Sun is the best

• Vitamin D levels produced by the sun last longer than those produced by supplements
• Benefits to Multiple Sclerosis from Sun produced vitamin D are much better than those from supplements
• Sun also produces Nitric Oxide that helps many health problems – such as cardiovascular
• 5 Amazing Properties of Sunlight You’ve Never Heard About
• Health benefit of Sunlight is more than Vitamin D in the blood – many studies
• Light (especially UV) and Health conference – Germany June 2015
• The sun provides more health benefit than vitamin D – Dr. Lucas podcast – May 2015
• 340,000 US deaths annually due to insufficient sun (some due to low vitamin D) – July 2020
• Which Is Worse – Avoiding Sunlight or Vitamin D Deficiency – April 2019
• Nature deficiency leads to disease (less sun, less Vitamin d) – Feb 2019

UV is good too

• UV improves immune system without increasing vitamin D levels in male mice – Sept 2012
• Light (especially UV) and Health conference – Germany June 2015
• UVB produced 8X more vitamin D as solar UV – July 2012 perhaps UV source is better if it has very little UVA
  

Start gradually with the sun/uv and minimize getting even a slight reddening of the skin the next day

• The sun only produces a useful amount of vitamin D when your shadow is shorter than you are.
• Might start the season with just a few minutes of noonday sun
• The more skin exposed, the more vitamin D you will get for the same amount of sun/uv time
• As vitamin D levels build up you are able to handle more time in the sun/uv without reddening