It has been known that drinking a lot of soda's will cause acne. I drink a lot of sodas myself nd have a little bit of acne around my forehead nd facial. Soda has acid and is an carbonated beverage  which is why people gain more weight just from drinking soda. Soda also stains teeth most likely colored sodas (ex. pepsi). The darkness from the soda takes away that beautiful white pigment of your teeth and thats why its harder to make your teeth bright and white no matter how much you brush them.  To still have the whiteness of your teeth when drinking soda use a straw . To stop acne stop drinking soda as much. For all you soda lovers limit yourslef from the things soda can do.