What is the purpose of light therapy (phototherapy)?

Light therapy, or phototherapy, primarily serves to treat skin conditions such as wrinkles and pigmentation issues. The treatment utilizes specific wavelengths of light to penetrate the skin, stimulating cellular processes that promote healing and regeneration. This includes enhancing collagen production, which helps to diminish the appearance of fine lines and wrinkles and can even out skin tone by targeting pigmentation irregularities.

While other options suggest benefits related to aesthetics or health, they do not encompass the broader applications and scientifically supported uses of light therapy in skincare. For instance, enhancing color in the skin or focusing on hair reduction does not fully capture the comprehensive benefits light therapy offers, particularly with its established role in improving skin texture and tone. Similarly, increasing muscle mass does not relate to the impact of light therapy on skin conditions. Thus, the purpose of light therapy primarily revolves around treating wrinkles and pigmentation effectively, making this the correct choice.