The ketogenic diet and intermittent fasting have been, without a doubt, the most popular diets for two years. If I really do not recommend the ketogenic diet because of the significant restrictions that the approach imposes, the lack of variety, the unfavorable impact on the microbiota and LDL-Cholesterol, intermittent fasting seems more advantageous to me.

The literature surrounding intermittent fasting looks promising. However, for the moment, the majority of the results obtained are mainly based on studies in rodents or on very specific populations, such as among Muslims during Ramadan. These contexts therefore do not allow the results to be extrapolated to the general population. In the context of long-term weight loss (12 months and more), we do not see a greater effect than that which could be obtained with more standard calorie restriction. However, for some people, it is easier to reduce the amount of calories ingested if they are concentrated in a more limited time window, as is the case with the popular 16-8, for example. A person on a 16-8 type fast will eat for 8 hours and fast for 16 hours. In this case, many choose to eat from 12 p.m. to 8 p.m., for example. In people who are not hungry in the morning or in those who tend to snack in the evening, the results could be interesting. The daily caloric balance is negative, which causes weight loss.

Note that fasting is not recommended for people with eating disorders, pregnant women or diabetics who are taking medication that can induce hypoglycemia.

If you want to incorporate this approach into your lifestyle, make sure it doesn't harm your relationship with food. If you experience a feeling of deprivation while fasting and this causes you to eat beyond your satiety signals afterwards, this strategy is not for you. I also recommend that those who wish to integrate this approach do so with the support of a nutritionist. It remains important to optimize intake during the food intake period to ensure that nutritional needs are met. Those who limit food intake to one meal cannot meet their nutritional needs.

Finally, although the 16-8 is more popular, it is also possible to fast for a period of 24 hours and more, and to combine these fasting days with normal eating days. I don't agree with this version. Indeed, the latter seems much more difficult to me and risks affecting the social life of the person who is fasting.e.

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  • Isabelle Huot Docteure en nutrition

    @Josée : Il n’y a pas de problème! Il est toutefois important de respecter la fenêtre de jeûne!

  • Isabelle Huot Docteure en nutrition

    @Josée : Il n’y a pas de problème! Il est toutefois important de respecter la fenêtre de jeûne!

  • Josée

    Bonjour j’ai une question souvent moi je mande a 17 heures donc souvent a partir de 18 heures mon jeune commence 16/8 donc 10 hr le lendemain je mange genre banane et un bagel beurre arachide,le dîner salade ou autre et je soupe mais ds ma fenêtre de 8 hr je
    mange trois repas et non deux Contrairement a ce que je lis je ne mange pas que deux repas

  • Ginette Adam

    Bonjour Dr. Isabelle. Auriez vous un livre à me suggérer sur le jeune 16/8.
    Merci .

  • Isabelle Huot Docteure en nutrition

    @Murielle : Bonjour Murielle, appelez-nous pour prendre rendez-vous avec une nutritionniste : 1 877 761-5456!

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