Hops contain many substances, such as resins, essential oils, polyphenols, proteins and inorganic salts of amino acids. The most important components of hops in beer brewing are hop resins, hop oils and polyphenols, which give beer its characteristic bitterness, aroma and stability. Hops generally u

How to distinguish the quality of beer 1. The appearance of beer 2. The foam of beer 3. The aroma of beer 4. The taste of beer