Sunscreen Formulation: BEMT vs DHHB vs SPF Protect Ultra™ II

Regarding your question about formulating sunscreen using BEMT and DHHB versus SPF Protect Ultra™ II, and which offers higher quality, here's a breakdown:

Based on the composition and descriptions, SPF Protect Ultra™ II is designed to provide higher overall quality in terms of sun protection performance and texture compared to using BEMT and DHHB alone. SPF Protect Ultra™ II is a blend that includes BEMT, DHHB, Octyl methoxycinnamate, Ethylhexyl Triazone, C12-15 Alkyl Benzoate, and Neopentyl Glycol Diheptanoate. This combination of multiple filters offers more comprehensive UVA/UVB protection. Furthermore, the blend is formulated to be lightweight and non-greasy, aligning with your preference for a fast-drying texture.

Using SPF Protect Ultra™ II at recommended concentrations (e.g., 15% for SPF 50, PA++) is an effective way to achieve high-level protection with a desirable feel.

For specific formulation examples using SPF Protect Ultra™ II, you can refer to the sample formulas provided on the product detail page for SPF Protect Ultra™ II.

Adding Other Ingredients (Carrot Extract, Milk, Fragrance)

You can technically add ingredients like carrot extract, milk, or fragrance to a sunscreen formula, provided they are compatible with the other ingredients and the formula's pH is suitable. However, it's important to consider the impact on the final product's texture and feel.

Adding nourishing ingredients like carrot extract or milk can potentially make the sunscreen feel heavier or more sticky, which might counteract your goal of a lightweight, non-greasy finish. If you choose to add them, start with low percentages and test for compatibility and texture. The appropriate amount would depend on the specific extract or ingredient and its concentration.

Fragrance can generally be added to mask odors or provide a pleasant scent, but ensure it is compatible with the other ingredients and does not cause instability or irritation. Again, start with a low percentage (typically 0.1-0.5% for fragrance) and adjust as needed.

Keep in mind that adding additional ingredients requires careful formulation and testing to ensure stability, efficacy, and desired sensory properties.