Vitamin B-12 deficiency is associated with an elevated HC. The prevalence of hyperhomocysteinemia in the general population is 5-10%; in people older than 65 years it may reach 30-40%. Elevated HC is a risk factor for coronary artery, cerebrovascular, and peripheral vascular diseases and venous thrombosis.hildren require 0.7 mcg/d and, in adolescence, 2 mcg/d. Because vitamin B-12 is highly conserved through the enterohepatic circulation, cobalamin deficiency from malabsorption develops after 2-5 years and deficiency from dietary inadequacy in vegetarians develops after 10-20 years.
Articles for Teachers. How long does a teacher have to go to school. By:mt. For some of the time a teacher spends in school, every one should go to school. From kindergarten to graduation from high school is 13 years. Everyone in the U.S. is expected to have that much schooling.
  The most basic college degree to become a school teacher is called a Bachelor Degree. It usually takes 4 years to complete a Bachelor's Degree in Education. My sister completed a Bachelor's Degree in Physical Education at Florida State University in about 4 years in 1968.f you are just getting started it will take 4 years to get your Bachelor's ma â¦ ybe more or less it depends on he amount of classes you take per semester. After you graduate you will have to become certified. If you pass you are clear to work.