One of America’s most loved fruits, cranberries have numerous health benefits. Small, round and red in color, they belong to the same family of berries as blueberries, bilberries and lingonberries.

Cranberries are a rich source of polyphenols, chemical compounds that have antibacterial, antiviral, anti-inflammatory, antimutagen (prevents gene mutation), antioxidant, cancer and tumor-fighting properties.[1] These disease-fighting properties can be useful in preventing several diseases. Here’s why you should include cranberries in your daily diet.

1. Manage Diabetes
Rich in vitamin C, cranberry juice can reduce diabetes side effects such as nerve damage and low immunity, and improve the quality of life for diabetics. A study found that more than one-half of the subjects had good control of blood glucose levels after having a glass of cranberry juice daily.[2]

Anthocyanins present in cranberries also improve pancreatic β-cell response to blood glucose, thus improving blood sugar levels.[3] Animal studies have also found that cranberry powder or cranberry-derived flavonoids improve insulin sensitivity and lower sugar levels in models of diabetes mellitus.[4,5]

2. Prevent Heart Disease
Plant antioxidants (anthocyanins, proanthocyanidins, and quercetin) present in cranberries reduce arterial stiffness, blood pressure and hypertension.[6,7,8,9] Studies have found that cranberries increase HDL (good) cholesterol levels, reduce LDL (bad) cholesterol, lower blood pressure and reduce risk of inflammation of blood vessels.[10,11,12,13]

3. Fight Urinary Tract Infection
The same plant compounds prevent E. coli bacteria from attaching to the bladder and urinary tract, the most common cause of urinary tract infections[14,15,16,17] Cranberries are the richest source of A-type proanthicyanidins and a number of studies suggest that this is the main reason for them to be so effective in reducing UTIs in both children and adults.[18,19,20,21,22,23]

4. Prevent Tooth Decay
Proanthocyanidine, a chemical compound in cranberries, stops harmful bacteria from clinging to the teeth. It also terminates acid production and protects the teeth from periodontal disease.[24,25]

5. Prevent Lung Inflammation
Nondialyzable material (NDM), a substance present in cranberries, prevents the influenza virus from attaching to the cells, thus reducing flu infections.[26,27]

6. Prevent Stomach Cancers & Ulcers
A-type proanthocyanidinsplant compounds in cranberries, prevent the Helicobacter pylori (a bacteria that causes stomach cancer, inflammation, and ulcers) from attaching to the stomach lining.[28,29,30,31,32,33]

A study suggests that drinking half a liter of cranberry juice daily can reduce H. pylori infections significantly.[34] Another study found that it suppressed the growth of H. pylori in 17 percent infected participants.[35]

For more interesting stories, visit our Health page and read about other Natural Remedies here.

Read More:
Relieve It With A Herb: Cranberries For Diabetes
Healthy Breakfast Recipes: Cranberry Sunflower Muesli
Cranberry Sauce: Antioxidant and Super Fruit!


1. Côté J, Caillet S, Doyon G, Sylvain JF, Lacroix M. Bioactive compounds in cranberries and their biological properties. Crit Rev Food Sci Nutr. 2010 Aug;50(7):666-79. doi: 10.1080/10408390903044107. Review. PubMed PMID: 20694928.

2. Chambers BK, Camire ME. Can cranberry supplementation benefit adults with type 2 diabetes? Diabetes Care. 2003 Sep;26(9):2695-6. PubMed PMID: 12941742.

3. Zhu Y, Xia M, Yang Y, Liu F, Li Z, Hao Y, Mi M, Jin T, Ling W. Purified anthocyanin supplementation improves endothelial function via NO-cGMP activation in hypercholesterolemic individuals. Clin Chem. 2011 Nov;57(11):1524-33. doi: 10.1373/clinchem.2011.167361. Epub 2011 Sep 16. PubMed PMID: 21926181.

4. Khanal RC, Rogers TJ, Wilkes SE, Howard LR, Prior RL. Effects of dietary consumption of cranberry powder on metabolic parameters in growing rats fed high fructose diets. Food Funct. 2010 Oct;1(1):116-23. doi: 10.1039/c0fo00089b. Epub 2010 Sep 22. PubMed PMID: 21776462.

5. Shabrova EV, Tarnopolsky O, Singh AP, Plutzky J, Vorsa N, Quadro L. Insights into the molecular mechanisms of the anti-atherogenic actions of flavonoids in normal and obese mice. PLoS One. 2011;6(10):e24634. doi: 10.1371/journal.pone.0024634. Epub 2011 Oct 10. PubMed PMID: 22016761; PubMed Central PMCID: PMC3189911.

6. Jennings A, Welch AA, Fairweather-Tait SJ, Kay C, Minihane AM, Chowienczyk P, Jiang B, Cecelja M, Spector T, Macgregor A, Cassidy A. Higher anthocyanin intake is associated with lower arterial stiffness and central blood pressure in women. Am J Clin Nutr. 2012 Oct;96(4):781-8. Epub 2012 Aug 22. PubMed PMID: 22914551.

7. Hooper L, Kroon PA, Rimm EB, Cohn JS, Harvey I, Le Cornu KA, Ryder JJ, Hall WL, Cassidy A. Flavonoids, flavonoid-rich foods, and cardiovascular risk: a meta-analysis of randomized controlled trials. Am J Clin Nutr. 2008 Jul;88(1):38-50. PubMed PMID: 18614722.

8. Cassidy A, O’Reilly ÉJ, Kay C, Sampson L, Franz M, Forman JP, Curhan G, Rimm EB. Habitual intake of flavonoid subclasses and incident hypertension in adults. Am J Clin Nutr. 2011 Feb;93(2):338-47. doi: 10.3945/ajcn.110.006783. Epub 2010 Nov 24. PubMed PMID: 21106916; PubMed Central PMCID: PMC3021426.

9. Zhu Y, Ling W, Guo H, Song F, Ye Q, Zou T, Li D, Zhang Y, Li G, Xiao Y, Liu F, Li Z, Shi Z, Yang Y. Anti-inflammatory effect of purified dietary anthocyanin in adults with hypercholesterolemia: a randomized controlled trial. Nutr Metab Cardiovasc Dis. 2013 Sep;23(9):843-9. doi: 10.1016/j.numecd.2012.06.005. Epub 2012 Aug 17. PubMed PMID: 22906565.

10. Ruel G, Pomerleau S, Couture P, Lemieux S, Lamarche B, Couillard C. Favourable impact of low-calorie cranberry juice consumption on plasma HDL-cholesterol concentrations in men. Br J Nutr. 2006 Aug;96(2):357-64. PubMed PMID: 16923231.

11. Lee IT, Chan YC, Lin CW, Lee WJ, Sheu WH. Effect of cranberry extracts on lipid profiles in subjects with Type 2 diabetes. Diabet Med. 2008 Dec;25(12):1473-7. doi: 10.1111/j.1464-5491.2008.02588.x. PubMed PMID: 19046248.

12. Ruel G, Pomerleau S, Couture P, Lemieux S, Lamarche B, Couillard C. Low-calorie cranberry juice supplementation reduces plasma oxidized LDL and cell adhesion molecule concentrations in men. Br J Nutr. 2008 Feb;99(2):352-9. Epub 2007 Aug 29. PubMed PMID: 17761017.

13. Simão TN, Lozovoy MA, Simão AN, Oliveira SR, Venturini D, Morimoto HK, Miglioranza LH, Dichi I. Reduced-energy cranberry juice increases folic acid and adiponectin and reduces homocysteine and oxidative stress in patients with the metabolic syndrome. Br J Nutr. 2013 Nov;110(10):1885-94. doi:10.1017/S0007114513001207. Epub 2013 Jun 11. PubMed PMID: 23750500.

14. Amy B Howell, Henry Botto, Christophe Combescure, Anne-Béatrice Blanc-Potard, Lluis Gausa, Tetsuro Matsumoto, Peter Tenke, Albert Sotto, Jean-Philippe Lavigne. Dosage effect on uropathogenic Escherichia coli anti-adhesion activity in urine following consumption of cranberry powder standardized for proanthocyanidin content: a multicentric randomized double blind study.BMC Infectious Diseases, 2010.10:94 DOI: 10.1186/1471-2334-10-94

15. Howell AB, Reed JD, Krueger CG, Winterbottom R, Cunningham DG, Leahy M. A-type cranberry proanthocyanidins and uropathogenic bacterial anti-adhesion activity. Phytochemistry. 2005 Sep;66(18):2281-91. PubMed PMID: 16055161.

16. Gupta K, Chou MY, Howell A, Wobbe C, Grady R, Stapleton AE. Cranberry products inhibit adherence of p-fimbriated Escherichia coli to primary cultured bladder and vaginal epithelial cells. J Urol. 2007 Jun;177(6):2357-60. PubMed PMID: 17509358; PubMed Central PMCID: PMC3684265.

17. Di Martino P, Agniel R, David K, Templer C, Gaillard JL, Denys P, Botto H. Reduction of Escherichia coli adherence to uroepithelial bladder cells after consumption of cranberry juice: a double-blind randomized placebo-controlled cross-over trial. World J Urol. 2006 Feb;24(1):21-7. Epub 2006 Jan 6. PubMed PMID: 16397814.

18. Gu L, Kelm MA, Hammerstone JF, Beecher G, Holden J, Haytowitz D, Gebhardt S, Prior RL. Concentrations of proanthocyanidins in common foods and estimations of normal consumption. J Nutr. 2004 Mar;134(3):613-7. PubMed PMID: 14988456.

19. Afshar K, Stothers L, Scott H, MacNeily AE. Cranberry juice for the prevention of pediatric urinary tract infection: a randomized controlled trial. J Urol. 2012 Oct;188(4 Suppl):1584-7. doi: 10.1016/j.juro.2012.02.031. Epub 2012 Aug 19. PubMed PMID: 22910239.

20. Salo J, Uhari M, Helminen M, Korppi M, Nieminen T, Pokka T, Kontiokari T. Cranberry juice for the prevention of recurrences of urinary tract infections in children: a randomized placebo-controlled trial. Clin Infect Dis. 2012 Feb 1;54(3):340-6. doi: 10.1093/cid/cir801. Epub 2011 Nov 18. PubMed PMID: 22100577.

21. Ferrara P, Romaniello L, Vitelli O, Gatto A, Serva M, Cataldi L. Cranberry juice for the prevention of recurrent urinary tract infections: a randomized controlled trial in children. Scand J Urol Nephrol. 2009;43(5):369-72. doi: 10.3109/00365590902936698. PubMed PMID: 19921981.

22. McMurdo ME, Argo I, Phillips G, Daly F, Davey P. Cranberry or trimethoprim for the prevention of recurrent urinary tract infections? A randomized controlled trial in older women. J Antimicrob Chemother. 2009 Feb;63(2):389-95. doi: 10.1093/jac/dkn489. Epub 2008 Nov 28. PubMed PMID: 19042940; PubMed Central PMCID: PMC2639265.

23. Stothers L. A randomized trial to evaluate effectiveness and cost effectiveness of naturopathic cranberry products as prophylaxis against urinary tract infection in women. Can J Urol. 2002 Jun;9(3):1558-62. PubMed PMID: 12121581.

24. Bonifait L, Grenier D. Cranberry polyphenols: potential benefits for dental caries and periodontal disease. J Can Dent Assoc. 2010;76:a130. Review. PubMed PMID: 20943032.

25. Bodet C, Grenier D, Chandad F, Ofek I, Steinberg D, Weiss EI. Potential oral health benefits of cranberry. Crit Rev Food Sci Nutr. 2008 Aug;48(7):672-80. doi: 10.1080/10408390701636211. Review. PubMed PMID: 18663617.

26. Weiss EI, Houri-Haddad Y, Greenbaum E, Hochman N, Ofek I, Zakay-Rones Z. Cranberry juice constituents affect influenza virus adhesion and infectivity. Antiviral Res. 2005 Apr;66(1):9-12. PubMed PMID: 15781126.

27. Oiknine-Djian E, Houri-Haddad Y, Weiss EI, Ofek I, Greenbaum E, Hartshorn K, Zakay-Rones Z. High molecular weight constituents of cranberry interfere with influenza virus neuraminidase activity in vitro. Planta Med. 2012 Jun;78(10):962-7. doi: 10.1055/s-0031-1298579. Epub 2012 May 15. PubMed PMID: 22588835.

28. You WC, Zhang L, Gail MH, Chang YS, Liu WD, Ma JL, Li JY, Jin ML, Hu YR, Yang CS, Blaser MJ, Correa P, Blot WJ, Fraumeni JF Jr, Xu GW. Gastric dysplasia and gastric cancer: Helicobacter pylori, serum vitamin C, and other risk factors. J Natl Cancer Inst. 2000 Oct 4;92(19):1607-12. PubMed PMID: 11018097.

29. Nardone G, Morgner A. Helicobacter pylori and gastric malignancies. Helicobacter. 2003;8 Suppl 1:44-52. Review. PubMed PMID: 14617217.

30. Huang JQ, Sridhar S, Chen Y, Hunt RH. Meta-analysis of the relationship between Helicobacter pylori seropositivity and gastric cancer. Gastroenterology. 1998 Jun;114(6):1169-79. PubMed PMID: 9609753.

31. Shmuely H, Yahav J, Samra Z, Chodick G, Koren R, Niv Y, Ofek I. Effect of cranberry juice on eradication of Helicobacter pylori in patients treated with antibiotics and a proton pump inhibitor. Mol Nutr Food Res. 2007 Jun;51(6):746-51. PubMed PMID: 17487928.

32. Burger O, Ofek I, Tabak M, Weiss EI, Sharon N, Neeman I. A high molecular mass constituent of cranberry juice inhibits helicobacter pylori adhesion to human gastric mucus. FEMS Immunol Med Microbiol. 2000 Dec;29(4):295-301. PubMed PMID: 11118911.

33. Matsushima M, Suzuki T, Masui A, Kasai K, Kouchi T, Takagi A, Shirai T, Mine T. Growth inhibitory action of cranberry on Helicobacter pylori. J Gastroenterol Hepatol. 2008 Dec;23 Suppl 2:S175-80. doi: 10.1111/j.1440-1746.2008.05409.x. PubMed PMID: 19120894.

34. Zhang L, Ma J, Pan K, Go VL, Chen J, You WC. Efficacy of cranberry juice on Helicobacter pylori infection: a double-blind, randomized placebo-controlled trial. Helicobacter. 2005 Apr;10(2):139-45. PubMed PMID: 15810945.

35. Gotteland M, Andrews M, Toledo M, Muñoz L, Caceres P, Anziani A, Wittig E, Speisky H, Salazar G. Modulation of Helicobacter pylori colonization with cranberry juice and Lactobacillus johnsonii La1 in children. Nutrition. 2008 May;24(5):421-6. doi: 10.1016/j.nut.2008.01.007. Epub 2008 Mar 17. PubMed PMID: 18343637.

Armed with a PhD in Alternative Medicine, a graduate degree in Biotechnology, an MSc, and an MBA in Clinical Research and Clinical Pharmacology, Dr Jonathan is a certified practitioner of Alternative Medicine and is actively involved in patient education initiatives. He is also the author of the bestselling book, Outsmart Diabetes. Dr Jonathan loves to share his passion for herbs and other alternative medicinal practices with others through his writing.