El ayuno intermitente no es más eficaz que la dieta tradicional para perder peso

The review by the Cochrane organization found that the scientific evidence does not support the fashion created in social networks and after a year of monitoring, no significant differences are found.

Systematic evaluation of research

Intermittent fasting is no more effective for weight loss than traditional dieting

A review by the Cochrane organization found that scientific evidence does not support the trend created by social networks and after one year of monitoring, no significant differences were found.

Javier Fernández, nutritionist: "Delaying breakfast two hours later in the morning helps you lose fat"

Intermittent fasting has become the biggest diet phenomenon in recent years.Driven by social media algorithms, lifestyle influences, and promises of accelerated fat burning, millions of people have adopted restrictive eating windows...However, science has just poured cold water on these expectations.A new systematic review by the Cochrane Organization—the world's leading evidence-based medicine—finds that intermittent fasting offers no significant benefits for weight loss in overweight or obese adults compared with standard dietary advice or even no specific intervention.

The study, which analyzed data from 22 clinical trials with almost 2,000 participants, questioned the high metabolic rate surrounding this process.After considering practices such as the next fasting day or time-limits, experts found no significant difference in hospitals in long-term results."Intermittent fasting does not seem to work for overweight adults or adults who are trying to lose weight," said Luis Garegnani, the author of the review and member of the Cochrane Associated Center of the Hospital of the University of Italy in Buenos Aires.

The expert warns about the gap between clinical reality and public opinion: "Intermittent fasting may be a logical choice for some people, but the current evidence does not support the enthusiasm we see in the media."

Vision of the Spanish experts

From Spain, the scientific community accepts the research as confirmation of the need for rigor, albeit with reservations about its practical utility.Ana Belen Cruzeiras, member of the Spanish Society for the Study of Obesity (SEEDO) and head of Epigenomics at the Institute of Health, believes that this is "a serious review that meets scientific standards", although the Spanish Scientific Center (SMC) warns that "the quality of many studies is limited and the follow-up is short, so this is not the last word."If done right, this strategy can create nutritional ketosis with antioxidant and anti-inflammatory benefits that improve quality of life, Cruzeiras says.

"The article doesn't say that intermittent fasting doesn't help with weight loss, but there's no evidence that it's better than a classic diet."

FRANCISCO J TINAHONES

I-Spanish Society of Endocrinology and Nutrition

Francisco J. Tinahones, President of the SEEDO Foundation and the Spanish Society of Endocrinology and Nutrition (SEEN) also spoke to the SMC.For experts, the research does not invalidate the technique, but what is considered useful. "The article does not say that intermittent fasting is not useful for weight loss, what is said is that with the studies that they have included so far, there is no evidence that it is better in reducing weight than the classic hypocaloric restriction," Tinahones explained.Endocrinologists note that at least, it is an alternative with the same effectiveness as a regular diet, unless there are new trials that shed more light.

Personalization yes, fashion no

In a world where obesity has tripled since 1975, the need to find effective solutions is clear.However, review authors such as Eva Madrid of the Cochrane Ibero-America Evidence Synthesis Unit caution that "clinicians should follow a case-by-case approach when counseling overweight adults."

Crujeiras shares this need to avoid universal recommendations, which insists that "obesity is a chronic disease that must be addressed in a unilateral and multifaceted way. The treatment must be personalized, adapted to each person; some treatment strategies work for some people and others, it depends on their lifestyle, their personal taste, their physiological profile, or the physiological profile, their professional diet."

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