Although sugar is bad for your teeth it is not the only villain that undermines healthy teeth. Acidic, low-pH foods such as sour candy, soft drinks, and fruit juices will also soften teeth. Too much of these types of food can result in enamel erosion and diminished tooth size.
Dentist warn to stay away from ultra-sour, ultra-sticky, ultra-sugary candies such as Warheads and Toxic Waste. However even sour gummy vitamins can be culprits. It is suggested that if you are going to consume highly acidic foods, do it during mealtime to help minimize the effects by consuming them along with other foods.