I suffered heavily in my teenage years and only a little in adult years. Diet does make the biggest difference in the adult years especially with healthy eating.
In my case what helped in the teenage years was ro-accutane prescribed by the doctors and then getting rid of the acne scars later in life I had a few fraxel laser treatments. Using papaya soap once in a while also helps with deeper cleansing.
It's probably the biggest problem with acne, that there isn't a one recipe that helps to all. For some people drinking a lot of water is enough, but some need to fight it very seriously.
I'm more in the middle range, without dairy I got acne under control, not that my skin is completely perfect, but not that bad as it used to be.
Haven't heard about papaya soup, thanks for sharing! :)