg	+16%	Out of stock	View
Protide Health	75/100	P21 10mg	10 mg	$110	$11.00/mg	+42%	In stock	View
Paramount Peptides	65/100	P21 / BDNF (Brain-derived neurotrophic factor) (10mg)	10 mg	$128	$12.75/mg	+65%	In stock	View
Volta Peptides	70/100	P21 (P021) 5mg	5 mg	$89	$17.80/mg	+130%	Out of stock	View
Swiss Chems FDA warning letter, Dec 2024	72/100	P21 5mg	5 mg × 10	$1,150	$22.99/mg	+197%	Out of stock	View
Swiss Chems FDA warning letter, Dec 2024	72/100	P21 5mg	5 mg	$115	$22.99/mg	+197%	In stock	View
American Peptides	47/100*	P-21	5 mg	$120	$24.00/mg	+210%	In stock	View

Transparency is our score out of 100 for how much a vendor makes public about itself. It isn't a purity test.

Prices come from each vendor's public product feed and were last fetched Oct 15, 2026. They exclude shipping and discounts. $/mg uses the labeled amount, not measured content. $/mg marked * was converted to US dollars from the listed currency at the European Central Bank reference rate. A transparency score marked * is based on fewer than six checks; checks we couldn't complete score 0. How we compare prices.

Before you compare on price alone

A low price is only a bargain if the vial holds what the label says, and a high one doesn't prove quality: only an independent lab test shows what's in a vial. Check the vendor's latest batch certificate of analysis (how to read one).

Is P21 legal? Status by market

A summary of official sources, checked Oct 15, 2026. Not legal advice.

United States: No FDA-approved drug contains P21 (P021) [1].
United Kingdom: No UK-licensed medicine containing P21 (P021) appears in the MHRA products database [2].
European Union: No medicine containing P21 (P021) is authorized in the EU, according to EMA's central and Article 57 product data [3][4].
Canada: No product containing P21 (P021) appears in Health Canada's Drug Product Database [5].
Australia: P21 (P021) is not named in Australia's Poisons Standard (October 2026) [6].
Sport (WADA): Not named on the 2026 Prohibited List; its section S0 bans any pharmacological substance with no current approval for human therapeutic use [7].

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