Hey thought i share what's been causing my acne for last 15-20y since i'm now 100% sure.

I thought is was chocolate(cocoa), milk, cheese, fat blabla all these years.

Problem was Rennet.

It's really easy to try this diet.
Eat or drink anything but diary or things containing diary.

However, Cream cheese and cream is allowed since no rennet in those.
Dark chocolate 80%+ i can eat loads of, but not milk chocolate.
Be careful and read the labels if there are milk products in the foods you eat, since even the slightest rennet like in some potato chips varieties will give a trigger here.

Try it if your acne is still a mystery, you got nothing to lose!

Let me know how it goes.