What red light therapy can and cannot do for hair growth and scalp health, and how it differs from face masks.
Yes — multiple clinical studies show that red and near-infrared light can stimulate hair follicles, increase hair density, and slow hair loss. The mechanism is similar to skin: increased ATP production, improved blood flow, and reduced inflammation in the scalp.
LED caps and combs designed specifically for hair are more effective than face masks for scalp treatment. Look for devices with 630–660nm and 830–850nm wavelengths, and use 3–4 times per week for 10–20 minutes.