Dandelion for digestion and as a diuretic: forms, evidence and precautions

For the root, the EMA accepts a traditional use for relieving mild digestive disorders (a feeling of fullness, flatulence, slow digestion) and temporary loss of appetite. It also accepts a traditional use for increasing urine volume and helping to "flush" the urinary tract in cases of minor urinary trouble.

A review published in 2022 on gastrointestinal disorders describes mechanisms and results obtained in vitro or in animals with various constituents and preparations. It notes that clinical studies on efficacy, absorption and safety are still lacking.

A pilot trial published in 2009 tested a hydroalcoholic extract of fresh leaves in 17 volunteers, at a dose of 8 ml three times over the course of a day. Urination frequency increased after the first dose, and the ratio of urine volume to fluid intake increased after the second. The third dose changed none of the measured parameters.

A preparation intended to increase urine output requires drinking enough fluids, unless a doctor has asked you to limit them. Urinating more does not "detoxify" the body and does not treat a urinary tract infection.

The monographs distinguish, among others, dried root as a decoction, fresh root juice, liquid extracts, tincture, and a mix of root and aerial part as tea or as a solid or liquid preparation. Species, plant parts and preparations differ: a result does not automatically transfer from one form to another.

For lack of sufficient data, medicinal use of dandelion is discouraged during pregnancy and breastfeeding, unless a professional advises otherwise, and it is not recommended before age 12. An allergy to Asteraceae, the family dandelion belongs to, is possible.

Ask for advice if you take regular medication: the absence of a reported interaction in a monograph does not guarantee the absence of risk with every product.

Fever, pain or spasms while urinating, difficulty urinating, or blood in the urine call for medical advice. If digestive symptoms last more than two weeks or worsen, also consult a professional.