Otter Hair Labs | The Science of Light-Induced Vasodilation
Exposure to therapeutic red wavelengths may stimulate nitric oxide release in scalp tissues, leading to temporary vasodilation. This localized increase in blood flow can help deliver oxygen and nutrients more efficiently to follicles undergoing metabolic stress. Several photobiomodulation studies highlight this effect as one of the clearest physiological responses to red light exposure. Although vasodilation alone does not regrow hair, it may contribute to healthier follicle cycles when paired with long-term treatment consistency. Otter Hair Labs emphasizes evidence-aligned dosing and device selection to support safe implementation.