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Peptides for Immune system

The peptides people most often research for immune system, with how much evidence exists for each. A long list does not mean any of them is proven to work in people.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureUpdated
Peptides listed
4
With human trials
1
FDA approved (any use)
1
Searches per month
1,330
Showing 4 peptides · ordered by search interest for this goal
  1. Thymosin Alpha-1Immune modulatorHuman RCT evidence, 4 of 4BMJ 2025, PMID 39814420Human222Animal101Summarised10Not FDA approved · approved abroadFor immune systemOverview
  2. BPC-157Gastric pentadecapeptideNo study with an outcome for immune systemPubMed search, 2 Oct 2026Human0Animal1Summarised0PCAC voted 8–6 for 503A (Jul 2026)Overview
  3. TB-500Synthetic fragment of thymosin beta-4No study with an outcome for immune systemPubMed search, 2 Oct 2026Human27Animal37Summarised0PCAC voted 8–6 for 503A (Jul 2026)Overview
  4. KPVAnti-inflammatory tripeptideNo study with an outcome for immune systemPubMed search, 2 Oct 2026Human2Animal3Summarised0PCAC voted 8–6 for 503A (Jul 2026)Overview
Read this first

What this list does not show

Search demand tells you what people are curious about, not what works. Read each peptide's evidence before anything else.

Search interest is not evidence

This list follows what people search for and discuss. It says nothing about how well any peptide works.

Animal results may not carry over

Doses, routes and effects seen in rodents or cell dishes often have no tested human equivalent.

Approval covers specific uses

An FDA approval applies to the conditions and doses on the label, not to every goal a drug is searched with.

Combinations are a separate question

Blends and stacks put several peptides together. Evidence for one peptide is not evidence for the mix.
Related goals

Explore nearby goals

What people search

  • peptides for immune system590/mo
  • immunity peptides210/mo
  • best peptides for immune system210/mo
  • peptides for immunity110/mo
  • immune system peptides110/mo
  • peptide therapy for immune system70/mo

US monthly searches, Google Keyword Planner, Oct 2026. Shown so you can see which questions this page answers.

Sources

  1. 1The efficacy and safety of thymosin α1 for sepsis (TESTS): multicentre, double blinded, randomised, placebo controlled, phase 3 trial.BMJ (Clinical research ed.) · 2025PMID 39814420Accessed 2 Oct 2026
  2. 2PubMed search: "BPC-157"[tiab] OR BPC157[tiab] OR "body protection compound"[tiab] OR "pentadecapeptide BPC"[tiab] (230 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  3. 3PubMed search: ("BPC-157"[tiab] OR BPC157[tiab] OR "body protection compound"[tiab]) AND (half-life[tiab] OR pharmacokinetic*[tiab]) (7 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  4. 4PubMed search: "BPC-157"[tiab] AND humans[mh] (52 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  5. 5PubMed search: ("BPC-157"[tiab] OR BPC157[tiab] OR "body protection compound"[tiab] OR "pentadecapeptide BPC"[tiab]) AND (patients[tiab] OR clinical trial[pt] OR randomized[tiab]) (25 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  6. 6PubMed search: ("BPC-157"[tiab] OR BPC157[tiab] OR "body protection compound"[tiab] OR "pentadecapeptide BPC"[tiab]) AND (colitis[tiab] OR inflammatory bowel[tiab]) (48 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  7. 7PubMed search: ("BPC-157"[tiab] OR BPC157[tiab] OR "body protection compound"[tiab] OR "pentadecapeptide BPC"[tiab]) AND (tendon[tiab] OR ligament[tiab] OR muscle[tiab] OR bone[tiab] OR arthritis[tiab]) (58 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  8. 8PubMed search: ("BPC-157"[tiab] OR BPC157[tiab] OR "body protection compound"[tiab] OR "pentadecapeptide BPC"[tiab]) AND (nerve[tiab] OR neuropath*[tiab] OR spinal[tiab] OR liver[tiab] OR wound[tiab] OR burn[tiab]) (90 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  9. 9PubMed search: ("TB-500"[tiab] OR TB500[tiab] OR "thymosin beta-4"[tiab] OR "thymosin beta4"[tiab] OR Tbeta4[tiab]) (1199 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  10. 10PubMed search: ("TB-500"[tiab] OR TB500[tiab] OR "thymosin beta-4"[tiab] OR "thymosin beta4"[tiab] OR Tbeta4[tiab]) AND (humans[mh] OR patients[tiab]) (678 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  11. 11PubMed search: ("TB-500"[tiab] OR TB500[tiab] OR "thymosin beta-4"[tiab] OR "thymosin beta4"[tiab] OR Tbeta4[tiab]) AND (randomized[tiab] OR clinical trial[pt]) (18 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  12. 12PubMed search: ("TB-500"[tiab] OR TB500[tiab] OR "thymosin beta-4"[tiab] OR "thymosin beta4"[tiab] OR Tbeta4[tiab]) AND (half-life[tiab] OR pharmacokinetic*[tiab]) (16 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  13. 13PubMed search: ("TB-500"[tiab] OR TB500[tiab] OR "thymosin beta-4"[tiab] OR "thymosin beta4"[tiab] OR Tbeta4[tiab]) AND (wound[tiab] OR dermal[tiab] OR skin[tiab] OR hair[tiab]) (212 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  14. 14PubMed search: ("TB-500"[tiab] OR TB500[tiab] OR "thymosin beta-4"[tiab] OR "thymosin beta4"[tiab] OR Tbeta4[tiab]) AND (tendon[tiab] OR muscle[tiab] OR cardiac[tiab] OR myocardial[tiab] OR heart[tiab]) (246 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  15. 15PubMed search: "TB-500"[tiab] OR TB500[tiab] OR "Ac-LKKTETQ"[tiab] (33 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  16. 16PubMed search: (KPV[tiab] OR "Lys-Pro-Val"[tiab] OR "lysine-proline-valine"[tiab]) (132 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  17. 17PubMed search: (KPV[tiab] OR "Lys-Pro-Val"[tiab] OR "lysine-proline-valine"[tiab]) AND (alpha-MSH[tiab] OR melanocortin[tiab] OR colitis[tiab] OR inflammat*[tiab]) (95 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  18. 18PubMed search: (KPV[tiab] OR "Lys-Pro-Val"[tiab] OR "lysine-proline-valine"[tiab]) AND (half-life[tiab] OR pharmacokinetic*[tiab]) (2 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  19. 19PubMed search: (KPV[tiab] OR "Lys-Pro-Val"[tiab] OR "lysine-proline-valine"[tiab]) AND (clinical trial[pt] OR randomized[tiab] OR patients[tiab]) (9 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026

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