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.
High: At or above 240 mg/dL. If your total cholesterol is high, you have twice the risk for heart disease as a person with normal total cholesterol. Here is the adult range for HDL cholesterol: Normal: 35 to 65 mg/dL for men, 35 to 80 mg/dL for women.If your number is less than 25 mg/dL, your risk for coronary heart disease is doubled. If your number is between 60 and 74 mg/dL, your risk for coronary heart disease is below average.f your total cholesterol is high, you have twice the risk for heart disease as a person with normal total cholesterol. Here is the adult range for HDL cholesterol: Normal: 35 to 65 mg/dL for men, 35 to 80 mg/dL for women.