I have a couple of questions about ingredients in your description. Zinc oxide as you mention tends to be pasty white, like Desitin for diaper rash which uses zinc as one of the active ingredients. This is likely to be a really dumb question with an obvious answer but since zinc has been shown to affect nerves (it is used as an anti-itch ingredient since it tends to dampen nerve responses and can cause nerve damage if dosage is too high) do you anticipate problems with long-term regular usage of zinc as a component of your sunscreen or other products? I believe that since it is already a replacement for the oxybenzone components of earlier sunscreens that you use it since it works. Down the line though, what do you think about the safety of using it?

The other question I have comes from my background as a geoscientist. Your usage of iron oxides for pigmentation seems genius here. Iron oxides occur naturally in shades from bright yellows to reddish-blacks. It seems that using iron oxide as a pigment (mankind has used this for millenia) is the most perfect way to enable exact skin tone matching. My question though is this - in your studies have you found any tendency of the iron oxides to stain clothing on exposure to sweat or through normal wear and tear? I know that iron staining of laundry and porcelain for people who get their water from wells with high iron content is usually addressed in the water softening/conditioning operation before distribution to faucets in the household. Do you anticipate problems with iron staining on clothing? It's a dumb question and probably a non-issue since you have obviously done a lot of work in this space.

Congratulations to you all and best of luck in your efforts to improve and create safe skin care options for people of color.