When carbohydrates are restricted for a couple of days, the body will start to produce ketones. This alternative fuel source comes with many benefits for the brain and nervous system, while it simultaneously promotes weight loss. Once the body enters ketosis and starts to burn ketones for fuel, most ketogenic dieters will experience increased energy levels and decreased appetite. This leads to the consumption of fewer calories, resulting in more weight loss. Another reason why ketosis and weight loss are linked is that ketones have a mild diuretic effect. This is important to know because many people will mistake their rapid weight loss on keto as if it is all coming from fat. In reality, the rapid weight loss that occurs in the first week of the ketogenic diet is mostly due to water loss.