§ COMPOUND PROFILE · INDEPENDENT RESEARCH● 3 TESTS · AVG 99.27% · 219 SHOPS
◆ COMPOUND · COGNITIVE ENHANCEMENT & NEUROPROTECTION
◆ Cognitive Enhancement & Neuroprotection

P21 (P021)

Peptigrity tracks P21 (P021) across 219 shops with 3 independent lab tests and an average HPLC purity of 99.27%.

Avg. HPLC purity99.27%
Lab tests on file3
Shops selling219
See shops →+ Submit test

Lab test results

3 tests · AVG 99.27%
◆ CROSS-SHOP COMPARISON · SORTED BY DATE3 of 3 SHOWN
Date
Shop
Purity
Qty (labeled → tested)
Endotoxins
Lab
Apr 26, 2026
purehealthpeptides.com
99.00%
10mg→10.03mg+0.3%
-
Ethos AnalyticsView →
Apr 1, 2026
libertypeptides.com
99.80%
5mg→6.32mg+26.4%
≤0.05 EU/mL
BioviridianView →
Jan 22, 2026
purehealthpeptides.com
99.00%
10mg→10.37mg+3.7%
-
Ethos AnalyticsView →

Shops selling P21 (P021)

219 verified · top 6 shown
L
licensedpeptides.com
◆ Trust 99/100 · 99.6% pure · 51 tests
P
primepeptides.co
◆ Trust 97/100 · 99.6% pure · 22 tests
R
regenerativeresearch.co
◆ Trust 97/100 · 99.7% pure · 37 tests
P
peptidecrafters.com
◆ Trust 97/100 · 99.6% pure · 210 tests
P
primelab-peptides.com
◆ Trust 99/100 · 99.7% pure · 9 tests
N
ngpeptide.com
◆ Trust 97/100 · 96.7% pure · 65 tests
Browse all 219 shops selling P21 (P021) →

What Is P21 (P021)

Mechanism & research

P21 (P021) vs other peptides

Same category · Lab-verified
Compound
Mechanism
Avg purity
Tests
Compare
P21 (P021)→ This page
CNTF-derived neurogenic peptide mimetic
99.27%
3
SEMAX
Synthetic ACTH(4-10) heptapeptide analog
99.41%
138
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SELANK
Tuftsin-derived anxiolytic heptapeptide
99.59%
129
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DSIP (Delta Sleep-inducing Peptide)
Nine-amino-acid sleep-regulating neuropeptide
99.31%
107
Compare →
Oxytocin
Nonapeptide neurohypophyseal hormone
99.33%
24
Compare →
N-Acetyl Semax Amidate
Acetylated/amidated SEMAX analog
99.82%
8
Compare →
Compared on independent lab purityBrowse all Cognitive Enhancement & Neuroprotection →

Related peptides

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◆ Cognitive Enhancement & Neuroprotection
Adamax (Davunetide/NAP)
99.7% · 4 tests · 219 shops
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DSIP (Delta Sleep-inducing Peptide)
99.3% · 107 tests · 219 shops
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◆ Cognitive Enhancement & Neuroprotection
N-Acetyl Semax Amidate
99.8% · 8 tests · 219 shops
→ Full profile
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Oxytocin
99.3% · 24 tests · 219 shops
→ Full profile
● COMMUNITY VERIFICATION

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