background: given the relationship of vitamin d deficiency with insulin resistance syndrome as the component of polycystic ovary syndrome (pcos), the main aim of this study was to compare serum level of 25- hydroxyvitamin d [25(oh)d] between pcos patients and normal individuals. materials and methods: a cross sectional study was conducted to compare 25(oh)d level between117 normal and 125 untre...

I. Reduced intake of energy or protein per se decreased riboflavin requirement of the chicks under restricted feeding regimens. 2. In severe riboflavin deficiency (2.26 mg/kg diet), efficiency of utilization of both energy and protein was decreased significantly under ad lib. conditions of feeding. 3. Efficiency of utilization of energy (but not protein) was decreased significantly in borderlin...

vitamin b12 (cobalamin) is an essential coenzyme for nucleic acid synthesis. animal protein is the major dietary source of vitamin b12. deficiency of vitamin b12 leads to megaloblastic anemia, degeneration of the brain, spinal cord, peripheral nerves, and abnormalities of epithelial tissues. two factors are necessary for the cure of megaloblastic anemia: one in food (extrinsic factor) and one i...