BIS-SH-PENTAPEPTIDE-5 PORPHYRA 334 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
BIS-SH-PENTAPEPTIDE-5 PORPHYRA 334
Porphyra 334 Peptide
Safety grade: A
This is a plant-derived peptide (small protein fragment) extracted from red algae that naturally protects the plant from sun damage. It's been engineered to be more stable and effective in skincare products.
It works as a natural sunscreen and antioxidant to protect skin from UV damage and free radicals while also keeping the product stable and preventing ingredient breakdown.
Graded using: COSING.
Last verified: May 26, 2026
Other Antioxidant ingredients
- TOCOPHEROL — Grade A
- TOCOPHERYL ACETATE — Grade A
- BHT — Grade C**
- ASCORBYL PALMITATE — Grade A
- HYDROXYACETOPHENONE — Grade A
- PENTAERYTHRITYL TETRA-DI-T-BUTYL HYDROXYHYDROCINNAMATE — Grade A
- ASCORBIC ACID — Grade A
- CAMELLIA SINENSIS LEAF EXTRACT — Grade A