It was Christmas week 1990 in Oakland. Steven Bloom was wandering through The Lot, that timeless gathering of hippies that springs up in the parking lot before every Grateful Dead concert, when a Deadhead handed him a yellow flyer.
Because of the general safety of the vitamin, upper limits for normal intake do not exist. If your blood values for the vitamin fall below a range of 170 to 250 picograms per milliliter, you may develop a B12 deficiency.
A vitamin B12 level test measures the amount of B12 in your blood. B12 is an important vitamin for many basic bodily functions, such as brain health, blood cell production, and proper nerve functioning.Low B12 levels can lead to serious nerve damage and deteriorating brain functions. vitamin B12 level test measures the amount of B12 in your blood. B12 is an important vitamin for many basic bodily functions, such as brain health, blood cell production, and proper nerve functioning.