Photoaging and different wavelengths of light from the sun
Until now, skin photoaging was thought to be due to the effects of the UV rays in sunlight, but recent research has revealed that NIR rays are also involved in this process. The longer the wavelength of light, the more it penetrates deep into the skin and body. NIR rays have a longer wavelength than UV rays and reach the deeper layers of the skin (the dermis), subcutaneous tissue, connective tissue (fascia) and muscle layer, causing wrinkles and sagging. To prevent this, it’s important to take measures to protect against not only UV rays but also NIR rays.