I’ve kept my low GI diet and suddenly this week, two weeks after i started, I see changes, good changes. Oh and remember i said i didnt have acne before on my face? well i did have mild acne on my back..guess what, its almost gone. I am a big supporter of food playing a huge role in acne. My theory about myself is that the heat and air at work made for a perfect bacteria breeding area on my skin, and once the “infection” had settled, food made the inflammation worse. So even tho my face has never been affected by what I ate before, at least as i’ve noticed, it does now.
I've read a lot of contradicting information online including how overloading the body with vitamins makes them hard to process and so the byproducts/toxins come out of the skin to suggestions that they impact hormones which are in turn causing the breakout. Vitamin D is not actually a vitamin but is instead hormone, which will definitely affect hormones and possibly acne. "Vitamin D is not technically a vitamin, ie, it is not an essential dietary factor; rather, it is a prohormone produced photochemically in the skin from 7-dehydrocholesterol."
It is widely suspected that the anaerobic bacterial species Propionibacterium acnes ( P. acnes ) contributes to the development of acne, but its exact role is not well understood.  There are specific sub-strains of P. acnes associated with normal skin, and moderate or severe inflammatory acne.  It is unclear whether these undesirable strains evolve on-site or are acquired, or possibly both depending on the person. These strains have the capability of changing, perpetuating, or adapting to the abnormal cycle of inflammation, oil production, and inadequate sloughing of dead skin cells from acne pores. Infection with the parasitic mite Demodex is associated with the development of acne.   It is unclear whether eradication of the mite improves acne.