SOME BY MI AHA ∙ BHA ∙ PHA 30 Days Miracle Serum contains 10,000 ppm of Teatree leaf water and 14.77 % of Centella Asiatica Extract. AHA ∙ BHA ∙ PHA remove dead skin cells and impurities and control the oil-moisture balance to help maintain smooth, healthy-looking skin. What’s more, vegetable oil adds a moisturizing sensation. It is free of 20 worrisome ingredients for skin and has even completed a skin irritation test. It has a low-pH formula and it is infused with a patented ingredient that protects the skin, so it can even be used by sensitive skin with a comfortable sensation.