There are many fruits that have citric acids. Fruits that include citric acid are mostly citrus fruits. Those fruits include grapefruit, lemon, lime, tangerine/mandarin orange and oranges.
White, star ruby and pink/red are the major well known grapefruits. The three all include a "tangy-sweet flavor." There are more vitamins in the pink and red grapefruit.
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The lemon was first found in China.There are sweet and acid lemons. There are two man common acid lemon selections available they include lisbon and eureka lemons.
Limes or Citrus Aurantifolia are another fruit that have citric acid. They have also helped for better health including digestion, gout and scurvy.
Tangerine or mandarin oranges have skin that is thin and is easy to peel. The are often called "kid-glove."
Many people get their source of vitamin c from oranges or orange juice. Oranges contain potassium, citric acid, niacin, magnesium, calcium, thiamin and folacin.