Yes, it has the effect of losing weight. Lemon is a highly acidic fruit. Due to its high acidity, lemon is generally used more as a seasoning and cooking auxiliary ingredient. Most of lemon's strong acids come from its rich citric acid. Citric acid is also called citrate, because in physiology, the three major nutrients that provide human body energy - carbohydrates, fats, and proteins are metabolized into water and carbon dioxide through a series of chemical reactions, and at the same time release energy for use by the human body. This process is called the "citric acid cycle" and it is a complex chemical reaction process. In this process, citric acid is an indispensable and important intermediate metabolite that connects the three major nutrients with the end products of metabolism, carbon dioxide and water, and plays a role in providing energy to the human body.

In the citric acid cycle, the ingested citric acid will provide a certain amount of energy to the human body to a certain extent, which will also reduce the intake of other food by the human body in disguise. When the total energy intake is less than the total energy output, people will naturally lose weight and achieve the goal of weight loss, so citric acid has an effect on weight loss.