Propolis (bee glue) strengthens the immune system, increases the number of red blood cells. Propolis fight viral and bacterial organisms in the body. Propolis is a resinous substance with a shimmering dark yellow to brownish-green color. Bees prepare the propolis from waxes, gums and gums that some plants emit through their bark and buds. The bees process them through their jaws, sifting it with saliva, transporting it to the hive, and polishing each surface with propolis, thus protecting it from microorganisms.