Question

Lack of sunlight can lead to stress and what type of condition?

Answer 1

Vitamin D-3 is what humans synthesize from the sunlight. Vitamin D-2 is what is needed in the diet. So, if you have a lack of sunlight, you would probably end up with vitamin D-3 deficiency, which would result in conditions along the lines of asthma, cognitive impairment, cancer, and others.