[throwaway74628]

Slathering oneself in mud if you need to endure harsh sun exposure is the most common answer I’ve seen to this question. Otherwise, I agree with your comment, the “best practice” of avoiding sun exposure is as unintuitive as the grain-heavy food pyramid.

[jerlam]

That food pyramid hasn't been recommended in 20 years.

[throwaway74628]

That’s my point.