The sun - more than just vitamin D!
Longterm study shows the sun increases nitric oxide which in turn lowers blood pressure and increases the vascular blood flow
http://dailytimes.com.pk/infotainment/04-May-16/new-research-reveals-benefits-that-arent-linked-to-vitamin-d-sunshine-cuts-blood-pressure-and-makes-you-thinner

The sun has got his hat on, our moods feel lighter and we are gripped by a desire to soak up some solar rays. But no, we keep being told: the threat of skin cancer makes this potentially lethal.