Even before looking at the remedies in that book, it is widely known that diet plays a significant role in the presence of acne. I work with one young man with severe acne. If he completely avoids sugar of all kinds, and makes sure to drink sufficient water everyday, his face clears up completely. It also helps that he never eats out at restaurants, but only eats home cooked food. Also, he does not eat too much meat. He does even better when he eats fruit regularly, especially those that cleanse the blood.

If your case is more severe than this, I would suggest you try the "spots" remedies first. There are three in the book.