SOME BY MI 30 Days Miracle Serum, an acne reducing, oil balancing, dead skin removing serum that works miracles in combating acne and blemishes. Using a combination of AHA, BHA and PHA, this serum is the best friend of oily and acne-prone skin types. With 14.5% Centella Asiatica Extract, this serum is also calming on sensitive skin.