Red light therapy has come a long way since then. Rahman explained that red light wavelengths activate the mitochondria in skin cells and increase blood flow to hair follicles. This uptick in stimulation encourages mitochondria to increase their production of adenosine triphosphate (ATP), which promotes new growth. When it comes to efficacy, we noted that iRestore Elite is FDA-cleared. This is a designation bestowed on moderate-risk tools that are sufficiently similar to other cleared devices already on the market. There are specific pathways that devices must follow to obtain FDA clearance, and the iRestore Elite was cleared through the FDA’s 510(k) premarket evaluation. There are three hair-growth devices in iRestore’s lineup: the entry-level Essential ($499), the mid-tier Professional ($899), and the Elite ($1,899). Each contains iRestore’s “Lumitech” technology, which combines LED lights and medical-grade lasers. These laser diodes are proprietary to iRestore and are called Vixo lasers, operating in the 655- to 680-nanometer (nm) range. (Preliminary studies with mice have shown that using red light in the 600- to 660-nm range, and infrared wavelengths in …