PSA Blemish Recovery Booster Serum, 0.5 fl oz. This versatile booster brightens and soothes, providing a bit of extra TLC when it comes to battling blemishes and keeping your skin nourished. A mix of 2% BHA, 1% Bakuchiol, 2% Zinc PCA, and Licorice Root Extract helps to get to the root cause of existing imperfections. They also brighten and soothe while keeping your skin nourished. Bakuchiol's unique multitasking properties reduce the appearance of all imperfections, and Willow Bark and Licorice Root Extracts brighten the appearance of post-acne scars and the appearance of dark spots. If you feel a spot coming on, this is your ally. Recommended for: All skin types — especially breakout-prone and dull with excess discolouration. pH: 3.2 - 4.1 CAUTION Do not use with other products containing BHA, as 2% BHA is the maximum amount of BHA you should apply in a single routine. Excess use of BHA may result in dryness and irritation.