Ultraviolet
Yes, They are essential to good health, since they cause vitamin D to be formed in the body, and assist in the build-up of calcium and phosphorus. All of these substances are vital to the formation and maintenance of healthy teeth and bones.
"enables" in what way? If you mean production of vitamin D and causes tanning it is UV.
UV rays cause you to tan
Tanning is a result of exposure to sun rays. When skin gets exposure to UV rays melanin production increases. There are number of methods to remove tan, but it can take long.
Ultraviolet rays are responsible for vitamin D production. Without sunlight, our bodies have a marked deficiency. The overuse of sun block can actually be unhealthy in this regard.
Its been in a trend in other countries now a days to get TAN. An accelerator tanning lotion is one that accelerate the process of tanning. It helps sun rays to increase the production of melanin in the skin greatly.
No, the process listed is true for vitamin D, not vitamin C.
Tanning refers to the darkening of skin . Tanning is mainly due to exposure to sun rays . And no oven can not be used for tanning.
Daily exercise will assist with the production of vitamin D, but in order to get it more proficiently, your skin will absorb the Sun's rays. Now this can be good, but also be bad. For instance, you could develop skin cancer.
that's too easy
Although it is widely known that UVA and UVB rays, whether directly from the sun or in the confines of a tanning booth or bed, can be extremely dangerous when the body takes an excess amount in. With this in mind, there are actually numerous advantages to indoor tanning. First of all, those rays help the body to make a sufficient amount of vitamin D, which is a necessary nutrient used in combination with calcium to keep bones strong. Secondly, the benefit of using indoor tanning units is that you can control exactly how long you will receive those rays, versus being out in the sun and not knowing exactly how strong those rays are and not always being able to get out of the sun immediately.
Ultra Violet Rays, which are very harmful.