This is unfair

Have a look at medical medium run by Anthony William. Basically people jave toxicity which is pssed down from parents to children in the form of unhealthy gut bacteria etc. Acne is caused by strep overload in the gut.

Acne is more likely if you consume foods and drinks like soda, white bread, white rice, and cake. Sugar and carbohydrates in these foods enter your bloodstream quickly. This means they have a high glycemic index, which measures how foods affect blood sugar levels.

You have to have the genetic predisposition for acne before any external factors come into play. That's why person A can eat whatever they want without getting acne, whereas person B gets acne when they eat too much sugar, and person C has acne regardless of what they eat.