Cheapest Semax prices: best $/mg after codes
Cognitive / NootropicNootropic peptide studied in cognition research.
📖 New to Semax? Read the full guide →Cheapest Semax right now
$20.57 at Flawless Compounds
Best value is $2.06/mg at Flawless Compounds. Prices updated October 19, 2026.
Cheapest by size
after code peptidepub
| Vendor | Testing How grades work | Size | Price | $/unit | Deal |
|---|---|---|---|---|---|
Flawless CompoundsBest valueBest tested USA | 7/7 tested | 10 mg | $20.57$24.20 after code peptidepub | $2.06/mg | |
Iron Protocol USA | 7/7 tested | 10 mg | $20.57$24.20 after code peptidepub | $2.06/mg | |
Glow Aminos | 0/7 tested | 10 mg | $22.44$26.40 after code peptidepub | $2.24/mg | |
RetaOne Labs USA | 6/7 tested | 10 mg | $24.70$26 after code peptidepub | $2.47/mg | |
Ascension Peptides USA | 6/7 tested | 10 mg | $25$50 after code PEPTIDEPUB | $2.50/mg | |
NextGen Peptides USA | 7/7 tested | 30 mg | $81$90 after code peptidepub | $2.70/mg | |
Purus Peptides USA | 4/7 tested | 10 mg | $28$35 after code peptidepub | $2.80/mg | |
NextGen Peptides USA | 7/7 tested | 10 mg | $31.50$35 after code peptidepub | $3.15/mg | |
Puratek Peptides USA | 7/7 tested | 10 mg | $32.95 | $3.30/mg | |
Glacier Aminos | 7/7 tested | 10 mg | $33.20$36.89 after code PEPTIDEPUB | $3.32/mg | |
LabFirst Peptides sold as Semax | 0/7 tested | 10 mg | $35.10$39 after code peptidepub | $3.51/mg | |
Soraci Labs USAsold as Semax – 10mg | 3/7 tested | 10 mg | $35.99 | $3.60/mg | |
Reserve Research sold as Semax | 0/7 tested | 10 mg | $36$40 after code peptidepub | $3.60/mg | |
Aero Peptides | Unrated | 10 mg | $38.24$44.99 after code PEPTIDEPUB | $3.82/mg | |
AMP (Ameano Peptides) | 3/7 tested | 10 mg | $39.60$44 after code PEPTIDEPUB | $3.96/mg | |
EZ Peptides | 2/7 tested | 10 mg | $39.60$44 after code PEPTIDEPUB | $3.96/mg | |
LabSourced Peptides USA | 7/7 tested | 10 mg | $41.65$49 after code peptidepub | $4.17/mg | |
Certified-Pep sold as SEMAX 10MG | 0/7 tested | 10 mg | $43.20$54 after code peptidepub | $4.32/mg | |
American Peptides sold as SEMAX | 0/7 tested | 10 mg | $58.50$65 after code peptidepub | $5.85/mg | |
Valor Peptides | 6/7 tested | 5 mg | $33.29$36.99 after code PEPTIDEPUB | $6.66/mg | |
Valkyrie Peptides | 4/7 tested | 10 mg | $67.50$75 after code PEPTIDEPUB | $6.75/mg | |
Vyal Labs sold as Semax | 0/7 tested | 10 mg | $80.10$89 after code peptidepub | $8.01/mg | |
World Wide Peptides | 6/7 tested | 10 mg | $144$160 after code PEPTIDEPUB | $14.40/mg | |
World Wide Peptides | 6/7 tested | 5 mg | $79.20$88 after code PEPTIDEPUB | $15.84/mg |
Prices are for research materials sold for laboratory use only. PeptidePub may earn a commission from vendor links or codes at no cost to you. This does not affect testing grades or rankings. See our methodology. Best value is the lowest $/mg among vendors with verifiable published testing; Best tested is the vendor passing the most of our 7 testing checks.
Which size should I buy?
Bigger vials cost less per mg. Right now the cheapest 30 mg option is $2.70/mg, about 59% less per mg than the cheapest 5 mg option at $6.66/mg.
The saving only counts if you can use the vial within its storage window. This peptide's guide lists a reconstituted use-within window of 2-4 weeks. See handling and storage.
Smaller vials cost more per mg but waste less if a vial sits open past its window. Filter to 5 mg and Filter to 30 mg.
Watch Semax prices
Today's best is $2.06/mg. We'll email you when a tested vendor beats it, a discount code changes, or new lab results come in. No spam — only real changes.
Cheapest Semax price FAQ
What's the cheapest Semax?
The cheapest Semax right now is $2.06/mg at Flawless Compounds for the 10 mg option, after code peptidepub.
How is Semax price per mg calculated?
PeptidePub normalizes each vial by dividing the effective checkout price by the listed size in mg. That lets different vial sizes sit in one cheapest-first comparison.
Are discount codes included in these prices?
Yes. When a vendor has a confirmed code percent in the catalog, PeptidePub applies that discount before calculating effective price and effective price per unit. Codes without a confirmed percent are shown, but they are not used to lower the calculated price.
How often are prices updated?
The catalog is refreshed daily from vendor data sweeps, and the page reflects the current catalog values at build time. When vendor pricing or codes change, the comparison and cheapest-offer answer update from the same source data.
Which size should I buy?
Bigger vials cost less per mg. Right now the cheapest 30 mg option is $2.70/mg, about 59% less per mg than the cheapest 5 mg option at $6.66/mg. The saving only counts if you can use the vial within its storage window.
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