D-α-Tocopherylquinone is primarily used in skincare and cosmetic formulations due to its antioxidant properties. It helps protect the skin from oxidative stress caused by environmental factors such as UV radiation and pollution. This compound is often included in anti-aging products because it supports skin repair and reduces the appearance of fine lines and wrinkles. It also stabilizes other active ingredients in formulations, enhancing product shelf life and efficacy. In pharmaceutical applications, it serves as an intermediate in metabolic pathways related to vitamin E, contributing to cellular protection against lipid peroxidation. Its role in redox processes makes it valuable in research settings focused on oxidative damage and neurodegenerative diseases.