Thymic & immune-modulating peptides

Peptides associated with thymic function and immune signalling, plus antimicrobial host-defense peptides.

How this class works

These peptides are studied for effects on immune cell activity, inflammation, and host defense. Mechanisms vary across the group and are characterized to differing degrees.

Best-supported in this class

Thymosin Alpha 1 grades highest (C-tier) on current published evidence. This reflects evidence maturity — not a recommendation to use anything.

Compounds in this class

Thymosin Alpha 1C
Clinical trials
Best for: immune / inflammation research
In progress
Thymosin Beta 4D
Early human
Best for: early healing / tissue repair research
In progress
LL 37F
Animal
Best for: early immune / inflammation research
In progress
TB 500F
Animal
Best for: early healing / tissue repair research
In progress
KPVF
Animal
Best for: early immune / inflammation research
In progress

Head-to-head: Thymosin Alpha 1 vs Thymosin Beta 4

Research goals this class touches
Immune / inflammationHealing / tissue repairSports / performance (caution)

FAQ

Which thymic & immune-modulating peptides has the strongest evidence?

Thymosin Alpha 1 currently grades highest in this class (C-tier) on published evidence — which reflects evidence maturity, not a recommendation.

Are any thymic & immune-modulating peptides FDA-approved?

No members of this class are FDA-approved; they are investigational or research-only.

How do compounds in this class differ?

These peptides are studied for effects on immune cell activity, inflammation, and host defense. Mechanisms vary across the group and are characterized to differing degrees. Within the class, members differ widely in evidence maturity, approval status, and safety — the tiers and evidence stages above show how.

Keep reading
Mechanisms

The pathways these classes act through.

The peptide database

Every compound, filterable by class.

Peptides 101

Background on how peptide classes differ.

The tier board

Compare classes by published evidence.

Research reference only. Not medical advice. Compounds in a class can differ greatly in evidence, approval status, and safety.

The all-in-one peptide app

Stop reading, start tracking.

PepCue logs your doses, runs the vial math, counts your vials, and keeps the whole protocol in one place. It replaces the spreadsheet, the calculator, and the sticky notes.

  • Dose logging
  • Reconstitution math
  • Smart reminders
  • Vial & cost tracking
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