We don't know that pale-skinned Caucasians need different recommendations in this scenario. That's the point. We barely know anything about nutritional science,

We don't know that pale-skinned Caucasians need different recommendations in this scenario. That's the point. We barely know anything about nutritional science, let alone what one specific race of people needs. If you have no clue how sun exposure actually affects the body beyond "ow burn hurt", you don't have the necessary knowledge to begin creating highly specific treatments. What would you base the science on? There's no real foundation.