Cassiaside is primarily used in the cosmetic and personal care industry for its skin-lightening properties. It functions by inhibiting tyrosinase, an enzyme involved in melanin production, which helps reduce hyperpigmentation and promote an even skin tone. Due to this action, it is commonly formulated into creams, serums, and lotions aimed at treating dark spots, melasma, and post-inflammatory hyperpigmentation. It is considered a milder alternative to hydroquinone, making it suitable for sensitive skin types. Additionally, cassiaside is explored for its antioxidant activity, contributing to anti-aging formulations by helping protect skin from oxidative stress caused by environmental factors.