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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 · 2 graded compounds · 1 measured in people

peptides for immune system: what the research shows

2 graded compounds were studied for immune, 1 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. Few graded compounds are mapped here so far; more are added as grading continues.

body systemimmune2 compounds studied here · 1 in people
selected systemclick a lit region to explore itdrag to rotate

studied in immune

2 compounds
  1. Thymosin Alpha-1measured in people$6.00/mg
  2. LL-37animal or cell studies$16.00/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.

immune

evidence table

all 116 compounds in the database
Graded compounds studied in immune: grade, evidence ladder, US status, body systems, price per mg and research profile
compoundgradehighest rungUS statusbody systemsfrom $/mgstudies
Thymosin Alpha-1
thymic peptide
phase 3 trialcompounding restrictedimmuneliver$6.00research profile
LL-37
human cathelicidin
small human studiesrulemaking pendingimmuneskin & hair$16.00research profile

short answers

questions about peptides for immune system

Which peptides have been studied for immune system?
2 graded compounds: Thymosin Alpha-1 (B), LL-37 (D). Grades run from A (approved, strong human outcome data) to F (contradicted, unsafe, or identity problems).
Which peptides for immune system were measured in people?
1 of 2: Thymosin Alpha-1. The others have animal or cell studies only for immune.
Which peptide has the strongest evidence for immune system?
Thymosin Alpha-1: grade B, highest rung phase 3 trial. Approved in several countries for hepatitis B and as an immune adjuvant; not in the US.
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.