I don't understand why literally everyone I know are diagnosed with Vitamin D Deficiency. Even living in sunny California. Wasn't human biology adapted for it in the last 40k years? I understand we spend more time indoors, but literally everyone?
I don't understand why literally everyone I know are diagnosed with Vitamin D Deficiency. Even living in sunny California. Wasn't human biology adapted for it in the last 40k years? I understand we spend more time indoors, but literally everyone?
We evolved to be in the sun for much of the day. We no longer do that. Many of us barely go outside at all anymore. Light skin is an evolutionary adaptation to mitigate the issues related to this in higher latitudes, but it's not match for modern indoor lifestyles.