Compare Peptides
Select any two compounds for a side-by-side comparison of mechanism, uses, risks, and FDA regulatory status.
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A naturally occurring iron-binding glycoprotein found in milk, saliva, tears, and mucosal secretions. One of the body's first-line innate immune defenses. Available as an oral supplement and in research-grade injectable form.
A thymic peptide that plays a central role in immune system regulation. Approved as a drug in over 35 countries (though not in the US) for hepatitis B and C treatment and as an immune booster.
Binds free iron, depriving bacteria of a nutrient essential for growth (bacteriostatic effect). Also directly disrupts bacterial cell membranes (bactericidal). Modulates immune response by promoting T-cell and NK cell activity while reducing inflammatory cytokines. Enhances iron absorption in the gut.
Enhances T-cell function, promotes dendritic cell maturation, and modulates cytokine production. Acts as an immune system regulator rather than a simple stimulant, helping to balance immune responses.
- Immune support
- Iron deficiency (improves absorption)
- Gut health
- Antimicrobial defense
- Anti-inflammatory support
- Immune system support
- Chronic infection management
- Cancer adjunct therapy (in some countries)
- Post-illness recovery
- Autoimmune condition management
- Generally well-tolerated orally
- GI discomfort at high doses
- Allergic reactions in dairy-sensitive individuals
- Injectable form has limited safety data
- Generally well-tolerated in clinical use
- Injection site reactions
- Rare allergic reactions
- May interact with immunosuppressive drugs
Available as a dietary supplement (GRAS status). Not FDA-approved for any medical indication. Widely available OTC. Injectable form is research-only.
Reclassified to Category 1 in February 2026 as part of the HHS announcement restoring compounding access. Not affected by the April 15, 2026 Category 2 removal action. Approved as Zadaxin in 35+ countries but not FDA-approved in the US. Available through licensed 503A compounding pharmacies with a physician prescription.
- Lactoferrin: a multifunctional glycoprotein
2012 · PubMed
This comparison is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any peptide therapy.