I bought the travel size to take on vacation for my daughter! I have used it on her for a while. She's 11 years old, and with puberty in full swing she sometimes gets pimples. This serum gets rid of her acne without irritating her sensitive skin or leaving behind marks. This serum is yet another reason why I am so loyal to the Okoko brand! It's another incredible product that works with real ingredients, not harmful toxic chemicals. Thank you.:heart: