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live116 compounds · 15 vendors listed · 7 graded · audit of 4 Nov 2026 · prices checked 4 Nov 2026independent · grades can’t be bought

peptide database · 9 graded compounds · 7 measured in people

peptides for brain & cognitive function: what the research shows

9 graded compounds were studied for brain & mood, 7 of them in people. Each is graded A to F on published evidence; the ladder shows how far research got, from cell studies to approval.

body systembrain & mood9 compounds studied here · 7 in people
selected systemclick a lit region to explore itdrag to rotate

studied in brain & mood

9 compounds
  1. Oxytocinmeasured in people$5.00/mg
  2. PT-141measured in people$4.00/mg
  3. Cagrilintidemeasured in people$10.00/mg
  4. DSIPmeasured in people$6.00/mg
  5. Epithalonmeasured in people$1.60/mg
  6. NAD+animal or cell studies$0.06/mg
  7. Selankmeasured in people$4.00/mg
  8. Semaxmeasured in people$2.50/mg
  9. Dihexaanimal or cell studies$9.90/mg

3D anatomy: Human Reference Atlas reference organs from the NIH Visible Human Project (CC BY 4.0) and BodyParts3D, © The Database Center for Life Science (CC BY-SA 2.1 JP), fitted to each body and simplified by PeptideTech; the adapted BodyParts3D meshes are shared under the same licence. Lymph node clusters, the thyroid, joint capsules and the fat layer are drawn for orientation.

research market · not for human use

A lit region shows where studies measured an effect, not that a compound works there. Most research-market compounds are not FDA-approved.

Evidence grades come from the published literature; no vendor can pay for a grade or a ranking. Some outbound links are affiliate links; they never affect grades, scores or order.

brain & mood

evidence table

all 116 compounds in the database
Graded compounds studied in brain & mood: grade, evidence ladder, US status, body systems, price per mg and research profile
compoundgradehighest rungUS statusbody systemsfrom $/mgstudies
Oxytocin
neuropeptide hormone
approved somewhereFDA-approvedbrain & moodreproductive$5.00research profile
PT-141
bremelanotide
approved somewhereFDA-approvedbrain & moodreproductive$4.00research profile
Cagrilintide
long-acting amylin analogue
phase 3 trialinvestigationalfat & metabolismgutbrain & mood$10.00research profile
DSIP
delta sleep-inducing peptide
small human studiescompounding restrictedbrain & mood$6.00research profile
Epithalon
pineal tetrapeptide
small human studiesrulemaking pendingbrain & mood$1.60research profile
NAD+
coenzyme
small human studiesresearch onlymusclebrain & mood$0.06research profile
Selank
tuftsin analogue
small human studiesresearch onlybrain & mood$4.00research profile
Semax
ACTH 4–10 analogue
small human studiesrulemaking pendingbrain & mood$2.50research profile
Dihexa
angiotensin IV analogue
animal studiesrulemaking pendingbrain & mood$9.90research profile

short answers

questions about peptides for brain & cognitive function

Which peptides have been studied for brain & cognitive function?
9 graded compounds: Oxytocin (A), PT-141 (A), Cagrilintide (B), DSIP (C), Epithalon (C), NAD+ (C), Selank (C), Semax (C), Dihexa (D). Grades run from A (approved, strong human outcome data) to F (contradicted, unsafe, or identity problems).
Which peptides for brain & cognitive function were measured in people?
7 of 9: Oxytocin, PT-141, Cagrilintide, DSIP, Epithalon, Selank and Semax. The others have animal or cell studies only for brain & mood.
Which peptide has the strongest evidence for brain & cognitive function?
Oxytocin: grade A, highest rung approved somewhere. Approved for labour induction; research on other uses is mixed.
What does a lit region on the body map mean?
That published studies measured an effect there. Mint means it was measured in people; periwinkle means animals or cells only. A lit region is not a claim that a compound works there.
Is this medical advice?
No. PeptideTech is an independent information service. Research-market compounds are sold as research chemicals and most are not approved for use in people.