Activated charcoal tablets are sometimes recommended by the NHS as a remedy for bloating and flatulence, but their efficacy can be inconsistent and depend on the individual.
The porous structure of activated charcoal allows it to act like a sponge, binding to gases and toxins in the gastrointestinal tract through a process called adsorption. This means molecules stick to its surface rather than being absorbed into the bloodstream. It remains in the digestive system and is eventually passed out of the body.
Some individuals report benefits from charcoal tablets for occasional gas and bloating. However, consultant dietitian Sophie Medlin notes that not everyone experiences a noticeable improvement. "Some people can find them beneficial and they can help with things like bloating and gas, but it depends on the individual; not everybody notices a benefit," Medlin stated.
A small study involving patients in the US and India suggested that activated charcoal significantly reduced hydrogen levels in the colon, correlating with decreased bloating and gas pain. Nonetheless, more extensive and higher-quality research is required to draw definitive conclusions.
Activated charcoal is produced by heating carbon-rich materials like coconut shells or wood to high temperatures and then treating them to create a highly porous structure with a large surface area. This property makes it effective in water filters and in medical treatments for certain poisonings. Its reputation for binding impurities has also led to its inclusion in various wellness and beauty products, such as toothpaste, face masks, and cleansers. It has also been used as a culinary ingredient, imparting a dark color to foods and drinks.
However, experts caution that many of these broader claims are exaggerated. Medlin explains that while activated charcoal is used medically for overdoses, applying this principle to everyday consumption in juices or lattes for detoxification is scientifically unfounded. "The idea that putting it in a juice or latte will detox your body is nonsense," she said.
Considerations for Use
Despite its potential for alleviating gas, charcoal tablets can also interfere with the absorption of essential nutrients and medications. Because activated charcoal binds to substances, it can inadvertently bind to vitamins, minerals, and crucial drugs, including oral contraceptives. This can impede the body's ability to absorb them properly.
"If you take charcoal pills regularly, they can stop you absorbing medications, the contraceptive pill, nutrients, vitamins, and minerals," Medlin warned. "It's not something we should be taking regularly. It's more something you could try for occasional symptoms."
In emergency medical settings, activated charcoal is administered to mitigate the effects of drug overdoses. Studies have shown it can significantly reduce drug absorption, particularly when taken shortly after ingestion. However, it is crucial to emphasize that charcoal tablets should not be used as a home remedy for overdoses; immediate medical assistance should always be sought.
Furthermore, charcoal does not effectively bind to alcohol, making its use as a hangover remedy unlikely to be beneficial. The U.S. Food and Drug Administration (FDA) has previously issued warning letters to companies marketing activated charcoal products with unsubstantiated claims of detoxification or hangover cure efficacy.