This invisible sunscreen slows down skin aging: discover the secrets of DHHB.
UVA rays penetrate clouds, glass, and our skin, triggering silent oxidation that causes wrinkles, spots, and loss of firmness. Faced with this constant danger, a new-generation molecule stands out: Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB) stands out for its ability to form an invisible shield against the entire UVA spectrum. Acclaimed by formulators for its remarkable photostability, it is now the subject of increasingly rigorous regulatory analysis.
- Quick profile
Diethylamino Hydroxybenzoyl Hexyl Benzoate, marketed under the name Uvinul A Plus or Parsol DHHB, is a fat-soluble molecule with a comedogenicity rating of zero.
2. How does it work?
DHHB absorbs UVA energy and then dissipates it in the form of heat or harmless light. This mechanism blocks the formation of free radicals, protects keratinocyte DNA, and preserves collagen. Its structure provides significant photostability: it retains more than 90% of its filtering power after several hours of exposure.
3. Formulatory advantages
- Long-term stability : it remains active without degrading quickly, ensuring consistent protection.
- Universal compatibility : works with organic UVB filters and mineral sunscreens (zinc oxide).
- Lipid solubility : easily blends into the oil phase of emulsions, ideal for water-resistant textures.
4. Safety and regulations
Authorized up to 10 % in cosmetics in most parts of the world (European Union, Australia, etc.), DHHB is considered non-irritating and non-sensitizing at regulatory doses. Toxicological data indicate:
- Very low skin absorption, mainly limited to the stratum corneum.
- Absence of phototoxicity and no genotoxicity detected.
- Inhalation toxicity Pending further studies: caution recommended for sunscreen sprays.
5. Dermatological benefits
- Prevention of photoaging : reduction in wrinkles and spots caused by long UVA rays.
- Anti-inflammatory effect : marked reduction in cases of skin edema.
- Reinforces the skin barrier : affinity with epidermal lipids, limiting dehydration.
6. Environmental impact currently under review
Organic filters are being scrutinized for their effects on aquatic ecosystems. Available data suggest moderate ecotoxicity for DHHB, lower than some previous-generation filters, but research is continuing to confirm its safety for marine fauna, particularly corals.
