Many types of fruit grow on vines, most famously grapes and melons, but also more exotic fruits such as kiwis, dragon fruit and passion fruit. Tomatoes are also well-known vine fruits, although many people tend to think of them as vegetables.
As of November 2013, the hottest pepper in the world is the Carolina Reaper. Its rating on the Scoville scale averages at 1.57 million heat units, but it has been recorded as peaking at over 2.2 million SHU.
Both fresh and canned tomatoes do contain citric acid. Similarly, any product that is tomato-based also contains citric acid. If a person is allergic to citric acid, he or she should read the food labels on products to ensure it does not contain this substance.