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Sonali Bendre’s 18–20-hour intermittent fasting: Should you try it?

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Dr Saptarshi Bhattacharya

July 15, 2026
Sonali Bendre’s 18–20-hour intermittent fasting: Should you try it?

Actor Sonali Bendre has revealed her strict 18–20 hour intermittent fasting routine, prompting a discussion on the biological effects and safety of such restrictive eating windows for the general population.

Analyzing the Impact of Sonali Bendre's 18–20 Hour Intermittent Fasting Routine

Actor Sonali Bendre has recently sparked a significant conversation regarding wellness and nutrition by revealing her adherence to an 18–20 hour intermittent fasting (IF) schedule. By limiting her food intake to a very narrow window—essentially eating roughly one-and-a-half meals a day—Bendre has highlighted a trend toward more aggressive time-restricted feeding. This revelation is particularly impactful given her public image and the trust followers place in her lifestyle choices, leading many to question whether such a rigorous regime is a viable health strategy for the average person.

The Mechanics of Extended Intermittent Fasting

Intermittent fasting is not a diet in the traditional sense but rather an eating pattern. While the popular 16:8 method (16 hours of fasting and 8 hours of eating) is widely adopted, Bendre's 18–20 hour window pushes the body closer to a state known as 'One Meal a Day' (OMAD). From a physiological perspective, extending the fast to 20 hours forces the body to deplete its glycogen stores more thoroughly, prompting a deeper shift into ketosis, where the body burns stored fat for energy instead of glucose. This metabolic switch is often the primary goal for those seeking weight management or improved metabolic flexibility.

Biological Implications: Autophagy and Insulin Sensitivity

One of the most profound reasons individuals gravitate toward the 18–20 hour window is the potential induction of autophagy. Autophagy is the body's cellular 'housekeeping' process, where cells break down and recycle damaged components. While the exact timing of autophagy varies by individual, extended fasts are generally believed to trigger this process more effectively than shorter windows. Furthermore, such a routine can significantly lower insulin levels and improve insulin sensitivity, which is critical in combating the prevalence of Type 2 diabetes and metabolic syndrome in modern urban populations.

The Risks of Celebrity-Driven Wellness Trends

The critical question raised by Bendre's routine—"Should you try it?"—highlights the danger of the 'halo effect' in celebrity wellness. What works for a high-profile individual with access to personalized nutritionists and medical monitoring may not be safe for the general public. A 20-hour fast significantly increases the risk of nutritional deficiencies if the remaining 'one-and-a-half meals' are not meticulously balanced. For individuals with a history of disordered eating, those who are underweight, or people with specific medical conditions like hypoglycemia, such a restrictive window could lead to severe health complications, including fainting, muscle loss, and hormonal imbalances.

The Broader Context of Modern Dietary Shifts

Bendre's approach reflects a broader global shift away from the traditional three-meals-a-day structure, which was largely a byproduct of the Industrial Revolution. There is a growing movement toward aligning eating patterns with circadian rhythms and ancestral biological cues. However, the transition to an 18–20 hour fast is a steep curve. For most, the psychological stress of extreme hunger can lead to binge eating during the feeding window, potentially neutralizing the benefits of the fast. This underscores the necessity of a gradual transition rather than an abrupt adoption of a celebrity's specific routine.

Conclusion: A Balanced Perspective on Time-Restricted Feeding

In summary, while Sonali Bendre's 18–20 hour intermittent fasting routine demonstrates a disciplined approach to health and may offer benefits like improved metabolic efficiency and cellular repair, it is not a one-size-fits-all solution. The efficacy of such a strict window depends entirely on the quality of the food consumed and the individual's unique biological makeup. Potential adopters should view this as an example of a possible health path rather than a prescription, prioritizing consultation with healthcare professionals to ensure that their nutritional needs are met without compromising their long-term health.

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