Do Detox Cleanses Work? Why I Call Them a Fitness Scam and What to Do Instead

No. There is no good evidence that detox teas, juice cleanses or detox kits remove toxins or cause lasting fat loss. Your liver, kidneys and gut already do that job. Most cleanses drop water weight and leave you hungry. What actually helps is fiber, fermented foods, enough water and protein, less alcohol and better sleep.

What does a detox actually do?

A review of detox diets found no randomized controlled trials showing they remove toxins, and the weight loss in studies was short term and came back (Klein and Kiat, 2015). A lot of detox teas are laxatives with a nice label. You lose water and food in your gut, the scale drops, and it all returns when you eat normally.

Why do people feel better on a cleanse?

Usually because they stopped drinking alcohol, cut out fast food and sugar, and drank more water for a week. Those changes help. The juice did not. Keep the good habits and drop the expensive bottles.

How do I support my gut health without a detox?

Food first:

• Fiber from beans, oats, berries, vegetables and whole grains. It feeds the good bacteria in your gut (Holscher, 2017).
• Fermented foods like plain yogurt, kefir, sauerkraut and kimchi. In a 10 week study, more fermented food increased gut microbe diversity and lowered inflammation markers (Wastyk et al., 2021).
• Water through the day.
• Protein at each meal to keep you full and protect muscle.
• Less alcohol and fewer ultra-processed foods.

I go deeper in important foods for improved gut health and good gut bacteria vs bad gut bacteria.

Are probiotics or digestive enzymes worth taking?

Maybe, for some people. Probiotics have evidence for a few specific problems, like some types of diarrhea, but the effects depend on the strain and the person, and many products are not well tested (NCCIH). Digestive enzymes help people with specific conditions, like lactose intolerance with lactase. If you have ongoing gut symptoms, see a doctor before stacking supplements.

What about activated charcoal and castor oil?

An older version of this post listed activated charcoal, castor oil and a long supplement stack. I took that out. Activated charcoal is a hospital treatment for some poisonings, and it can bind medications and nutrients, so it is not something to take a few times a week. Castor oil taken by mouth is a strong laxative. Neither is a fat loss tool. Talk to your doctor before using either.

What should I do instead of a detox?

Run a one week reset that you can keep going:

1. No alcohol for seven days.
2. A protein source and a vegetable at every meal.
3. Water as your main drink. Cut soda and juice.
4. One fermented food a day.
5. A 20 to 30 minute walk every day.
6. Seven to nine hours of sleep.

After the week, keep whichever habits made the biggest difference. That is a detox that actually changes something.

For more on why quick fixes fail, read why fad diets fail and what to do instead and why waist trainers, quick-fix programs and detoxes fail. If you want a real plan, take the XPL quiz.