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Cranberry Dosage

Daily Dose of Cranberry: 4-8oz of juice

Supplementing with Cranberries

Photo Credit: http://www.flickr.com/photos/halfchinese/

Cranberries are small, red berries that have a bitter, sour taste. They are grown in areas with a cool climate such as Canada, the United States, and Europe. These berries are full of essential nutrients and are packed with antioxidants. They have high concentrated amounts of vitamin C, dietary fiber, manganese, and vitamin K. Cranberries have a long history of use among Native American tribes as food, in rituals, and in medicine. In modern times, cranberries are primarily consumed as food and sometimes used for treating urinary conditions.

Drinking cranberry juice can prevent urinary tract infection (UTI) by preventing the E. coli bacteria from attaching itself to the bladder and urinary tract walls. This is due to an astringent called tannin that is present in cranberries, making it possible to be used as an antibiotic to help prevent herpes, kidney infections, oral diseases, and cancer. Moreover, cranberries contain a large amount of antioxidants, a substance that protects the body’s cells from damage caused by free radicals. The high concentration of vitamin C in cranberries can also prevent colds and the flu. It has been shown to lower cholesterol, reduce blood pressure, and reduce the chance of developing type 2 diabetes. With all the health benefits of cranberries, it has also been used in weight loss programs.

Cranberries are sold fresh, frozen, and dried. They can be eaten whole and you can also get them in products like juice, jelly, sauces, and tea. They are also sold in supplement capsules. There is no standard or ideal dose for cranberry. Drinking 10-16oz of cranberry juice has been used in a study to prevent UTI. Experts claim that drinking 4-8oz of cranberry juice is enough to get nutritional benefits. For patients with type 2 diabetes, 6 capsules or an equivalent of 240ml of cranberry cocktail is taken daily for 12 weeks. Cranberry capsules are usually taken in 300-400mg doses twice daily.



  • Vasileiou I1, Katsargyris A, Theocharis S, Giaginis C. Current clinical status on the preventive effects of cranberry consumption against urinary tract infections. Nutr Res. 2013 Aug;33(8):595-607. PMID: 23890348.
  • [No authors listed] Prevention of recurrent urinary tract infections in women. Drug Ther Bull. 2013 Jun;51(6):69-72. PMID: 23766394.
  • [No authors listed] Prevention of recurrent urinary tract infections in women. Drug Ther Bull. 2013 Jun;51(6):69-72. PMID: 23766394.

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