Cranberries (Vaccinium macrocarpon) are the fruit of a plant native to North America. Often consumed whole, cranberries are also available in juice or supplement form.
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Although research on cranberries’ health effects is limited, studies suggest that cranberry products may help treat the following:
1. Infections of the Urinary Tract
A number of studies have shown that regularly drinking cranberry juice (or taking cranberry supplements) may help prevent urinary tract infections. Research indicates that substances found in cranberries may prevent bacteria from clinging to cells along the walls of the urinary tract and causing infection.
If you think you have a urinary tract infection, contact your healthcare provider for proper diagnosis and treatment. Infections should not be self-treated with cranberry products.
2. Ulcerative Collitis
A small study published in 2005 suggests that regularly drinking cranberry juice may prevent Helicobacter pylori infection, a major cause of peptic ulcers (a sore on the lining of the stomach or duodenum, the beginning of the small intestine). Infection with H. pylori (a type of of bacteria) is also linked to the development of gastric cancer.
3. Periodontitis
According to a 2004 study, cranberries may help gum disease by preventing bacteria from sticking to teeth. To help reduce your risk of gum disease (a condition that may be linked to heart disease), drink about four ounces a day of cranberry juice that does not contain added sugar.
Cranberries’ Common Uses
The most common medicinal use of cranberries is to treat urinary tract infections. Cranberry is also used to manage or prevent the following:
- Gum disease
- Diarrhea
- Diabetes
- Stomach problems
- Atherosclerosis, or hardening of the arteries,
Cranberry Side Effects and Precautions:
Eating whole cranberries appears to be safe, but drinking excessive amounts of juice could cause an upset stomach.
Since cranberries may increase the blood-thinning effects of warfarin, it’s important to avoid cranberry products if you’re using this medication.