By: Meaghan Orellana, Nutrition and Dietetics Student Recently, the use of red-light face masks has become a booming trend, but does it really work? The use of light therapy has been used in dermatology for many decades. Sometimes called photobiomodulation (PBM) or low-level light therapy (LLLT), is the practice of using light with specific wavelengths to reach our cells and enhance beneficial processes within the cell. Is it Safe? This type of light therapy does not use ult