Best Immune Peptides: Vendors Ranked (2026)

Disclosure: We earn a commission from vendors on this page. Rankings are based on price, COA availability, and reputation.

Best Immune Peptides (2026)

Immune peptides strengthen your body's defense systems — from T-cell activation to antimicrobial action. Here are the best vendors for each.

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At a Glance

Gold standard immune peptide. FDA orphan drug for hepatitis B. Activates T-cells and dendritic cells. Well-tolerated even long-term.

Ascension Peptides

$71.00

10mg

$7.10/mg

Yes

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Ion Peptide

$65.00

$6.50/mg

EZ Peptides

$58.00

$5.80/mg

Potent anti-inflammatory tripeptide derived from alpha-MSH. Strong gut and skin inflammation data. Very few side effects.

$50.00

$5.00/mg

$49.00

$4.90/mg

$44.00

$4.40/mg

Natural antimicrobial peptide — kills bacteria, viruses, and fungi directly. Also modulates immune response.

$89.00

$8.90/mg

$45.00

5mg

$9.00/mg

$78.00

$7.80/mg

Thymus hormone that matures T-cells. Age-related decline makes supplementation logical but limited modern research.

Limitless Biotech

$19.99

$2.00/mg

Vasoactive intestinal peptide — broad anti-inflammatory. Used in CIRS/mold illness protocols. Complex dosing.

$80.00

$8.00/mg

$79.00

$7.90/mg

How We Rank Vendors

Every vendor is scored on three factors: price per mg (40%), third-party COA testing (30%), and community reputation (30%). Scores floor at 8.0 — if a vendor is on our site, they are worth buying from.

Normalized to $/mg for fair comparison across vial sizes.

Third-party lab results confirming purity and identity.

Community feedback, shipping reliability, and track record.