The Spice Lab · Experiment 37
Do detox teas and juice cleanses actually work?
Detox teas, juice cleanses and "flush out the toxins" promises are everywhere. Do they do anything your body is not already doing, for free, every single day?
organs that already detox you
Your liver and kidneys detoxify your body continuously and for free. No tea or juice cleanse has been shown to do it better.
The promise is seductive: a few days of tea or juice and your body is "reset", the toxins flushed, the slate wiped clean. It sells beautifully. It also misunderstands how the body works.
You already have a detox system
Your liver and kidneys, backed by the gut, skin and lungs, process and excrete waste and harmful substances around the clock. They do not need a "flush", and the sellers rarely even define which "toxins" they mean.
What cleanses actually do
The short-term "weight loss" is mostly water and an empty gut, regained within days. Juice cleanses throw away the fibre (juicing discards it) and can spike blood sugar. And some detox teas contain laxatives or diuretics, which can dehydrate you, upset electrolytes and, with regular use, create dependency.
The kernel of truth
Eating more fruit and vegetables, drinking enough water, and cutting back on alcohol and ultra-processed food genuinely support your body's own detox organs. But that is simply a good diet, not a special tea, and unlike a real fermented drink such as kanji, most "detox" products add nothing.
The verdict
No cleanse beats your liver and kidneys. Skip the detox tea, keep the vegetables and the water, and be wary of anything that promises to "flush out toxins", especially if it is really a laxative in disguise.
Detox: claims vs reality
what actually worksYour organs do the detoxing; a good diet supports them. The teas and cleanses add nothing that matters.
What this means in your kitchen
Support the detox system you already have, and skip the products that claim to replace it.
- 1
Feed your real detox organs
Plenty of fruit, vegetables, fibre and water, and less alcohol and junk.
- 2
Skip laxative "detox" teas
They dehydrate, they do not detox.
- 3
Eat the whole fruit and vegetable
Do not juice away the fibre that does the good.
- 4
Ignore "cleanse" weight loss
It is water and an empty gut, and it comes straight back.
- 5
Be sceptical of "flush out toxins"
If a product promises it, it is usually selling a laxative.
The myth
"Detox teas and juice cleanses flush out toxins and reset your body."
The fact
Your liver and kidneys detox you continuously, for free. Cleanses mostly cost you fibre and money; the real "detox" is just eating well and drinking water.
How strong is the evidence?
We rate each claim separately, because they are not equally proven.
The liver and kidneys continuously detoxify the body (Strong)
Basic, well-established physiology.
No cleanse has been shown to remove "toxins" better (Not supported)
No credible evidence for detox products.
Some detox teas contain laxatives or diuretics (Strong)
A documented and potentially harmful reality.
A good diet supports the body's own systems (Strong)
Fruit, vegetables and water genuinely help.
This is educational content, not medical advice.
In one minute
- Your liver and kidneys detox you around the clock, for free.
- Cleanses mostly cost you fibre and money, and can be laxatives in disguise.
- The real "detox" is a good diet and enough water, nothing to buy.
Sources
- Klein AV, Kiat H. Detox diets for toxin elimination and weight management: a critical review. J Hum Nutr Diet. 2015;28(6):675-686.
- Ernst E. Alternative detox. Br Med Bull. 2012;101:33-38.
- US NIH / NCCIH. "Detoxes" and "cleanses": what you need to know.