7-Dehydrocholesterol
What is 7-Dehydrocholesterol?
7-Dehydrocholesterol is a naturally occurring sterol and provitamin D3 precursor abundant in the epidermis. Chemically, it belongs to the cholesterol family of lipids, often derived synthetically or from natural sources for cosmetic use. In skincare formulations, it primarily acts within conditioning products like creams and lotions. It functions by replenishing skin lipids to enhance barrier integrity, adjusting product thickness for optimal spreadability and feel, and reinforcing emulsion structures to maintain product stability over time. Its photolabile nature allows absorption of UVB rays, potentially contributing to mild photoprotective effects through conversion processes inherent to skin biology.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Supports skin soothing by mimicking natural lipids.
Provides UV absorption as a provitamin.
Enhances softness, smoothness, and formula stability.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People with dry or barrier-compromised skin. | Those with known sterol sensitivities. |
| Individuals exposed to sunlight regularly. | People experiencing lipid intolerance. |
| Users preferring stable, textured skincare products. | Individuals preferring minimalist formulas. |
Safety Notes
- Low hazard rating from safety assessments.
- Non-comedogenic, suitable for acne-prone skin.
Frequently Asked Questions about 7-Dehydrocholesterol
What role does 7-Dehydrocholesterol play in cosmetics?
It conditions skin, controls viscosity, and stabilizes emulsions for better product performance.
Is it safe for sensitive skin?
Evidence shows low irritation potential and safety in typical concentrations.
Does it help with sun exposure?
It absorbs UVB due to its provitamin nature, supporting skin's natural response.