Why juice cleanses for weight loss may backfire on your health

Juice cleanses have grown in popularity as a quick fix for weight loss. But experts warn that relying on liquid-only diets can do more harm than good. Instead of shedding fat, people often lose water and muscle while risking their health in the process. A juice cleanse usually means drinking only fresh-pressed fruit and vegetable liquids for days or weeks. While this may lead to rapid weight loss, most of it comes from water, not fat. The body starts breaking down muscle for energy when it lacks proper nutrients.

Without protein, fibre, or healthy carbs, metabolism slows down, leaving people tired and struggling with brain fog. Blood sugar crashes can also happen, making exercise harder and leaving the stomach growling. Severe calorie restriction—like juice fasting—is widely seen as an unhealthy way to lose weight. Germany's updated S3 guideline on oncological nutrition medicine even warns against restrictive diets, citing risks like malnutrition. Instead, sustainable weight loss comes from a balanced diet of whole foods, regular exercise, good sleep, and stress management. The best approach includes 150 minutes of physical activity each week, along with hydration and proper rest.

Juice cleanses may promise fast results, but they fail to support long-term fat loss. The body needs nutrients from whole foods to stay healthy and energised. For lasting weight management, a steady routine of exercise, balanced meals, and self-care remains the safest choice.