Your goal
Supporting your immune system
Here's the honest truth: there's no peptide that reliably makes a healthy person's immune system stronger. The real science lives in sick people - fighting off chronic infections, responding to vaccines, recovering from serious illness. A few compounds have genuine human data there. Most of the rest are anti-inflammatory ideas that only work in animals, plus a couple of famous drugs that got tagged here for the wrong reasons.
What actually works
1The strongest real evidence for this goal.
Promising, still unproven
2Interesting early signals — not proven yet.
ARA-290
EmergingA tweaked piece of the EPO hormone that calms inflammation, with real human data in nerve pain and diabetes - but nothing yet testing it as a general immune booster.
Selank
EmergingBuilt from a natural immune peptide and proven in people to ease anxiety, but its immune-balancing effects have only shown up in animals so far.
Mostly hype - be skeptical
7Lots of buzz, little human proof. Tread carefully.
Tirzepatide
EarlyFamous and proven - but for weight loss and diabetes, not immunity; it only nudges inflammation markers as a side effect of losing weight.
Thymulin
EarlyA genuine immune-training hormone, but it's only ever been injected into animals, never given to people as a treatment.
LL-37
EarlyA germ-killing peptide your own body makes - exciting in the lab, but with no safe human dose or usable supplement form.
KPV
EarlyA tiny anti-inflammatory peptide that calms gut and skin inflammation in animals, and hasn't been tested in people.
VIP
EarlyA natural anti-inflammatory hormone that's a major research topic, not a proven self-use peptide.
Melatonin
EarlyA solid sleep aid whose immune-boosting reputation is still just a lab-and-theory story.
Epithalon
EarlyAn anti-aging peptide with almost no human evidence for anything, and none for immunity - the same goes for its cousins like N-Acetyl Epitalon Amidate and Vilon.
The honest bottom line
If you remember one thing: no peptide is proven to boost a healthy immune system. Thymosin Alpha-1 is the only one with real human immune data, and even that's for people who are already sick.
How to read the strength meter