Disclosure: We earn a commission from vendors on this page. Rankings are based on price, COA availability, and reputation.
Best Nootropic Peptides (2026)
Nootropic peptides enhance focus, memory, and neuroprotection without the side effects of traditional stimulants. Here are the top vendors.
At a Glance
1Semax3 vendorsStrongest nootropic peptide — boosts BDNF, focus, and memory. Nasal spray. Virtually no side effects. Prescribed in Russia for decades.
Strongest nootropic peptide — boosts BDNF, focus, and memory. Nasal spray. Virtually no side effects. Prescribed in Russia for decades.
Strongest nootropic peptide — boosts BDNF, focus, and memory. Nasal spray. Virtually no side effects. Prescribed in Russia for decades.
| Vendor | Price | Amount | $/mg | COA | |
|---|---|---|---|---|---|
| Limitless Biotech | $36.59 | 20mg | $1.83/mg | Yes | Buy → |
| Penguin Peptides | $55.00 | 5mg | $11.00/mg | Yes | Buy → |
| Limitless Biotech | $36.59 | 10mg | $3.66/mg | Yes | Buy → |
2Selank3 vendorsAnti-anxiety + cognitive enhancement. Calmer focus than semax. Also nasal. Excellent safety profile.
Anti-anxiety + cognitive enhancement. Calmer focus than semax. Also nasal. Excellent safety profile.
Anti-anxiety + cognitive enhancement. Calmer focus than semax. Also nasal. Excellent safety profile.
| Vendor | Price | Amount | $/mg | COA | |
|---|---|---|---|---|---|
| EZ Peptides | $40.00 | 10mg | $4.00/mg | Yes | Buy → |
| Limitless Biotech | $40.99 | 20mg | $2.05/mg | Yes | Buy → |
| Limitless Biotech | $109.99 | 30mg | $3.67/mg | Yes | Buy → |
3DSIP3 vendorsSleep peptide that normalizes sleep architecture. Helps with deep sleep but effects are subtler than the cognitive peptides.
Sleep peptide that normalizes sleep architecture. Helps with deep sleep but effects are subtler than the cognitive peptides.
Sleep peptide that normalizes sleep architecture. Helps with deep sleep but effects are subtler than the cognitive peptides.
| Vendor | Price | Amount | $/mg | COA | |
|---|---|---|---|---|---|
| EZ Peptides | $58.00 | 10mg | $5.80/mg | Yes | Buy → |
| Penguin Peptides | $40.00 | 5mg | $8.00/mg | Yes | Buy → |
| Certified Pep | $40.00 | 5mg | $8.00/mg | Yes | Buy → |
How We Rank Vendors
Every vendor is scored on three factors: price per mg (40%), third-party COA testing (30%), and community reputation (30%). Scores floor at 8.0 — if a vendor is on our site, they are worth buying from.
Normalized to $/mg for fair comparison across vial sizes.
Third-party lab results confirming purity and identity.
Community feedback, shipping reliability, and track record.