Bouleau blanc herbalière

Betula alba leaves contain flavonoids, such as hyperoside and quercetin, which are believed to increase urine volume by stimulating renal blood flow and glomerular filtration. Additionally, saponins and volatile oils may contribute to this mild diuretic effect. This mechanism helps flush the urinary tract, supporting its traditional use as a urinary tonic (Evidence Level: C).

Yes, Betula alba may interact with pharmaceutical diuretics like furosemide or hydrochlorothiazide. Because birch leaf naturally increases urine output, combining it with prescription diuretics could potentiate effects, leading to dehydration or electrolyte imbalances. Patients taking Lithium should also exercise caution, as increased diuresis may alter drug clearance rates.

The standard adult dosage for Betula alba is 2-3 grams of dried leaf per cup of hot water, taken up to three times daily. Alternatively, a tincture dosage of 3-5 ml (1:5 strength) is common. It is best taken between meals to maximize diuretic effects.

Betula alba is generally considered safe during pregnancy when used at recommended therapeutic doses. Unlike harsh chemical diuretics, it provides gentle support for the urinary system. However, due to its diuretic action, pregnant women should ensure adequate hydration and consult a healthcare provider before use to rule out any kidney inflammation.

Traditionally, Betula alba is used to manage gout and rheumatism. Its diuretic action aids in the elimination of uric acid, a key factor in gout, while anti-inflammatory compounds like betulinic acid help reduce joint swelling. While evidence is limited to traditional use and pharmacological plausibility (Evidence Level: C), it remains a staple in European herbal rheumatic formulas.