As the new year begins, the familiar wave of “detox” promises comes flooding in. From juice cleanses and detox teas to charcoal capsules and liver “resets”, the message is clear: you’ve overindulged over the holidays, your body is full of toxins, and you need a product to flush them out. But the truth, according to liver researcher Trish Lalor, is that your body already has a built-in detox system – your liver.
Lalor, a Professor in Experimental Hepatology at the University of Birmingham, explains that the liver, supported by the kidneys and gut, continuously neutralises and breaks down chemicals, safely removing waste through urine and faeces. “If you are generally healthy and not repeatedly overwhelming your system, you do not need a reset,” she says. “What the liver needs most is time and consistency, meaning fewer repeated insults and enough recovery time to repair itself between them.”
Alcohol, for example, is processed directly by the liver. While the liver can cope with moderate drinking, binge or heavy consumption can overwhelm it, leading to the production of toxic by-products and long-term damage. Spacing out drinks, Lalor advises, keeps blood alcohol levels lower and gives the liver a better chance to keep up with detoxification.
As for popular “liver cleanses”, Lalor says they often make people feel better by simply reducing calorie intake, cutting out processed foods, and increasing fluid and fibre consumption. But she cautions that risks increase with very low-calorie regimens, poorly regulated herbal ingredients, or prolonged use.
Some supplements like milk thistle and turmeric do contain compounds with potential liver benefits, but the evidence is mixed, and higher doses increase the risk of side effects. “Natural” does not automatically mean safe, Lalor warns. Similarly, activated charcoal and coffee enemas can do more harm than good.
Instead, Lalor suggests focusing on sustainable lifestyle changes to support your liver. This means keeping alcohol within recommended limits, avoiding binge patterns, eating a fibre-rich diet with plenty of fresh fruits and vegetables, staying hydrated, and allowing regular rest days from alcohol. “Consistency beats gimmicks,” she says. “Your liver is an extraordinary organ that detoxifies your body every day without needing a cleanse, a tea or a reset.”
