It's more like a lifestyle with some supplements: almost no sugar, no chocolate (it makes me break out everytime!), almost no saturated fats (haraburger stuff and such), limit alcohol consumption, eat lot of fruit/vegetables. This corabined with Omega-3 (about 3g a day) and Zinc (about 50 mg a day) supplements.
My zinc pills have Vit A and B5 added because they help absorb and transport the zinc better. Important note: I take the biological form of zinc (L-5-oxo-proline), which is loaRAB better than other forms of zinc. You have to take about 2mg of copper, because high intake of zinc will give you a copper deficiency.
Omega-3 does A LOT for me. But it's important you keep your diet healthy, because if you eat too much saturated fats (= everything that tastes great like cookies, haraburgers, sweets, pizza, fries, ...), the Omega-3 essential oil will not be absorbed and it won't do anything.
Anyway, this method works absolutely great for me, but everyone is different, so it may not work for you. Acne is a very complex disease with many factors that influence it. So I can only speak for myself and hope it works for someone else. Btw, the benificial effects of zinc on acne have been scientifically proven.