Zinc Oxide Micronized in Gel Formulations

Regarding the use of Zinc Oxide (Micronized) in a gel formulation, it will result in a white and opaque gel, not a clear one.

Zinc Oxide is a physical ingredient that functions by sitting on the skin's surface and reflecting UV rays. It is a solid powder and does not dissolve in cosmetic formulations, including gels. When added to a gel, the fine particles of Zinc Oxide remain suspended (dispersed) within the gel matrix. These dispersed solid particles scatter light, which is what makes the formulation appear white and opaque.

This is consistent with the staff's reply, which correctly states that physical sunscreens like Zinc Oxide cannot dissolve in formulations, leading to an opaque white appearance rather than a clear one.