Yellow birch ( Betula alleghaniensis)
Other Names: Cost Betula alba, Betula pendula Roth, biezo, bieso, bedul.
Parts used: Bark, leaves and buds.
Properties: Antispasmodic, Anti-inflammatory, Antirheumatic, Antalgia, Purifying, Diuretic.
The leaves contain:
• Triterpene saponins.
• Flavonoids (3.3%). Hyperoside (0.8%), avicularina (0.57%) of mircitrina glycoside (0.37%), quercetin (0.25%) and quercitrin (0.14%).
• Phenolic acids derived from cinnamic acid. Chlorogenic acid.
• Vitamin C.
The bark contains:
• Gallic tannins, ellagic and cateticos (10-20%).
• Diterpenes. Betulinol.
• Essential oil (1%).
• Sesquiterpenes; betulenoles.
• The leaves have diuretic properties due to the presence of flavonoids, used in the cases of urinary tract diseases, such as cystitis, pyelonephritis, lithiasis, oliguria and dropsy.
• Antipyretic, due to properties that give essential oils as the betulin.
• Cholagogue / choleretic. Leaves increase production of bile.
• Healing: The crust, for its high content of tannins have astringent effect on the skin, promoting wound healing.
• The SAP has diuretic and anti-rheumatic action, so it is used in processes of gout and rheumatism.
• Cardiology: Hypertension.
• Urology: Fluid retention.
• Rheumatology: Myalgia. Sciatica.
• Endocrinology: Obesity.
• Neurology: Headaches, Migraines.
• Liver-Gallbladder: Liver failure.
Method of preparation:
The leaves are used in infusion. Add 35 grams of leaves to one liter of water, leaving them in contact with boiled water and leave it on the fire for ten minutes to reach 40° C and then add a gram of sodium bicarbonate, thus it increases their effectiveness. You can take up to three cups a day. bark decoction is also prepared.
Contraindications and Side Effects:
peptic ulcer, gastritis. Use with caution in cases of kidney failure and heart failure. There are not enough studies demonstrating their safety during pregnancy and lactation.