For twenty years I had deep nodule type acne with scars to prove it. Tried everything and had varying degree of success but nothing compared to this new find:

Indian Bitter Melon from the local asian grocery store. I eat a 1/2"x2" piece raw twice a day and these things go away quick and stay away for a long time!

I can't believe there are no other posts about it. I know it may not be locally available in many areas though. Try to find it.