The answer to this question would be: vitamin D
The UV is needed by the skin to make previtamin D3. Previtamin D3 or cholecalciferol made from the skin will be changed in the liver into 25- hydroxyvitamin D3 and then sent to the kidney to be changed into 1,25- dihydroxyvitamin D3. The last change in the kidney will active the vitamin D. Vitamin D has a role in the calcium absorption which was will strengthen the bone tissue.
Fingers, because people are usually messing with electricity and their fingers are by it.
Ruby Healing Properties. Because the ruby gemstone is a stone of power and vitality its healing powers of ruby<span> helps with every part of the human body. In particular with heart problems, the circulation of blood and the liver. It can help ward of fever by cleansing the blood
hope this helps
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