A new piece is added to the knowledge on the nutritional program of intermittent fasting. And it’s a sobering observation. Why does he ask a clear question? In the long run, is this nutritional strategy always positive? American research conducted on a population of more than 20,000 adults says no. And it seems to go against the grain of what has emerged in recent times. The study shows, as reported in a note from the American Heart Association, that those who concentrate their diet in just eight hours have a potential 91% greater risk of deaths from cardiovascular diseases, such asfart and ofshot.
Obviously in comparison to those who tend to “extend” the rhythms of meals, with the canonical 12-16 hours a day of food intake. All of this, it must be said, without any particular positive effects linked to intermittent fasting, not even on subjects at risk, such as those who have already had heart and artery diseases or those suffering from cancer. Throwing this stone into the pond of knowledge, going against the current of some recent evidence, is still preliminary research presented as an abstract at the conference “‘Epidemiology and Prevention?Lifestyle and Cardiometabolic Scientific Sessions 2024” of the American Heart Association, underway in Chicago. Attention: it should be emphasized that the study is alone observational and therefore does not allow us to draw conclusions on the mechanisms that could potentially come into play to explain what happens.
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Surprise results
The study involved approximately 20,000 adults in the United States, with an average age of 49 years, followed for an average of 8 years (with peaks up to 17 years). The data was compared with that of deceased people in the USA. It emerged that those who concentrate their entire food intake in less than 8 hours each day have a 91% higher risk of death from cardiovascular pathologies compared to the control population, with an increase in risk that is observed, albeit with a very different, even in those who suffer from tumor diseases or indeed cardiovascular. Not only. Even those who concentrated the food in just 10 hours or less still showed an approximately two-thirds higher risk for stroke or heart disease. Finally, limiting food consumption over time did not reduce the overall risk of death from any cause. In short: despite all the necessary precautions, the study must be taken with a pinch of salt because it is preliminary and based on self-completed questionnaires by the subjects involved, and requires reflection.
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“Limiting daily meal time to a short period, such as 8 hours a day, has gained popularity in recent years as a way to lose weight and improve heart health,” the American Heart Association said in a statement. senior author of the study Victor Wenze Zhong, Ph.D., from Shanghai Jiao Tong University, China. However, the long-term health effects of time-restricted eating, including the risk of death from any cause or cardiovascular disease, are unknown.”
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What is intermittent fasting based on?
Intermittent fasting is a time-restricted eating model. In practice, it is proposed to limit the hours in which food is introduced to a narrow window each day, which can vary from 4 to 12 hours daily. Among the most popular choices is the 16:8 eating plan: you eat within 8 hours and fast for the remaining 16 hours each day. Several studies have shown the benefits of this strategy in terms of health and optimization of the metabolism, with positive repercussions on blood pressure and glycemia and on the values of cholesterol in the blood.
Intermittent fasting: Does not help weight loss
In addition obviously to more efficient weight control. Now this analysis, which verified the effects of the model over longer periods of time, proposes a reflection and relaunches the importance of further investigations on the topic “Although this type of diet has become popular thanks to its potential short-term benefits, our Research clearly shows that, compared to a typical eating time of 12-16 hours per day, a shorter meal duration is not associated with a longer life – comments Zhong. It is critical that patients, particularly those with existing heart disease or cancer, are aware of the association between an 8-hour eating window and an increased risk of cardiovascular death.”
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