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DigestionModerate evidence

Activated charcoal

Also known as: medicinal charcoal, activated carbon

Activated charcoal is a highly porous carbon (e.g. from coconut shells) that binds gases and many substances in the digestive tract onto its surface. EFSA has approved a claim for reducing excessive flatulence after eating.

What it is used for

  • excessive flatulence after meals – moderate evidence (EFSA claim at 1 g at least 30 minutes before and 1 g shortly after a meal)
  • acute diarrhoea – weak evidence
  • poisoning – used in hospital treatment, not as home prevention

Forms and how they differ

coconut capsules / tablets

common form for flatulence

powder

larger surface, better binding, less practical

combination with zeolite

quality depends on the label

When to take it

Shortly before and after a meal for flatulence; short-term.

Pairs well with

Plenty of water.

Do not combine / separate

Take medicines (including the contraceptive pill), vitamins and minerals at least 2–3 hours apart – charcoal may bind them and reduce their effect.

Watch out for

Not suitable with constipation, bowel obstruction or for long-term use. In poisoning or overdose call emergency services or a poison information centre immediately – do not self-treat. During pregnancy or breastfeeding, with kidney or liver disease, or when taking medicines, consult your doctor.

Safety

Turns stools black and may cause constipation. Do not exceed the label dose.

Practical tip

If you take the pill or regular medicines, plan charcoal so there is enough time between them.

Products containing Activated charcoal 2

Activated charcoal 575 mgcoconut shell · 575 mg / capsuleDigestion & gutLiver
Zeolite (clinoptilolite) + Activated charcoalclinoptiloliteDigestion & gutLiver
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence

Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.

Combination check

Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.

Check Activated charcoal with others

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Important notice

This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.