Source: Natural.

Traditionally, tranexamic acid is actually a drug which has been used in surgery to stem bleeding, also studies show that it has a positive impact on melasma and hyperpigmentation. It is safe to use for all skin types and skin colors. Tranexamic acid provides a powerful and specific anti-inflamatory action, inhibiting tyrosinase synthesis in melanocytes to keratinocytes in the epidermis. Also it calms the skin and helps to restore the skin barrier. In fact, tranexamic acid decreases the skin's sensitivity to UV.