Obesity can lead to a number of health problems including diabetes, heart disease and strokes. One issue that can easily be tackled is to stop drinking sugary beverages. A 20-ounce bottle of cola contains 65 grams of sugar—five times as much as a typical glazed donut. Even things that you think are healthy might be a bad choice. Store-bought orange juice has as much sugar as soda! Try switching to sparkling water with lemon or making your own iced tea.