Try cutting out all sugar, trust me
I had tried absolutely everything, all prescription and non prescription products for acne, including laser and Isotretinoin, nothing worked till i cut all sugar.
I used to have painful, frequent, and severe cystic acne, now I have had one or two new non cystic pimples in the last month
seriously try it its worth it and if it doesn't work for you theres nothing to lose anyway
when i say all sugar i mean everything though, I don't even eat white bread because of the sugar level or even ketchup
let me know if it works for you