Methyl-B 12 is absorbed by an intestinal mechanism using intrinsic factor and by a diffusion process in which approximately 1% of the oral dose is absorbed. The human physiology of vitamin B 12 is complex, and therefore is prone to mishaps leading to vitamin B12 deficiency.ecause intrinsic factor is crucial for the normal absorption of B 12, its lack in pernicious anemia causes a vitamin B12 deficiency. Many other subtler kinds of vitamin B 12 deficiency and their biochemical effects have since been elucidated.
Gail Levin, âEdward Hopperâs Nighthawks, Surrealism, and the War,â Art Institute of Chicago Museum Studies 22, 2 (1996), pp. 180-95, fig. 1. The Art Institute of Chicago: Twentieth-Century Painting and Sculpture, selected by James N. Wood and Teri J. Edelstein (Art Institute of Chicago, 1996), p. 85, ill.
1 US artist Michael Benson says the Whirlpool Galaxy inspired van Gogh. 2  The Dutch painter created arguably his most famous work-The Starry Night-in 1889 from the view out of his asylum window. 3  But in 1850, an astronomer had depicted what a distant spiral galaxy might look like for the first time.