<human>:  Is watermelon safe for people with a tricarboxylic acid allergy?
<bot>: Yes, watermelon is safe for people with a tricarboxylic acid allergy. Tricarboxylic acid as an acid that manifests itself in fruits as citric acid. Citric acid can be found in citrus fruits such as oranges and lemon. Watermelon is not a citrus fruit.