The highest acidic fruit is generally considered to be lemons, with a pH level ranging from 2.0 to 2.6.
Here are some other highly acidic fruits:
- Limes: pH level of 2.0 to 2.4
- Grapefruit: pH level of 3.0 to 3.3
- Oranges: pH level of 3.3 to 3.8
- Cranberries: pH level of 2.3 to 2.8
It's important to note that the pH levels of fruits can vary depending on factors such as ripeness, variety, and growing conditions.