Gut Microbes Alter Glucose Response, Highly Individual
Which is more likely to raise blood sugar levels: sushi or ice cream? According to a Weizmann Institute of Science study reported in the November 2015 issue of the journal Cell, the answer varies from one person to another. The study, which continuously monitored blood sugar levels in 800 people for a week, revealed that the bodily response to all foods was highly individual, and that gut microbes alter glucose response to food.
The study, called the Personalized Nutrition Project, was conducted by the groups of Prof. Eran Segal of the Department of Computer Science and Applied Mathematics and Dr. Eran Elinav of the Department of Immunology. Prof. Segal said: “We chose to focus on blood sugar because elevated levels are a major risk factor for diabetes, obesity, and metabolic syndrome.”
“The huge differences that we found in the rise of blood sugar levels among different people who consumed identical meals highlights why personalized eating choices are more likely to help people stay healthy than universal dietary advice.”
Indeed, the scientists found that different people responded very differently to both simple and complex meals. For example, a large number of the participants’ blood sugar levels rose sharply after they consumed a standardized glucose meal, but in many others, blood glucose levels rose sharply after they ate white bread, but not after glucose. “Our aim in this study was to find factors that underlie personalized blood glucose responses to food,” said Dr. Elinav. “We used that information to develop personal dietary recommendations that can help prevent and treat obesity and diabetes, which are among the most severe epidemics in human history.”
David Zeevi and Tal Korem, PhD students in Prof. Segal’s lab, led the study. They collaborated with Dr. Niv Zmora, a physician conducting PhD studies in Dr. Elinav’s lab, and with PhD student Daphna Rothschild and research associate Dr. Adina Weinberger from Prof. Segal’s lab. The study was unique in its scale and in the inclusion of the analysis of gut microbes, collectively known as the microbiome, which had recently been shown to play an important role in human health and disease. Study participants were outfitted with small monitors that continuously measured their blood sugar levels and were asked to record everything they ate, as well as such lifestyle factors as sleep and physical activity. Overall, the researchers assessed the responses of different people to more than 46,000 meals.
Taking these multiple factors into account, the scientists generated an algorithm for predicting individualized response to food based on the person’s lifestyle, medical background, and the composition and function of his or her microbiome.
In a follow-up study of another 100 volunteers, the algorithm successfully predicted the rise in blood sugar in response to different foods, demonstrating that it could be applied to new participants.
The scientists were able to show that lifestyle also mattered: The same food affected blood sugar levels differently in the same person, depending, for example, on whether its consumption had been preceded by exercise or sleep.
In the final stage of the study, the scientists designed a dietary intervention based on their algorithm; this was a test of their ability to prescribe personal dietary recommendations for lowering blood-glucose-level responses to food. Volunteers were assigned a personalized “good” diet for one week, and a “bad” diet — also personalized — for another. Both good and bad diets were designed to have the same number of calories, but the diets differed between participants. Thus, certain foods in one person’s “good” diet were part of another’s “bad” diet. The “good” diets indeed helped to keep blood sugar at steadily healthy levels, whereas the “bad” diets often induced spikes in glucose levels — all within just one week of intervention. Moreover, as a result of the “good” diets, the volunteers experienced consistent changes in the composition of their gut microbes, suggesting that the microbiome may be influenced by the personalized diets while also playing a role in participants’ blood sugar responses.
A video animation describing the study: www.youtube.com/watch?v=Ryc5M3Ciytg&feature=youtu.be
The scientists are currently enrolling Israeli volunteers for a longer-term follow-up dietary intervention study that will focus on people with consistently high blood sugar levels — and thus are at risk of developing diabetes — with the aim of preventing or delaying this disease.
Health-e-Solutions comment: The researchers observed, “PPGR was significantly correlated with several known risk factors including BMI, glycated hemoglobin (HbA1c%, wakeup glucose, and age. These associations persisted along the entire range of PPGR values, suggesting that the reduction in levels of risk factors could also reduce PPGR and vice versa.” So established risk factors still have an impact on how each individual responds to glucose.
The researchers also stated, “Dietary interventions based on our predictor showed significant improvements in multiple aspects of glucose metabolism, including lower PPGRs and lower fluctuations in blood glucose levels within a short 1-week intervention period. It will be interesting to evaluate the utility of such personalized intervention over prolonged periods of several months and even years. If successful, prolonged individualized dietary control of the PPGR may be useful in controlling, ameliorating, or preventing a set of disorders associated with chronically impaired glucose control.”
We could not agree more! This is what we do, and we think the dietary changes we make help transform our individual microbiomes to help rather than hinder our blood glucse response. While glucose response is individual, there is still a template of #VeryLowGlycemic, low #InsulinDemand, anti-inflammatory, alkalizing, non-GMO foods that seem to benefit most people quite dramatically.
We’d like to see you have success. Contact us today to schedule a consult. Or purchase our video workshop course and get on the road today toward better health, and to #ControlBloodSugarNaturally. People who have followed our natural, healthy lifestyle solutions have:
- Decreased their HbA1c percentage
- Reduced or eliminated insulin requirements,
- Reversed symptoms and complications
- Improved insulin sensitivity
- Improved fasting and post-prandial blood glucose levels
- Increased c-peptide secretion and insulin production
- Decreased or eliminated insulin antibodies
- Normalized their weight
(* results may vary)
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Journal Reference: David Zeevi, Tal Korem, Niv Zmora, David Israeli, Daphna Rothschild, Adina Weinberger, Orly Ben-Yacov, Dar Lador, Tali Avnit-Sagi, Maya Lotan-Pompan, Jotham Suez, Jemal Ali Mahdi, Elad Matot, Gal Malka, Noa Kosower, Michal Rein, Gili Zilberman-Schapira, Lenka Dohnalová, Meirav Pevsner-Fischer, Rony Bikovsky, Zamir Halpern, Eran Elinav, Eran Segal. Personalized Nutrition by Prediction of Glycemic Responses. Cell, 2015; 163 (5): 1079 DOI: 10.1016/j.cell.2015.11.001