The effects of light on skin are due to various degrees of absorption of electromagnetic radiation. The visible light spectrum has a 400 nm to 760 nm wavelength. The lighttissue interaction effects are due to absorption and excitation of photons. Once the light reaches the skin, part of it is absorbed, part is reflected or scattered, and part is further transmitted. The structures of the tissue that absorb the photons are known as chromophores that have different wavelengths of absorption.
Once the light is absorbed, the chromophores become excited. The human skin has several major radiation absorbing endogenous chromophores, for instance, among them are urocanic acid, amino acids, melanin and its precursors. But, in this case, exogenous chromophores can be administered to the skin for therapeutic benefit.
X50 Photoglow concept lies in photo modulation which triggers the body to convert light energy into cell energy so cells can be modulated by increasing the energy to the assembly line of fibroblasts to stimulate, for instance, collagen production, regenerate ageing or sun damaged skin, or to use such cell energy to have glowing, radiant skin.
The first law of photobiology states that for low power visible light to have any effect on a living biological system, the photons must be absorbed by electronic absorption bands belonging to some molecular chromophore or photo acceptor.1
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