Will I lose weight if I stop eating for 4 days?

Answered by James Kissner

If you stop eating for four days, yes, you will most likely lose weight. However, it’s important to understand that this weight loss will primarily be from water, glycogen stores, and fat reserves, rather than muscle.

When you stop eating, your body first taps into its glycogen stores, which are essentially stored carbohydrates in the liver and muscles. Glycogen stores can provide energy for the body for about 24-48 hours, depending on the individual and their activity level.

Once the glycogen stores are depleted, your body begins to break down fat stores for energy through a process called lipolysis. This is when you start to see significant weight loss. It’s important to note that the rate at which you lose fat will vary depending on factors such as your basal metabolic rate, activity level, and overall calorie deficit.

During this period of fasting, your body will also use ketones as an alternative fuel source. Ketones are produced when the body breaks down fat for energy in the absence of carbohydrates. This can lead to a state of ketosis, which some people find beneficial for weight loss.

However, it’s worth mentioning that prolonged fasting can have negative effects on your health. It can lead to nutrient deficiencies, muscle loss, a decrease in metabolism, and even organ damage in extreme cases. It’s crucial to consult a healthcare professional before attempting any prolonged fasting or extreme diets.

Additionally, once you resume eating after a prolonged fast, it’s possible to regain some of the weight lost. This is because your body will replenish glycogen stores and water weight, which can result in temporary weight gain.

While you may experience weight loss if you stop eating for four days, it’s important to consider the potential risks and consult a healthcare professional before attempting any extreme dietary changes. Remember, sustainable and healthy weight loss involves a balanced diet, regular exercise, and a safe calorie deficit.