Foods that are considered low in citrus are actually low in citric acid. Citrus refers to a type of fruit in the Rutaceae family, while citric acid is an organic compound found within the fruit. Citric acid is found in many types of fruits but is also added to numerous other foods during manufacturing, as a preservative. To maintain a diet low in citric acid, avoid all citrus fruits -- lemons, oranges and limes, for example -- as well as most berries, canned tomatoes and wine. Some fruits, such as peaches and fresh tomatoes, contain lower levels of citric acid; bananas, coconuts, mangoes and avocados are a few that contain none at all.
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Bananas, well-known for aiding in digestion, are generally recommended for people with heartburn, flatulence or diarrhea. A smoothie that includes bananas, papayas and ginger is a delicious home remedy for indigestion. In addition to their stomach-soothing properties, bananas are also excellent sources of potassium, a mineral important for heart and muscular function. Bananas contain no fat, cholesterol or sodium and are gentle enough to be used as food for infants.
Mangoes offer a bold tropical taste that many other citric acid-free fruits lack. Mangoes contain significant amounts of fiber, which aids in digestion, and are excellent sources of vitamins C, vitamin A and many other minerals. Because mangoes are tropical fruits, they may only be available during certain times of the year in some areas. Enjoy a peeled and sliced mango by itself, to add a robust flavor to drinks and desserts, or as an addition to a chicken, shrimp or pork recipe.
Popular among sports nutritionists, avocados are dense in nutrients, offering nearly 20 vitamins and minerals per serving. They offer high amounts of vitamin K, folate, potassium and vitamin E and have a gentle, smooth consistency. Pediatrician Bill Sears, MD, co-host of "The Doctors," designates avocados as "an ideal food for babies." For those sensitive to citric acid, avocados make a great substitute for acidic ingredients in many recipes. Instead of using tomatoes, serve a sandwich with avocado slices or snack on acid-free guacamole rather than traditional salsa.
High in fiber, apples and apple juice combat indigestion and constipation. Apples also contain vitamin C, potassium and vitamin A and may reduce the risk of various ailments including obesity and liver problems. Those sensitive to beverages high in citric acid -- soft drinks, coffee and orange juice, for instance -- can enjoy a glass of pure apple juice. Just be sure to check the label for added preservatives.