Dandelion tea is generally considered safe in amounts commonly found in food, but consuming larger amounts or using it medicinally can lead to a variety of side effects and health risks[2].
- Digestive Issues: Some people may experience stomach discomfort, diarrhea, heartburn, or mild abdominal pain[1][3][7].
- Allergic Reactions: Allergic reactions such as skin rash, hives, or oral allergy syndrome can occur, especially in people allergic to ragweed, daisies, marigolds, and related plants, though evidence is mixed[2][5][7]. Contact dermatitis is also possible from handling dandelion[1].
- Increased Urination: Dandelion acts as a natural diuretic, leading to more frequent urination and potential fluid loss[4][3].
- Drug Interactions: Dandelion can interfere with various medications:
- Blood thinners and antiplatelets: Increases risk of bleeding[5][7].
- Diabetes medications: May lower blood sugar excessively[1][5].
- Diuretics: Risk of electrolyte imbalance, especially potassium[5][8].
- Medications metabolized by the liver: Dandelion may inhibit liver enzymes (like CYP3A4), affecting medication levels[1][8].
- Antacids and antibiotics: May reduce efficacy of these medicines[5][8].
- Rare but Serious Effects:
- Hemorrhagic cystitis and acute liver injury have been reported in case studies after high intake of dandelion tea or supplements[1].
- Digital necrosis due to possible oxalate accumulation in those with kidney disease after excessive consumption[1].
- Special Populations: There is little reliable information on the safety of dandelion in pregnant or breastfeeding individuals, so its use should be avoided in these groups[2][7]. Children under 18 should also avoid medicinal use due to lack of safety data[3].
- Other Considerations: Dandelion may cause increased bruising in people with bleeding disorders[3][7]. Those with eczema may be prone to stronger allergic reactions[2][7]. If you have kidney problems, check with your healthcare provider before using dandelion tea[8].
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