An American magazine recently published an article dealing with intermittent fasting. Particularly fashionable now, this practice is the subject of mixed opinions. The publication mentions various negative effects such as dizziness, difficulty concentrating and impaired sleep.

Questions about its effectiveness
In 2019, we were defining intermittent fasting, a kind of eating practice of alternating periods of fasting with periods of normal eating. The followers aim to return to a more natural rhythm for the body. According to the French naturopath Romain Vicente, the digestive system needs rest. He recalled, for example, that during prehistoric times, humans did not eat three meals a day as they do today.

Reducing calorie intake, limiting weight gain as well as the rate of fat mass, these are the virtues attributed to intermittent fasting. However, an article published by the New York magazine Newsweek on October 18, 2020 mentions five reasons not to try this practice. For the author, it is uncertain whether intermittent fasting will work for the long term.

Multiple side effects
You should know that opinions differ regarding intermittent fasting. Some studies believe that the latter helps reduce the chances of waking up in the middle of the night, others indicate the opposite. This practice would disrupt sleep and cause some individuals to experience non-restorative nights. Some research suggests a decrease in REM sleep time. However, it improves memory, mood and learning skills. Lack of sleep can impact health and work, so it would be a good idea to set several snacks a day – between 3 and 5 – rather than fasting. By preventing the urge to snack in the middle of the night, we improve the quality of sleep.

Intermittent fasting could also be a source of reduced vitality and alertness. Indeed, the body would not consume enough calories during this period. The practice can cause dizziness, concentration problems as well as fatigue concerns. In case of dizziness, it becomes essential to recharge your energy with a snack.

The promise of rapid weight loss is the main reason some people practice intermittent fasting. However, our metabolism is complex, so other side effects can be felt. These include, for example, a loss of musculature or a deterioration in physical appearance. Indeed, there are risks of appearing older, frail and in poor health. Going without food for a long time can also contribute to an increase in cortisol levels, and therefore stress. However, a high level of cortisol is often synonymous with fat storage, which explains the risk of a yo-yo effect.