LeavesBrusniki have an extensive antiseptic, anti-inflammatory and diuretic effect, which causes their greatest use in the treatment of diseases of the kidneys, gastrointestinal tract and bladder. Cranberry leaf preparations are widely used for avitaminosis, constipation, diseases of the gastrointestinal tract, diabetes, cystitis, urolithiasis, pyelonephritis, prostatitis, gastritis with reduced acidity, swelling and diseases of the oral cavity (periodontitis, stomatitis, gingivitis). Lingonberry leaves are also often used to treat joint diseases: arthritis, polyarthritis, osteochondrosis, gout, rheumatism.Berries and lingonberry leaves are traditionally used in many fields: cooking, cosmetology, beekeeping, medicine. Yes, dishes and drinks made on the basis of this berry have been known for more than one hundred years. The beneficial properties of lingonberry fruits and leaves have made it a very common medicine both in scientific medicine and in folk medicine. Cranberry leaves include such substances as arbutin, tannin, hydroquinone and vitamin C. In addition, they contain a high content of various acids: tartaric, gallic, quinic, carboxylic. Flavonoids and tannins are also found in the leaves.