Detox Teas and Cleanses: What They Do (and Don’t) for Weight

Key takeaways

• NCCIH reports no compelling research supporting detox diets for weight management; early losses come from very low calorie intake and are usually regained.^[1]
• Even extreme laxative purging (4 to 6 liters of diarrhea) cut calorie absorption by only about 12%.^[4]
• NIH advises not taking senna, a common detox-tea laxative, for more than one week without talking to a doctor.^[5]
• In 2020 Teami settled FTC charges over unsupported detox-tea weight-loss claims, with a $15.2 million judgment suspended after a $1 million payment.^[10]
• The FDA has found sibutramine, a drug withdrawn in 2010, in "slim" teas sold in the U.S.^[12]

In short: Detox teas and cleanses can make the scale drop for a few days, but mostly through water and stool, not fat. Many “slimming” teas contain laxatives such as senna, and studies show that even extreme laxative use cuts calorie absorption by only about 12%. Juice cleanses work only because they are very low in calories, and the weight tends to return once normal eating resumes. Regulators have also acted against detox tea marketing: the FTC settled with Teami in 2020 over unsupported weight-loss claims, and the FDA has found the banned drug sibutramine in some “slim” teas.

This page looks at what is actually in detox teas and cleanse kits, what each ingredient does to your body, and what the FDA and FTC have done about them. For pills and capsules sold for weight loss, see our weight-loss pills guide; for eating well without a cleanse, start at our nutrition hub. This is general education, not medical advice: talk with your clinician before using any laxative or cleanse, especially if you take medicines or have a health condition.

What “detox” products promise

The pitch is usually the same: modern life fills your body with “toxins”, the toxins make you bloated and heavy, and a tea, juice program or colon cleanse flushes them out so you feel lighter and lose weight. Products come as teatoxes (often a “morning” tea and an “evening” tea), juice cleanses of 3 to 10 days, powders, and colon cleansing kits or procedures. Social media made them famous, often through influencer posts.

The National Center for Complementary and Integrative Health (NCCIH), part of the NIH, summarizes the science plainly: a 2015 review found “no compelling research” supporting detox diets for weight management, and a 2017 review noted that any early weight loss comes from eating very few calories and is usually regained afterward. The 2015 review also found no randomized trials testing commercial detox diets in people, and NCCIH notes that the FDA and FTC have acted against several detox and cleansing products for hidden ingredients, false disease claims or unapproved colon-cleansing devices.

What’s actually in the cup: ingredient by ingredient

Labels vary, but most detox and slimming teas combine three kinds of ingredient. None of them removes body fat.

Ingredient type	Common examples	What it does	Effect on body fat	Watch out for
Stimulant laxatives	Senna (often listed as senna leaf or sennosides), cascara	Makes the bowel move faster; more frequent, looser stools	None: even extreme purging cut calorie absorption by about 12%	Cramps, diarrhea, dehydration; NIH advises no more than 1 week of senna without a doctor; dependence with long use
Diuretic herbs	Dandelion leaf, others	More frequent urination for a few hours	None: the loss is water, which returns when you drink	Dehydration, especially with heat, exercise or other diuretics
Caffeine sources	Green tea, yerba mate, guarana	Mild stimulant; slightly higher energy use	Very small: catechins plus caffeine added about 100 calories a day in lab studies	Jitters, poor sleep, fast heartbeat; FDA cites 400 mg a day as generally safe for most adults
Hidden drugs (in some products)	Sibutramine, phenolphthalein	Not listed on the label; found by FDA testing	Not a reason to use them: sibutramine was withdrawn in 2010	Raised blood pressure and heart rate; dangerous with heart disease

Laxatives empty your bowel, not your fat cells

Most of the weight lost on a teatox is the contents of your gut and the water that goes with it. A carefully measured 1983 study in the Annals of Internal Medicine tested this directly: in bulimic patients who used laxatives and in healthy young women, even extreme purging that produced 4 to 6 liters of diarrhea reduced calorie absorption by only about 12% of what they ate. The authors concluded that the idea of using laxatives for weight control “is unsound”.

• Calories still absorbed88%88%
• Calories lost to purging12%12%

Even with extreme laxative purging, most calories were still absorbed

Item	Value
Calories still absorbed	88%
Calories lost to purging	12%

88% is 100% minus the reported reduction of about 12% of calorie intake.

Source: Bo-Linn GW et al., Annals of Internal Medicine 1983 (calorie balance study during purges of 4 to 6 liters) (checked on October 7, 2026)

Senna is a real medicine for occasional constipation, sold over the counter. NIH’s MedlinePlus advises not taking it for more than one week without talking to your doctor, warns that frequent or continued use may make you dependent on laxatives so that your bowels “lose their normal activity”, and notes it can cause cramps, nausea and faintness. Rectal bleeding needs medical attention right away. A product you drink every evening for 14 or 28 days is a long course of a laxative, whatever the packaging calls it.

Why the scale drops anyway

Three things make a cleanse look as if it worked. First, the gut empties. Second, diuretic herbs and caffeine make you pass more urine for a few hours: in a small 2009 study, a dandelion leaf extract increased how often 17 volunteers urinated in the five hours after the first dose. Third, cleanses are usually very low in calories and carbohydrates, so the body uses its glycogen (stored carbohydrate). Glycogen is stored with three to four parts water, so using it up releases a lot of water weight in the first days of any very low-calorie plan, and eating normally again brings it straight back.

Juice cleanses and colon cleansing

Juice cleanses replace meals with juices for a few days. They do cut calories, but NCCIH points out several risks: unpasteurized juices can carry harmful bacteria, which is especially serious for children, older adults and people with weak immune systems; juices made from high-oxalate foods such as spinach and beets can be a problem for people prone to kidney stones; and the laxative products often sold alongside them can cause diarrhea, dehydration and poor absorption of nutrients. Very low-calorie cleanses also leave little room for protein, which you need to protect muscle.

Colon cleansing (colonic irrigation) has little evidence behind it, and NCCIH lists potentially serious side effects, especially for people with digestive disease, past colon surgery, severe hemorrhoids, kidney disease or heart disease. If you feel bloated or irregular, our guide to a flatter stomach covers common causes of bloating and when it is worth seeing a doctor.

What regulators have done

The FTC and Teami (2020). In March 2020, the Federal Trade Commission announced a settlement with Teami, LLC and its owners. The FTC alleged that they claimed, without reliable scientific evidence, that the Teami 30 Day Detox Pack would help people lose weight and that other teas could fight cancer, clear clogged arteries and treat colds and flu. The complaint also highlighted paid Instagram posts by well-known influencers whose disclosure was hidden unless followers clicked “more”. The order banned unsupported health claims, required clear disclosure of paid endorsements and imposed a $15.2 million judgment, suspended on payment of $1 million because of the defendants’ inability to pay. The FTC also sent warning letters to 10 influencers.

The FDA and tainted “slim” teas. The FDA tests products sold for weight loss and posts public notifications when it finds hidden drugs. Two examples from its tainted-products list: in 2014 the agency warned that Lingzhi Cleansed Slim Tea contained sibutramine, and in 2021 it warned that Vy & Tea contained sibutramine. Sibutramine is a prescription weight-loss drug that was removed from the U.S. market in October 2010 for safety reasons; the FDA warns it can substantially raise blood pressure and pulse and is especially risky for people with heart disease or a history of stroke. Other products have contained phenolphthalein, a laxative chemical that is not an approved drug ingredient in the United States and that studies suggest may raise cancer risk.

These are not rare accidents. A 2018 analysis of the FDA’s tainted-supplements database found 776 adulterated products between 2007 and 2016, and 317 of them were sold for weight loss. Among those weight-loss products, 84.9% contained sibutramine. The FDA itself says its list covers only a small fraction of the contaminated products on the market, so a product’s absence from the list is not proof that it is clean.

Sexual enhancement353

Weight loss317

Muscle building92

Adulterated supplements found by the FDA, 2007 to 2016, by what they were sold for

Item	Value
Sexual enhancement	353
Weight loss	317
Muscle building	92

776 products in all; sibutramine was in 84.9% of the weight-loss products.

Source: Tucker J et al., JAMA Network Open 2018 (analysis of the FDA tainted-products database) (checked on October 7, 2026)

How to spot a risky detox product

• Fast-loss promises. “Lose 10 pounds in 7 days” or “flatten your belly overnight” are classic warning signs in FTC and FDA consumer advice.
• Senna or another laxative in a daily, multi-week program. Check the label, including “evening” or “colon” teas.
• Disease claims. A tea that claims to fight cancer or clear arteries is making claims the FTC said Teami could not back up.
• Influencer posts with buried disclosures. Paid posts must say so clearly; the FTC’s case turned on posts that hid it.
• Imported “slimming” teas sold online with labels you can’t read. Several FDA notices involve products like these. Our guide on how to read a supplement label shows what else to check.

What to do instead

If you want the “fresh start” feeling a cleanse promises, you can get it in ways that also help long term. Drink water and unsweetened tea in place of sugary drinks (see our weight-loss drinks list). Fill up on vegetables, fruit, beans and whole grains, which add fiber that keeps you regular without a laxative; our best filling foods and the fibermaxxing explainer help. And aim for a modest, steady calorie deficit. If you want results quickly but safely, our page on losing weight fast explains what is realistic.

The verdict

Detox teas and cleanses do not remove fat. They move water and stool, and the quick drop on the scale comes back. Some contain laxatives meant for short-term use, a few have contained hidden prescription drugs, and the best-known detox tea brand settled FTC charges over its claims. Your money is better spent on food and habits that last. For more claims checked against the evidence, see our weight-loss myths roundup, our supplements hub, the history of diet fads and our look at weight-loss hoaxes in history.

Questions to ask a professional

• Is this tea or cleanse safe with my medicines, including diuretics or heart medicines?
• Could my bloating or constipation have a medical cause?
• Is it safe for me to use a laxative, and for how long?
• What eating changes would help my digestion and weight?

Frequently asked questions

Do detox teas help you lose weight?

Not fat. Most contain laxatives, diuretic herbs or caffeine, which cause water and stool loss that returns within days. NCCIH reports no compelling research supporting detox diets for weight management.

Is it safe to drink senna tea every day?

NIH advises not taking senna for more than one week without talking to your doctor, because continued use can make you dependent on laxatives. Ask a clinician about long-term constipation.

Do juice cleanses work for weight loss?

They cut calories for a few days, so the scale drops, but the weight usually returns once normal eating resumes. NCCIH also warns about unpasteurized juice and high-oxalate juices for people prone to kidney stones.

Has the government acted against detox teas?

Yes. The FTC settled with Teami in 2020 over unsupported weight-loss and disease claims and hidden influencer payments, and the FDA has warned about "slim" teas found to contain sibutramine.

Do detox diets remove toxins?

There is little evidence that it does: a 2015 review found no randomized trials showing that commercial detox diets work in people, and the few studies that exist are small and flawed. If you feel unwell or bloated for a long time, see a clinician.

References

1. “Detoxes” and “Cleanses”: What You Need To Know. National Center for Complementary and Integrative Health (NIH). (accessed October 7, 2026) Government page
2. Klein AV, Kiat H. Detox diets for toxin elimination and weight management: a critical review of the evidence. Journal of Human Nutrition and Dietetics, 2015. doi:10.1111/jhn.12286 · PMID 25522674 (accessed October 7, 2026) Review
3. Obert J, Pearlman M, Obert L, Chapin S. Popular Weight Loss Strategies: a Review of Four Weight Loss Techniques. Current Gastroenterology Reports, 2017. doi:10.1007/s11894-017-0603-8 · PMID 29124370 (accessed October 7, 2026) Review
4. Bo-Linn GW, Santa Ana CA, Morawski SG, Fordtran JS. Purging and calorie absorption in bulimic patients and normal women. Annals of Internal Medicine, 1983. doi:10.7326/0003-4819-99-1-14 · PMID 6190422 (accessed October 7, 2026) Other
5. Senna. MedlinePlus, U.S. National Library of Medicine. (accessed October 7, 2026) Government page
6. Clare BA, Conroy RS, Spelman K. The diuretic effect in human subjects of an extract of Taraxacum officinale folium over a single day. Journal of Alternative and Complementary Medicine, 2009. doi:10.1089/acm.2008.0152 · PMID 19678785 (accessed October 7, 2026) Other
7. Kreitzman SN, Coxon AY, Szaz KF. Glycogen storage: illusions of easy weight loss, excessive weight regain, and distortions in estimates of body composition. American Journal of Clinical Nutrition, 1992. doi:10.1093/ajcn/56.1.292S · PMID 1615908 (accessed October 7, 2026) Other
8. Hursel R, Viechtbauer W, Dulloo AG, et al.. The effects of catechin rich teas and caffeine on energy expenditure and fat oxidation: a meta-analysis. Obesity Reviews, 2011. doi:10.1111/j.1467-789X.2011.00862.x · PMID 21366839 (accessed October 7, 2026) Meta-analysis
9. Spilling the beans: how much caffeine is too much?. U.S. Food and Drug Administration. (accessed October 7, 2026) Government page
10. Tea Marketer Misled Consumers, Didn’t Adequately Disclose Payments to Well-Known Influencers, FTC Alleges (Teami). Federal Trade Commission, 2020. (accessed October 7, 2026) Government page
11. Public Notification: Lingzhi Cleansed Slim Tea Contains Hidden Drug Ingredient. U.S. Food and Drug Administration, 2014. (accessed October 7, 2026) Government page
12. Public Notification: Vy & Tea contains hidden drug ingredient. U.S. Food and Drug Administration, 2021. (accessed October 7, 2026) Government page
13. Public Notification: Body Shape Weight Loss System contains hidden drug ingredients (sibutramine and phenolphthalein). U.S. Food and Drug Administration. (accessed October 7, 2026) Government page
14. Weight loss product notifications (tainted products). U.S. Food and Drug Administration. (accessed October 7, 2026) Government page
15. Tucker J, Fischer T, Upjohn L, et al.. Unapproved Pharmaceutical Ingredients Included in Dietary Supplements Associated With US Food and Drug Administration Warnings. JAMA Network Open, 2018. doi:10.1001/jamanetworkopen.2018.3337 · PMID 30646238 (accessed October 7, 2026) Other
16. The Truth Behind Weight Loss Ads. Federal Trade Commission. (accessed October 7, 2026) Government page

Facts checked on October 7, 2026

Educational information, not medical advice. Talk with a qualified healthcare professional about your own situation. In an emergency call 911.