What Fasting Does to Your Body: Benefits, Risks and Safe Practices

Fasting is practised for religious, cultural and health reasons. During a fasting period, the body first uses stored glucose for energy. As insulin levels fall, it gradually relies more on stored fat. This can help some adults manage calorie intake and reduce unnecessary snacking. Some studies link intermittent fasting with improved insulin sensitivity, body weight, blood pressure and certain blood-fat markers. However, fasting is not a cure for diabetes or a substitute for a balanced diet. The benefits often depend on what you eat during your feeding window and whether fasting helps you maintain a healthier routine. Long or extreme fasts can cause dehydration, headaches, weakness, low blood pressure, nutrient deficiencies and electrolyte problems. Drink enough fluids, especially in hot weather, and break fasts with balanced meals that include vegetables, fruits, whole grains, protein and healthy fats. Fasting is not suitable for everyone. Children, teenagers, pregnant or breastfeeding women, people with eating-disorder histories, and anyone using diabetes or food-sensitive medication should speak with a healthcare professional before trying it.

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