Nonapeptide-1 vs Larazotide Acetate
Side-by-side comparison of key properties, dosing, and research.
Skin & Cosmetic
Nonapeptide-1Recovery & Repair
Larazotide Acetate- Summary
- Nonapeptide-1 is a synthetic 9-amino acid peptide that inhibits melanin production by blocking α-MSH (alpha-melanocyte stimulating hormone) receptor binding. Used in cosmetic formulations for skin lightening and evening skin tone, it is particularly effective for UV-induced and hormonal hyperpigmentation.
- Larazotide acetate is an 8-amino acid peptide (Gly-Gly-Val-Leu-Val-Gln-Pro-Gly) derived from Zonula Occludens Toxin (ZOT) of Vibrio cholerae. It paradoxically acts as a ZOT antagonist to close tight junctions and reduce intestinal permeability ('leaky gut'). It is the most advanced clinical compound targeting gut permeability directly.
- Half-Life
- Not applicable (topical)
- Local gut action; minimal systemic exposure
- Admin Route
- Topical
- Oral
- Research
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- Typical Dose
- 0.05–0.5% concentration in formulation
- 0.5-2 mg
- Frequency
- Twice daily
- 3x daily
- Key Benefits
- Inhibits UV-induced tanning and hyperpigmentation
- Reduces hormonal melasma
- Evens skin tone at receptor level
- Well-tolerated with minimal irritation
- Complementary to tyrosinase inhibitors for enhanced brightening
- Reduces post-inflammatory hyperpigmentation
- Directly reduces intestinal tight junction permeability
- Clinical efficacy in celiac disease (Phase 3 trials)
- Reduces systemic inflammation from gut permeability
- Targets root cause of leaky gut (Zonulin pathway)
- Local gut action without systemic absorption
- Potential application in IBS, IBD, autoimmune conditions
- Side Effects
- Generally very well-tolerated
- Rare contact sensitivity in susceptible individuals
- Theoretical risk of excessive depigmentation with prolonged high-concentration use
- Headache (mild, dose-dependent)
- Nausea (rare)
- Well-tolerated overall in clinical trials
- Stacks With
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