Acidic liquid environments exist when the measured pH is below the neutral value of 7, whereas a pH above 7 is considered basic, or alkaline. The natural pH of our bodies is slightly alkaline and hovers around the range of 7.35 to 7.45. Since most of our biological processes occur in the slightly alkaline range, acidic substances threaten to lower the pH, potentially harming these natural processes. While still highly debatable, some organic food proponents have suggested that a diet lower in acidic foods and richer in alkaline foods improves the functioning pH of the body thereby improving overall health.
Fruits and Vegetables
You would be hard-pressed to find any expert or diet-fad supporter who would not agree that a healthy diet should be rich in fruits and vegetables. There are some differences in the pH of fruits and vegetables; some are more alkaline than others. The highest alkaline fruits include apples, bananas, grapes, peaches, dried apricots, figs, dates and raisins. Cranberries and blueberries are among the acidic fruits. Vegetables that are considered alkaline include dark leafy greens, broccoli, beets, cabbage, spinach, onions, peas and some squash varieties. Corn and olives are acidic.
Protein Sources
Nearly all animal-derived protein sources are considered acidic. Protein sources that are alkaline include almonds sunflower seeds, eggs, fermented tofu and whey, and chicken breast. While it would seem that the relative selection of alkaline protein sources are limited, most proponents of alkaline-based diets acknowledge that a diet should not be entirely alkaline, but should be a balance in which the majority of the food source is alkaline.
Drinks
Some bottled water companies market alkaline water, which is more alkaline than regular tap water. Other alkaline-related beverages include fresh fruit and vegetable juices, unpasteurized organic milk, green tea and most herbal teas. Acidic beverages to avoid include alcoholic soft drinks.
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