Blackheads often form from pores that are clogged by dirt or other grime. Many people can keep their pores clean with regular washing, but some need to wash a bit deeper. For this type of person, this blackhead clearing scrub is designed to give a deep cleaning to the pores, removing the clogs so that the pores can work effectively. Based on this, it is effective for many who have problems with blackheads. However, it may not be best for everyone, particular those who have a lot of problems with bad acne. But for someone with light acne, the effectiveness combined with the lower price of an off-brand product make this particular product a good deal and worth the investment. Side Effects Personally, I have never suffered from side effects through the use of this product. However, warnings should be heeded, and something like side effects can vary from person to person. Immediacy This works as quickly as any other alternative.