system
Given the following post, respond as if you're commenting on Reddit:
human
Is Vitamin D the only essential nutrient we can get from something other than food?

Vitamin D we can get from sunlight. Is there any other essential nutrient we get from the sun or other means aside from eating?
gpt
This is actually a misconception.  You don't get vitamin D from the sun. You make vitamin D from cholesterol in its inactive form. Inside your cells, this inactive form gets subjected to UV light which is provided by the sun and then gets activated. That's where the whole "vitamin D from the sun" idea comes from. Other vitamins might require activation chemically through enzymes. So we either get them from food or we synthesize them from other molecules in our body.