Bee propolis looks like the following picture:

Properties: propolis is lumpy or irregular pieces, greenish green, brownish yellow, brownish red, brown or dark brown, the surface or cross-section of the glossy. 20 ℃ below the gradual hardening, brittle, 20 ~ 40 ℃ gradually become soft, viscous and malleable. Gas aromatic, taste slightly bitter, slightly astringent, slightly numbing and pungent sensation.

Propolis quality standards: propolis contains a large number of flavonoids and polyphenols, and its physiological activity is also closely related to it, so the content of flavonoids and polyphenols in propolis is an important indicator for evaluating the quality of propolis.

Generally speaking, the total flavonoid content of propolis raw propolis is less than 11% for low-quality propolis, 11% to 14% for qualified propolis, 14% to 17% for superior propolis, >17% for high-quality propolis.

Expanded

The origin of propolis: honey bees from the buds of plants, bark or tree trunks to collect the resin, and mixed with the secretion of its frontal glands, beeswax and a small amount of pollen processed into a gelatinous mixture with an aromatic odor.

Propolis composition: propolis contains a variety of chemical components, mainly flavonoids, acids, alcohols, phenols, ketones, ethers, alkenes, hydrocarbons, terpenes, and fatty acids, steroids, a variety of amino acids, enzymes, polysaccharides and vitamins.

In addition, it also contains carbon, hydrogen, oxygen, nitrogen, calcium, phosphorus, chlorine, sodium, magnesium, sulfur silicon, iron, manganese, iron, copper, key, zinc, fluorine, tin, arsenic, selenium, milling, chromium, nickel, barium, zirconium, antimony, copper, silver, lead and other elements.

Baidu Encyclopedia - Bee Propolis Capsules