HomeENGLISH MAGAZINECranberries: a fruity tool to shape microbiota and our health

Cranberries: a fruity tool to shape microbiota and our health

In a recently published feeding trial in The Journal of Nutritional Biochemistry, scientists investigated the potential protective effect of cranberries on the gut microbiome with an animal-based diet. Consuming cranberry compounds modified the impact of an animal-based diet in study participants by restoring a healthier microbiota profile. The addition of whole cranberry powder lessened potentially carcinogenic secondary bile acids and blunted the decline in beneficial short chain fatty acids (SCFA) in the gastrointestinal (GI) tract. “Among the 20 most commonly consumed fruits in the American diet, we chose to investigate cranberries and the gut microbiome as they are among the fruits with a high total phenol content,” said study author, Dr. Oliver Chen, which further explained the importance of the investigation because the gut microbiota is a key protector for human health. “An imbalance can increase the risk for several chronic diseases, including atherosclerosis, hypertension, kidney disease and type 2 diabetes. “Identifying foods – like cranberries – that can help shape and support a healthier gut microbiome could have a remarkable impact on public health“.

An international team led by researchers from the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, conducted a randomized, double-blind, crossover study of 11 healthy subjects (7 males, 4 females) aged 25 to 54 years with normal digestive function. A control diet, comprised of meats, dairy products and simple sugars was compared to a treatment diet – the control diet plus 30 grams of freeze-dried whole cranberry powder – for two, 5-day periods with a 2-week washout in between. The animal-based diet included meats, dairy products, and simple sugars. Stool, urine, and blood samples were obtained before and after each intervention phase. As compared to the pre-control diet, control diet modified 46 taxonomic clades, including an increase in the abundance of Firmicutes and decrease in Bacteroidetes. Moreover, it increased bacteria-derived deoxycholic acid and decreased acetate and butyrate in stool. As compared to the post-intervention phase of control diet, the cranberry diet modified 9 taxonomic clades, including a decrease in the abundance of Firmicutes and increase in Bacteroidetes.

The cranberry diet showed fewer potentially negative microbiota changes than the control diet phase. No changes were found in fecal trimethylamine (a marker for aminoacid catabolism) and plasma cytokines (markers for inflammation). It appeared that adding cranberries to the control diet reduced the rise in secondary gut bile acids that have been associated with colon and GI cancer. Cranberries also lessened the drop in beneficial SCFA thought to help maintain healthy GI cells. Overall, the treatment diet suggested that cranberry constituents may help support a healthy gut microbiome. Terry Humfeld, executive director of the non-profit Cranberry Institute – an organization established for cranberry research and education – is satisfied of the results of the study, and positively commented: “On behalf of the Cranberry Institute and cranberry growers and handlers, it is exciting and rewarding to see new diverse health research about the potential benefits of cranberry consumption. Let scientists continue to dedicate their studies to exploring the inherent value of eating cranberries, so as an industry, we will proudly continue to support their efforts”.

  • Edited by Dr. Gianfrancesco Cormaci, PhD, specialist in Clinical Biochemistry.

Scientific references

Rodríguez-Morató J et al. Chen CO. J Nutr Biochem. 2018; 62:76-86.

Chew B et al., Chen CO, Blumberg J. Eur J Nutrition 2018 Feb 23. 

Singh DP et al. Chopra K, Bishnoi M. Eur J Nutrition 2017 Nov 10. 

Blumberg JB, Basu A et al. Advanced Nutr. 2016; 7(4):759S-70S.

Monk JM et al., Power KA. J Nutr Biochem. 2016 Feb; 28:129-39.

Dott. Gianfrancesco Cormaci
- Laurea in Medicina e Chirurgia nel 1998 (MD Degree in 1998) - Specialista in Biochimica Clinica nel 2002 (Clinical Biochemistry residency in 2002) - Dottorato in Neurobiologia nel 2006 (Neurobiology PhD in 2006) - Ha soggiornato negli Stati Uniti, Baltimora (MD) come ricercatore alle dipendenze del National Institute on Drug Abuse (NIDA/NIH) e poi alla Johns Hopkins University, dal 2004 al 2008. - Dal 2009 si occupa di Medicina personalizzata. - Guardia medica presso strutture private dal 2010 - Detentore di due brevetti sulla preparazione di prodotti gluten-free a partire da regolare farina di frumento immunologicamente neutralizzata (owner of patents concerning the production of bakery gluten-free products, starting from regular wheat flour). - Responsabile del reparto Ricerca e Sviluppo per la società CoFood s.r.l. (leader of the R&D for the partnership CoFood s.r.l.) - Autore di un libro riguardante la salute e l'alimentazione, con approfondimenti su come questa condizioni tutti i sistemi corporei. - Autore di articoli su informazione medica e salute sui siti web salutesicilia.com, medicomunicare.it e in lingua inglese sul sito www.medicomunicare.com
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