Assertion: red light's wavelength | /r/CapableOf | hit the skin
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text: Dr. Hamblin explains that wavelengths of natural red and near infrared light are “a very mild form of stress that activates protective mechanisms in the cells...for instance, when longer wavelengths or visibly red light hits the skin, it nudges mitochondria to make energy more efficiently and boost production of healing anti-inflammatories or disease-fighting antioxidants.