Juice cleanses detox the body
The body has sophisticated, continuously operating detoxification systems in the liver and kidneys. Juice cleanses provide no evidence-based benefit over these natural processes and can carry risks including electrolyte imbalance and blood sugar spikes.
What we know
The concept of 'detoxing' through juice cleanses rests on the premise that the body accumulates toxins from food and the environment and requires a special dietary intervention to remove them. This premise does not reflect the actual physiology of detoxification. The liver filters blood, processes drugs, metabolites, and waste products, and converts toxic compounds into forms that can be excreted by the kidneys. These processes operate continuously without dietary intervention.
The National Center for Complementary and Integrative Health reviewed the evidence for detox diets and cleanses in 2015 and 2017 and found no compelling research supporting their use for weight management or toxin elimination. A 2015 review concluded there was no credible evidence that juice cleanses provide detoxification benefits. A 2017 review found that any weight loss during a cleanse results from caloric restriction and water loss, not fat reduction, and is typically regained when normal eating resumes.
Juice cleanses also have documented risks. Removing dietary fiber by juicing fruits and vegetables produces high-sugar beverages that can spike blood glucose. This is particularly dangerous for diabetics. The absence of protein and fat from a juice-only regimen can cause electrolyte imbalances and hypoglycemia. Some detox juices made from high-oxalate plants like spinach and beets increase kidney stone risk in susceptible individuals. The University of Rochester Medicine and Nebraska Medicine both explicitly state that juice cleanses do more harm than good for most people.
Healthcare providers recommend supporting natural detoxification through a balanced diet, adequate hydration, limited alcohol, and maintaining a healthy weight, not through cleanses.
Common claims
- Juice cleanses remove accumulated toxins from the body.False. The liver and kidneys detoxify continuously; cleanses add no benefit.
- Weight loss from a juice cleanse means fat burning.False. It is water weight that returns when normal eating resumes.
- Juice cleanses are a good way to reset your digestive system.Not supported. They lack fiber, protein, and fat; juicing removes digestive benefits of whole produce.