Discussion: Vitamin D3 is critical for proper immune system functioning.

It is advisable to incorporate controlled sun exposure with natural foods containing vitamin D3 to prevent vitamin D3 deficiency. Vitamin D is a cholesterol derivative; its importance for the immune and hormonal system has been known for many years.

Moderate exposure to the sun has many benefits. (Suntanning is not the cause of skin cancer!)
Creates natural vitamin D. (Essential.)
Elevates testosterone (The male sex hormone), Thus improving erection. Women do not have masculine side effects.
It helps relieve pain.
Charges the Qi energy.
It helps relaxation and improves sleep.
It promotes good moods and prevents depression.
Rejuvenates scar tissue and skin problems. (Depending on the stage.)
Controlled sun exposure has additional benefits beyond vitamin D3 production.

Link:
Vitamins D3, B12, and Omega-3 are critical for proper immune function.
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