Heavy Metal Detox Supplements: Do Binders, Glutathione and Shilajit Work?

What do "detox" supplements claim?

"Binders" are substances said to grab heavy metals, mould toxins or chemicals in the gut so you poo them out. Popular choices are zeolite (a volcanic mineral, usually clinoptilolite), chlorella (a green algae), activated charcoal and bentonite clay. They are often sold with "drainage" or "liver support" products such as glutathione (an antioxidant the body makes), and shilajit (a tar-like resin from mountain rock, used in Ayurvedic medicine).

Claims usually include:

• removing lead, mercury, aluminium and other metals
• clearing mould toxins or "parasites"
• reducing fatigue, brain fog, bloating and skin problems
• "supporting" the liver and kidneys

What does the evidence show?

Your body already has a detox system

Your liver changes many unwanted substances into forms that can be removed, and your kidneys filter blood and pass waste into urine. The UK Advertising Standards Authority says it has not seen evidence that toxins can be removed from the body by other means, and that general "detox" claims on food or supplements count as health claims that must be authorised. It has ruled against detox foot patches, for example in a 2024 notice.

Zeolite and bentonite clay

Zeolite does bind metals in water filters and in animal feed. A 2018 critical review concluded it appears tolerable in the studies available but that human evidence for medical uses is thin. There are no good trials showing zeolite lowers blood lead or mercury in ordinary people. Clays and zeolites can also contain naturally occurring metals themselves, so product testing matters.

Activated charcoal

Doctors sometimes give a single dose of activated charcoal in hospital soon after certain poisonings, because it binds some drugs in the gut. Even there, a Clinical Toxicology position paper and a 2021 systematic review say it should not be used routinely and evidence of benefit is limited. Taken at home, it can also bind your medicines, including the contraceptive pill, and stop them working.

Chlorella

A 2018 meta-analysis of randomised trials found chlorella may modestly improve some heart risk markers such as cholesterol and blood pressure. That is not the same as removing heavy metals, and trials were small. Chlorella contains vitamin K and iodine, which matter for people on warfarin or with thyroid conditions.

Glutathione

Glutathione is broken down in digestion, so whether a pill raises body levels is debated. A 4-week trial in 2011 found no change in glutathione or oxidative stress markers. A 6-month trial in 2015 found blood levels rose 17% to 35% and fell back after stopping. Neither showed a health benefit or metal removal. Glutathione injections and drips sold for "detox" or skin lightening are a separate issue and are not recommended without medical supervision.

Shilajit: a contamination question

Shilajit is formed in rock and naturally contains minerals. Laboratory analyses have found heavy metals in some samples, including a 2022 study that detected mercury in Indian shilajit, and a 2024 review that discussed metal toxicity as a key concern. US testing organisation ConsumerLab found metal levels generally low in the products it tested, but some would exceed strict lead limits if taken more than once a day, and it reported other researchers finding concerning lead and arsenic in a popular product. It is an irony worth noting: some "detox" products may add metals rather than remove them.

Who might reasonably try them?

Honestly, there is little reason to buy binders for heavy metals. People who like chlorella as a food supplement for its nutrients can take it as such, without detox expectations. If you are worried about exposure, the useful steps are reducing it at source: check for old lead pipes or paint in older homes, choose lower-mercury fish, and follow advice on safe renovation.

If you live in an older home, a water test for lead (some water companies offer this) and replacing lead pipes is far more useful than any supplement. For fish, the NHS advises pregnant women and children to limit higher-mercury fish such as swordfish, marlin and shark.

Who should be careful?

• Anyone on regular medicines: binders can stop medicines being absorbed. Separate by several hours and ask a pharmacist, or avoid them.
• People on warfarin (chlorella contains vitamin K) or with thyroid disease (chlorella and some algae contain iodine).
• Pregnant or breastfeeding women and children: avoid shilajit and binders, as contamination and safety data are lacking.
• People with kidney disease: some products contain minerals and metals that kidneys must clear.
• Anyone with genuine symptoms of metal exposure (for example, a child who has eaten old paint, or a job involving lead): see a GP. Heavy metal levels are measured with blood or urine tests, and treatment (chelation) is given under medical supervision. Hair tests and online "toxicity" quizzes are not reliable.

If you want to try one: what to look for

• No "detox" or disease claims: these break UK advertising rules and suggest a seller is cutting corners.
• Independent heavy metal testing per batch, with certificates you can read, especially for shilajit, clays and algae.
• Third-party certification such as Informed Sport, Informed Choice or NSF.
• A UK-based seller that follows UK food supplement law.

Bottom line

Your liver and kidneys are the real detox system, and no over-the-counter binder has been shown to improve on them in healthy people. Glutathione pills have mixed evidence, charcoal belongs in hospital, and shilajit may carry metals of its own. If you are worried about lead or mercury, reduce the source and ask your GP for a proper test.