Peptides for immune support: what the evidence says
Thymosin alpha-1 is used as a medicine in some countries for infections and as an add-on in cancer care. KPV is promoted for inflammation.
This page has not yet been reviewed by a credentialed medical professional. It is educational and is not medical advice.
Thymosin alpha-1 has real human trials, with mixed results, and is approved in some countries but not the US. KPV evidence is limited to cells and animals.
What people use, ranked by evidence
Strongest evidence first. The numbers come live from PubMed and ClinicalTrials.gov.
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Thymosin alpha-1
Human trialsWhat people use it for: Immune support and as an add-on in infections and cancer, mainly outside the US.
What the evidence says: Human trials exist for infections and cancer, with mixed results.
39 randomized trials 65 registered trials Approved for: Authorized as a medicine in some countries; not in the US Sport: Check listThymosin alpha-1 profile → -
KPV
Animal studies onlyWhat people use it for: Gut and skin inflammation. A short fragment of the hormone alpha-MSH.
What the evidence says: Cell and animal studies of inflammation. No controlled human trials found.
0 randomized trials 0 registered trials Not approved as a medicine Sport: Check listKPV profile →
Common questions
Is thymosin alpha-1 approved?
It is authorized as a medicine (thymalfasin) in some countries, but not in the US.
Does thymosin alpha-1 boost the immune system?
Trials in infections and cancer have shown mixed results. It is not proven as a general immune booster for healthy people.
Other goals
"What people use it for" describes common claims, not recommendations. Educational only, not medical advice.