Most people love eating fruits: they're sweet, juicy and can be a healthy source of high vitamin C. However, because fruits and fruit drinks can be very acidic, consuming highly acidic foods and drinks every day can harm teeth without the right aftercare. Eating acidic fruits — and other foods — can eventually cause tooth enamel to wear away, leading to things like dental erosion and tooth sensitivity. You can still reap the benefits of eating the healthy foods you love by being aware of acid's effect on your teeth — and caring for your dental health accordingly!
The pH scale ranges from 0 to 14 and measures the level of acidity or alkalinity (also known as basicity) of a substance, whether a food, liquid or the saliva in your mouth. Substances that fall below a pH of 7 are considered acidic and those above 7 are alkaline.
When at rest or when you're not eating or drinking, your saliva should stay close to the neutral range of 6.5 to 7.5 pH. This prevents acid from eroding your enamel and contributing to tooth decay.