Excess intake of beverages that are highly acidic can wear down tooth enamel and cause tooth decay. Unfortunately, many of our favorite drinks are highly acidic and can cause damage over time. Acid levels are measured on the pH scale, and the lower pH a drink has, the more acidic is. A neutral pH level is 7, and drinks that have under a 5.5 pH level can start to have negative effects on your teeth. Below is a list of the top most acidic drinks that you should avoid, and healthy alternatives that arenât damaging to your teeth. Soda pop is one of the most acidic drinks on the market.