Biologically active food Supplement “Birch” is a natural-balanced pasty product, in which the content of sugars and organic acids, vitamins, pectin, etc. far exceeds the content in birch SAP. Ingredients: a concentrated birch SAP is 100%. BAD resulting concentration of birch at temperatures up to 45○ C in a vacuum. The content of soluble solids of more than 75○ Brix. BAD rich in organic sugars, volatile, saponins, vitamins B1, B2, B3, B6, B9, B12, C, minerals K, Na, Ca, Mg, Al, Mn, Fe, Si, Ni, Cu, P, and tannins. BAD ready for immediate use and can be used to develop products for children and functional foods, improving the nutritional value of known products, creating food supplements, obtaining of the restored natural juice etc. BAD stimulates the metabolism, removes toxins, shown in diseases of the respiratory system, disorders of the liver; helpful in arthritis, sciatica, rheumatism, gout, gastric ulcer and duodenal ulcer. The yield is 0.7 %: to produce 1 kg of product requires 140 liters of birch SAP. Storage life: more than 3 years in normal conditions at room temperature. Specific gravity: 1.4 kg/L.