Overview. Astaxanthin (C40H52O4) is a red-orange xanthophyll carotenoid responsible for the distinctive pink-red color of salmon, trout, shrimp, and flamingos — all of which obtain it from algae. The richest natural source is the freshwater microalga Haematococcus pluvialis, which accumulates astaxanthin up to 4% of its dry weight as a survival mechanism under intense light and nutrient stress. YaoSynBio supplies natural astaxanthin in multiple grades: algal powder (≥2%), water-soluble formulation (2%), and oil-soluble oleoresin (≥5%), all derived from cultivated H. pluvialis under controlled, contaminant-free conditions.
Mechanism of Action. Astaxanthin's molecular structure — with polar keto-hydroxyl end groups on both sides of a long conjugated double-bond chain — allows it to span the entire lipid bilayer of the cell membrane, anchoring at both the inner and outer surfaces while the conjugated chain guards the hydrophobic interior. This unique “membrane-spanning” geometry lets it quench free radicals both inside and outside the cell simultaneously, without becoming a pro-oxidant. Its singlet-oxygen quenching capacity is measured at up to 550 times that of vitamin E, 10 times that of beta-carotene, and far exceeds vitamin C. In skin, it suppresses UV-induced oxidative stress and matrix-degrading enzymes, reduces wrinkle formation and loss of elasticity, improves moisture retention, and provides broad anti-photoaging protection. As a carotenoid pigment, it also delivers a stable, natural red-orange hue.
Applications. Astaxanthin is a hero active for premium anti-aging serums and creams, antioxidant oils, after-sun and urban protection products, and beauty supplements (softgels, powders, functional beverages). Its natural red-orange color makes it a valued clean-label colorant for cosmetics, food, and feed. The oil-soluble grade suits anhydrous and emulsion systems; the water-soluble grade enables toners, essences, and beverages. Regulatory status: approved food additive E161z in the EU and compliant with EC 1223/2009 for cosmetics; FDA GRAS and DSHEA-approved for dietary supplements in the US..
| INCI Name | Astaxanthin |
|---|---|
| CAS No. | 472-61-7 |
| Molecular Formula | C40H52O4 |
| Appearance | Deep red to red-orange powder / oleoresin |
| Available Forms | Powder ≥ 2% · Water-soluble 2% · Oil-soluble ≥ 5% |
| Recommended Dosage | 0.01% – 0.1% (cosmetic, as pure astaxanthin) |
| Storage | Store sealed, cool and dark, under inert atmosphere; protect from oxygen, heat, and light to prevent oxidation |
| Source | Haematococcus pluvialis (rain algae / freshwater microalgae) |
| Key Benefits |
