Fasting has been shown to lower blood sugar levels, improve insulin sensitivity, and reduce inflammation, all of which are important factors in preventing chronic diseases such as type 2 diabetes, heart disease, and obesity. Fasting has also been shown to boost the production of ketones, which are molecules that the body uses for energy in the absence of glucose. Ketones have been linked to various health benefits, including improved cognitive function and reduced inflammation. Weight loss: Fasting is also known to be an effective tool for weight loss. By restricting the number of hours in which one can eat, fasting can help reduce overall calorie intake and promote fat burning.