Share. Intrinsic factor is the most obscureâyet the most importantâglycoprotein in the human body. It has only one primary function that is essential for good health. Produced by the parietal cells of the stomach as well as the salivary glands, intrinsic factor has a brief, but very important life.Intrinsic factor is key for supporting energy, metabolism, and mental health by working with one nutrientâvitamin B12.ntrinsic factor is the most obscureâyet the most importantâglycoprotein in the human body. It has only one primary function that is essential for good health.
Types of Bike Helmets. There are three types of bike helmets: recreational, road and mountain. Recreational bike helmets may also be called multi-use or casual helmets. All three of these types have the same purpose which is to protect your head from impact and injury in the event of an accident.
A male competitive cyclist wearing a bicycling helmet. A helmet is a form of protective gear worn to protect the head from injuries. More specifically, a helmet aids the skull in protecting the human brain. Ceremonial or symbolic helmets (e.g. UK policeman's helmet) without protective function are sometimes used. The oldest known use of helmets was by Assyrian soldiers in 900 BC, who wore thick leather or bronze helmets to protect the head from blunt object and sword blows and arrow strikes in combat.