Immune and anti-inflammatory peptides

This family works on your immune system and on inflammation, either revving a sluggish response or calming an overactive one.

Thymosin alpha-1 (THY-mo-sin) is the most established. It is a natural peptide made by your thymus, a gland that trains your immune cells. It acts like a conductor that helps the immune system respond properly. It has real clinical use in some countries as immune support during infections. It is the most studied compound in this group.

KPV is a tiny three-amino-acid fragment with the opposite job, calming inflammation rather than boosting immunity. People use it for gut inflammation and skin conditions, often where the trouble is an immune system that is too active.

LL-37 is your body's own antimicrobial peptide, part of the front-line defense that punches holes in bacteria. It draws interest for stubborn infections, though it is the most finicky and least beginner-friendly of the three.

The pattern across this group is that the biology is fascinating and the human evidence is uneven. Thymosin alpha-1 has the most behind it. The others are earlier and more experimental.