Dihexa
$0.20/mg
lowest tracked
Dihexa is a synthetic oligopeptide derived from angiotensin IV that interacts with hepatocyte growth factor (HGF) signaling.
3 vendorscheapest vial $97.99 · 500mg
Vendor
Variant
$/mg
Live · Cognitive & Neuro Price Tracker · Research Use Only
Cognitive & Neuro peptide price tracker
Nootropic and neuro-research peptides — including the Semax and Selank families and other compounds studied in neuroscience research. Compare prices by $/mg. Prices normalized to dollars per milligram across 44 vendors.
Prices refreshed 2026-06-03
At a glance — lowest tracked $/mg
| Peptide | Vendors | Lowest $/mg |
|---|---|---|
| Dihexa | 3 | $0.20/mg |
| Cerebrolysin | 5 | $0.55/mg |
| Semax | 30 | $1.94/mg |
| N-Acetyl Semax Amidate | 5 | $2.17/mg |
| Selank | 31 | $2.50/mg |
| N-Acetyl Selank Amidate | 4 | $2.65/mg |
| DSIP | 32 | $3.30/mg |
| PE-22-28 | 9 | $3.46/mg |
| Adamax | 3 | $6.78/mg |
| P21 | 5 | $9.80/mg |
Cerebrolysin
$0.55/mg
lowest tracked
Cerebrolysin is a mixture of enzymatically processed peptides derived from porcine brain tissue, containing low-molecular-weight neuropeptides.
5 vendorscheapest vial $32.95 · 60mg
Vendor
Variant
$/mg
Semax
$1.94/mg
lowest tracked
Semax is a synthetic peptide described in the Russian research literature, related to a fragment of adrenocorticotropic hormone (ACTH).
30 vendorscheapest vial $58.25 · 30mg
Vendor
Variant
$/mg
N-Acetyl Semax Amidate
$2.17/mg
lowest tracked
N-Acetyl Semax Amidate is a chemically modified (acetylated and amidated) form of the synthetic peptide Semax.
5 vendorscheapest vial $65.00 · 30mg
Vendor
Variant
$/mg
Selank
$2.50/mg
lowest tracked
Selank is a synthetic heptapeptide analogue of the human peptide tuftsin, described in the Russian research literature.
31 vendorscheapest vial $24.99 · 10mg
Vendor
Variant
$/mg
N-Acetyl Selank Amidate
$2.65/mg
lowest tracked
N-Acetyl Selank Amidate is a chemically modified (acetylated and amidated) form of the synthetic peptide Selank.
4 vendorscheapest vial $53.09 · 20mg
Vendor
Variant
$/mg
DSIP
$3.30/mg
lowest tracked
DSIP (delta-sleep-inducing peptide) is a naturally occurring neuropeptide first characterized through its effects on EEG activity in animal studies.
32 vendorscheapest vial $33.00 · 10mg
Vendor
Variant
$/mg
PE-22-28
$3.46/mg
lowest tracked
PE-22-28 is a synthetic peptide derived from spadin, studied as a research compound related to TREK-1 potassium-channel signaling.
9 vendorscheapest vial $45.00 · 13mg
Vendor
Variant
$/mg
Adamax
$6.78/mg
lowest tracked
Adamax is a synthetic peptide compound related to the Semax family, offered as a research chemical.
3 vendorscheapest vial $67.77 · 10mg
Vendor
Variant
$/mg
P21
$9.80/mg
lowest tracked
P21 is a synthetic peptide studied as a small fragment related to ciliary neurotrophic factor (CNTF) signaling.
5 vendorscheapest vial $98.00 · 10mg
Vendor
Variant
$/mg
Frequently asked
- What is the cheapest Cognitive & Neuro peptide by price per mg?
- Dihexa is the lowest-priced Cognitive & Neuro peptide tracked, at $0.20/mg from SwissChems (as of 2026-06-03).
- How many vendors does Caliber track for Cognitive & Neuro peptides?
- Caliber tracks 44 vendors across 10 Cognitive & Neuro peptides, ranked by price per milligram. For research use only.
Other comparisons
For research use only. Caliber Peptide Index does not score or endorse vendors and makes no health, efficacy, dosing, or safety claims about any compound listed.