Don't be afraid of the Sun, but be sensible.
Expose yourself to the sun daily for 20 min when the sun in high, until your skin becomes a healthy pink (while your shadow is shorter than your body height). Because Vitamin D is built on top of the skin, is oil based and absorbed over a period of 48 hours in to the body, you will wash it off if you clean your skin with soap during that time. ( You don't need soap to clean your skin anyway-whatever you want to wash off is water soluble. I have not use anything else than water for over 30 years to wash myself!)
Current research has implicated vitamin D deficiency as a major factor in the pathology of at least 17 varieties of cancer as well as heart disease, stroke, hypertension, autoimmune diseases, diabetes, depression, chronic pain, osteoarthritis, osteoporosis, muscle weakness, muscle wasting, birth defects, periodontal disease, and more.
Clearly sunburn is dangerous and no-one's pretending otherwise. What most don't realise is that while sunburn increases melanoma risk, prudent exposure to sunlight reduces melanoma risk by 15%.
Phillip Day in “The Essential Guide to Vitamin D”
I highly recommend Vitamin D3 supplementation ( www.credence.org Vitamin D3 5000IU). Get your levels checked at your next blood test.