An active serum to brighten the skin, reduce pigmentation and dark spots with 2% of XS hyaluronic acid and 1% of tranexamic acid. Traditionally, 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. Tranexamic acid decreases the skin's sensitivity to UV. The serum can be mixed in any proportion with other mixlab serums to create a personalized formulation with additional benefits. It can also be added (2 doses) to the hyaluronic mixmask.