Which of the following foods is known to acidify urine?

Cranberry juice is well-known for its ability to acidify urine primarily due to its high levels of ascorbic acid, commonly known as vitamin C, and other organic acids. When consumed, these acids are metabolized in the body, resulting in a more acidic urine pH. This effect is beneficial for preventing urinary tract infections (UTIs) as the acidic environment can inhibit the growth of bacteria.

In contrast, other juices like orange juice and pineapple juice tend to have more neutral to alkaline effects on urine. Tomato juice, while it does contain some organic acids, does not have the same significant impact on urine acidity as cranberry juice. Therefore, when considering which food specifically promotes urine acidification, cranberry juice stands out as the most effective option.