Concocted with tranexamic acid, a brightening agent that aims to reduce melasma and hyperpigmentation, this PS… Tranexamic Acid Face Mask makes a great addition to the skincare routine of someone who suffers from dark spots and an uneven skin tone. Housed in a small sachet, this single-use sheet mask can be turned to on evenings where a little TLC is much needed. Pop it on and simply sit back and relax while this mask gets to work.