A woman has presented an increase in its level of sugar in the blood every time she ate a tomato, food yet considered to be low in sugar and fat, according to the study which involved 800 people in Israel and published Thursday in the Cell Press newspaper.

“The first great surprise and very interesting discovery that we had is the great variability of reactions of people to the same course, “summed Eran Segal, a researcher at the Weizmann Institute of Science in Israel.

Participants controlled their sugar for a week and provided stool samples to analyze their gut microbiome, while closely monitoring their food intake. No participant was diabetic, but some were obese and had health conditions close to those pre-diabetes. “There are profound differences between individuals –in some cases, they had some adverse reactions compared to autres– and we really lack information” scientific about it, said Mr. Segal.

Sample shipment

The co-author of the study, Eran Elinav, estimates have taught him to “our collective level of inaccuracy on one of the concepts the most basic of our existence, that what we eat and how we integrate nutrition in our daily lives. ”

Instead of following standard diets, we need a much more personalized approach, putting people at the center of the regime and not the opposite, which not only help them control their sugar levels but also improve their health, suggests Mr Elinav.

The two researchers claim to have made progress on a system capable of providing better nutritional analysis based on individuals. The method would need to send stool samples to analyze bacteria in the digestive system, researchers have identified specific microbes correlated to the sugar levels in the blood after meals.

“This study highlights the the importance of an individualized nutrition, nutrition counseling should vary from one person to another and be adjusted to meet the needs of each individual based on their responses to different foods, “noted Minisha Sood, Director Service diabetology Lenox Hill Hospital in New York.

“What remains to decipher is the exact way to adjust the personalized nutrition. Should be based, at least in part, microbiome or intestinal flora? “, she continues.

The secrets of microbiomes

Rebecca Blake, nutrition specialist medical network Mount Sinai Beth Israel, explains that the influence of intestinal flora on metabolism and obesity “is an evolving discipline in the field of nutritional science.” The microbiomes are ecosystems made up of microorganisms, such as bacteria.

Scientists fifty US institutions called last month to launch an ambitious project to unlock the secrets of these ecosystems extremely complex. Members of the “Unified Microbiome Consortium Initiative” (UMIC) had then pointed out that the 100,000 billion microbes inhabiting the human body far outweigh the number of our own cells and are essential to their development and to our health.

“It must be asked whether it is the egg or the hen: is that our diet affects the intestinal microbiome and obesity, or else is it that it is the microbiome in impact on our weight “asks for her part Ms. Blake. “We need further research to further elucidate the nature of these connections,” she concludes.