Discussion: Blood tests indicated a deficient level of vitamin D. Should I be exposed to the sun or use supplements as suggested to me?

Controlled exposure to the sun has additional benefits beyond the immediate production of vitamin D3. Controlled exposure to the sun, given appropriate safety rules (including wearing a hat and sunglasses), is recommended for patients with autoimmune diseases.

The sun is the source of life on earth. People mistakenly avoid controlled sun exposure! Most people today have a chronic vitamin D deficiency. The additives are not absorbed as in the natural fortification of sun exposure. Vitamin D3 is a cholesterol derivative and has a far-reaching effect on the immune system, as many recent studies have shown in the context of the coronavirus.

Link: Vitamins D3, B12, and Omega-3 are critical for proper immune function.
https://www.sf-healing.com/page/135 (Copy & Paste)