I battled with painful cystic acne throughout my life. It went away when I was on birth control, but came back when I went off.
A year ago at the age of 33, I finally found the answer that cured my acne- high doses of vitamin b5 pantothenic acid. I started out by taking about 8 500mg tablets a day. I learned about it from a mom on a YouTube video who cured her son's acne this way. I couldn't believe that it worked. Within about 1 month all of my acne was gone. This had never happened in all of my adult life! Now about a year later, I still take it but around 3-4 tablets a day and my skin is 100% clear. Once in a blue moon, I will get a small pimple pop up and I notice if I take a high dose of vitamin b5 it goes away in about 1-2 days.
This has never happened to me before, even with I was on birth control I still had a pimple here and there. And also I tried EVERYTHING you could imagine - even went 100% vegan and mostly raw for 6 months and it barely changed a thing. This supplement is the only thing that finally cured me. I hope that helps!