This is really good for acne marks and for people with oily skin. My acne marks have become at least 40% less visible in a month. Use it twice a day, in the morning and at night. Cleanse > niacinamide Serun > moisturise. I received the original product in environment friendly packaging. Very little plastic was used. Even the bottle is made of glass. If you are already using some other serum please do some research and check if you can use niacinamide acid along with your existing serum.