1. White sugar
Sugar is found everywhere; in soft drinks, candies, snacks, pastries and fast foods to name but a few. It can result in tooth decay and is linked to type 2 diabetes along with a higher risk of obesity and heart-related diseases. In 2011, Lustig and Garber conducted a study to find out if fast food was addictive when soda was included. They saw that the sugar intake increased ten-fold when soda accompanied fast food.