The Mediterranean diet is already considered one of the healthiest for your heart, and now scientists say it may give your gut bacteria a boost, too.
One nutritionist wasn't surprised, and believes that the diet's reliance on vegetables could be key to the effect., nuts and seeds all have multifold benefits in enhancing our gut microbiome," said Sharon Zarabi, a registered dietitian who directs the bariatric program at Lenox Hill Hospital in New York City. She wasn't involved in the new research, which was led by Dr. Paul O'Toole, a microbiologist at University College Cork, in Ireland.
According to O'Toole's team, prior research has suggested that a poor diet can have a negative impact on an older person's strength and stamina, as well as their microbiome -- the trillions of bacteria living in the human digestive tract. In their study, the researchers tracked how a Mediterranean diet affected the microbiomes of more than 600 people, aged 65 to 79, who were living in France, Italy, the Netherlands, Poland and the United Kingdom.Their gut microbiomes were assessed before and after 12 months of either eating their usual diet or a Mediterranean diet that had been specially tailored to older people.
Eating the Mediterranean diet for a year was tied with a number of beneficial changes to the gut microbiome. For example, the diet seemed to help stem the loss of diversity in bacterial species in the gut -- a more diverse microbiome is thought to be healthier. The Mediterranean diet was also tied to a rise in bacterial species that have long been associated with keeping people physically and mentally stronger as they age. In addition, the diet was linked to a lower production in the gut of potentially harmful inflammatory chemicals, the team said.
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