The INKEY List Mandelic Acid Treatment. A gentle yet powerful treatment that helps to significantly reduce hyperpigmentation and fade marks caused by blemishes or breakouts.Gently Evens Skin Tone. With a powerhouse of ingredients, this lightweight formula noticeably reduces dark spots and post-acne marks. It’s safe for all skin types, including sensitive skin.Powerful Ingredients, Real Results. 10% Mandelic Acid (an AHA) reduces dark spots and acne scars. Retinol increases natural cell turnover to fade discoloration. Glycerin deeply hydrates skin and draws in moisture.