People are misinformed when it comes to acne. certain foods do not cause acne, it is actually caused by hormonal spikes, which would explain why most teenagers suffer from it.
i as an adult suffer from acne, and like you, have tried everything under the sun from proactive to clearasil, to dry ammonia from a dermatologist, i even tried, toothpaste and earwax.
what seems to work for me is tanning, swimming pools, and birth control.
hopefully, atleast one of these suggestions will work for you.