Nonapeptide-1 vs PGPIPN
Side-by-side comparison of key properties, dosing, and research.
Skin & Cosmetic
Nonapeptide-1Immune Support
PGPIPN- 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.
- PGPIPN is a bioactive hexapeptide (Pro-Gly-Pro-Ile-Pro-Asn) derived from beta-casein during enzymatic digestion. It exhibits anti-inflammatory properties via opioid receptor modulation and cytokine suppression, making it relevant for gut health, systemic inflammation, and as a component of casein-derived functional foods.
- Half-Life
- Not applicable (topical)
- Estimated 30-120 minutes (peptide degradation)
- Admin Route
- Topical
- Oral, Subcutaneous (research)
- Research
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- Typical Dose
- 0.05–0.5% concentration in formulation
- 200-500 mg per day
- Frequency
- Twice daily
- Once or twice 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
- Anti-inflammatory effects via cytokine suppression
- Gut mucosal protection and intestinal barrier support
- Opioid receptor modulation for gut motility regulation
- Potential analgesic activity via central and peripheral opioid pathways
- Explored for inflammatory bowel conditions and gut dysbiosis
- Natural origin (food-derived) with favorable safety profile
- Side Effects
- Generally very well-tolerated
- Rare contact sensitivity in susceptible individuals
- Theoretical risk of excessive depigmentation with prolonged high-concentration use
- Generally very well-tolerated given food-derived origin
- Theoretical opioid-mediated constipation at high doses
- Rare milk protein allergy in casein-sensitive individuals
- Stacks With
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