Why is ultra-violet radiation beneficial in beauty therapy?

Ultra-violet radiation is beneficial in beauty therapy primarily because it offers a chemical effect on the skin. This type of light is known to induce certain chemical reactions in the skin that can lead to various positive outcomes, such as enhanced vitamin D synthesis and improved skin tone. The chemical effect can stimulate the production of collagen and elastin, promoting healthier skin and potentially addressing issues like acne or other skin blemishes. This biochemical stimulation can lead to rejuvenation of the skin, providing both aesthetic and therapeutic benefits.

Other options do not accurately reflect the effects of ultra-violet radiation in beauty therapy. For example, ultra-violet radiation does not provide cooling effects, nor does it absorb moisture in the skin. Additionally, adding weight to the skin is not a recognized benefit or characteristic of UV exposure; instead, the focus is on the skin's responses to UV light.