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Health advocates urge US regulators to ban common food coloring additive, by Tom Perkins, The Guardian, June 2, 2023

It’s true that titanium dioxide does not rank as high for UVA protection as zinc oxide, it ends up being a small difference (think about it like being 10 years old versus 10 years and 3 months old). This is not easily understood in terms of other factors affecting how sunscreen actives perform (such as the base formula), so many, including some dermatologists, assume that zinc oxide is superior to titanium dioxide for UVA protection. When carefully formulated, titanium dioxide provides excellent UVA protection. Its UVA protection peak is lower than that of zinc oxide, but both continue to provide protection throughout the UVA range for the same amount of time.

In order to achieve the same solids content, the larger filler and the binder should be reduced if necessary.  

Because beauty should never come at the price of your health.