Why don’t I feel hungry after a 20-hour fast?

This is likely due to some hormonal and metabolic changes in your body. It has been theorized that in experienced fasters, after many hours of going without food, their hunger and satiety hormones (ghrelin and leptin) have adapted to the routine, which means they’re less likely to feel hungry even after 20 hours of not eating. Some also say that the transition to using ketones instead of glucose in the fasting stage can lead to appetite suppression, which can mean less hunger, even after 20 hours of fasting.

Can I drink coffee while fasting?

Yes, you can, as long as the coffee in question is unsweetened and without any added cream or milk.

How long should I fast to cleanse my body?

You don’t need to fast to cleanse your body. The body already has organs, primarily the liver and kidneys, that cleanse your body daily, with or without fasting. However, if you’re talking about autophagy, which is the cell’s process of clearing out damaged components and recycling them into new ones, then fasting for between 24 and 48 hours may theoretically help with this, but research is still limited.

What are snacks for fasting?

There are no snacks for fasting, as you’re not allowed to consume calories during the fasting window. Only plain water, unsweetened coffee, and other calorie-free beverages are allowed.