Chemical Sunscreens

Chemical UV filters (like Avobenzone, Octocrylene, and Homosalate) work by absorbing UV rays and converting them into heat, which is then released from the skin.

Pros: They are typically lighter in texture, leave zero white cast, and are easier to formulate into elegant, watery serums. Cons: The heat conversion process can leave heat-sensitive skin looking redder, and some people find it makes uneven tone more noticeable. Some chemical filters are also known skin sensitizers.

Mineral Sunscreens

Mineral UV filters (Zinc Oxide and Titanium Dioxide) work primarily by absorbing UV rays (and reflecting a small amount of them) while sitting on top of the skin.

Pros: They are inert and highly tolerated by sensitive, eczema-prone, and rosacea-prone skin. Zinc Oxide also possesses natural soothing properties. Cons: They are inherently thick white powders, meaning they can leave a chalky "white cast" on the skin and feel heavier or more occlusive.

Our Approach

When formulating the Iduna Tinted Sunscreen, we chose a 100% mineral approach using Zinc Oxide. To counteract the inherent white cast and heavy texture, we utilized advanced dispersion technology to micronize the zinc, and we added sheer, adaptive iron oxides (tints) to neutralize any remaining chalkiness, resulting in a breathable, skin-like finish that protects even the most sensitive skin.