I have proven it.
I did not take garlic for two days even though I was low sugar, my acne came back. Not very bad though, just a few white heads.
Today, I took raw garlic, one big clove, after my morning coffee.
I've also decided that I would not drink coffee more than once a day as it messes up with my bathroom habits. I tend to pee a lot, even during sex/masturbation.
Anyways, I am confident that my face will clear again in a few days.