Garlic is widely used in cooking and has been studied for possible antimicrobial and other health effects, but there is not enough clinical evidence to show that eating raw garlic can reliably treat intestinal parasitic infections in people.
Claims that raw garlic can kill worms, prevent parasites from hatching or eliminate an existing parasitic infection are not established treatments for human parasitic infections. Evidence from laboratory or animal studies cannot by itself show that the same effect occurs in people.
Garlic contains sulfur-containing compounds, including allicin, which are responsible for much of its characteristic smell and have been investigated for biological effects. Some laboratory studies have found activity against certain microorganisms and parasites, but that does not establish raw garlic as an effective treatment for an infection in humans.
The type of parasite also matters. Parasitic infections can be caused by different organisms, including intestinal worms and protozoa, and they do not all respond to the same treatment.
For people who suspect they have a parasitic infection, diagnosis is important before treatment. Depending on the suspected infection and symptoms, a health professional may use medical history, examination, stool testing or other tests to identify the cause.
Treatment varies according to the parasite. Some infections are treated with specific antiparasitic medicines, while others require different approaches. Using an unproven remedy in place of appropriate treatment can allow an infection to persist.
Garlic can still be part of a normal diet for most people. Eating it as food is different from using it as a substitute for treatment.
Applying raw garlic directly to the skin is also not a recommended treatment for parasitic infections. Garlic can irritate the skin and may cause burns, particularly when it is left against the skin for prolonged periods.
People with persistent diarrhoea, unexplained weight loss, prolonged abdominal pain, blood in the stool, or other concerning symptoms should seek medical advice rather than attempting to treat the problem solely with home remedies.
The available evidence therefore does not support the claim that eating raw garlic is a proven way to eliminate parasites. Garlic may have biological effects that continue to be studied, but laboratory findings and traditional claims are not a substitute for evidence-based treatment of confirmed parasitic infections.
