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 45 vendors.
Prices refreshed 2026-06-06
At a glance — lowest tracked $/mg
| Peptide | Vendors | Lowest $/mg |
|---|---|---|
| Dihexa | 3 | $0.20/mg |
| Cerebrolysin | 5 | $0.55/mg |
| Semax | 31 | $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 | 6 | $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).
31 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.
6 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 2026-06-06).
- How many vendors does Pep-Index track for Cognitive & Neuro peptides?
- Pep-Index tracks 45 vendors across 10 Cognitive & Neuro peptides, ranked by price per milligram. For research use only.
Other comparisons
For research use only. Pep-Index does not score or endorse vendors and makes no health, efficacy, dosing, or safety claims about any compound listed.