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Vitamins B2 and B6 serve as cofactors in enzymatic reactions involved in tryptophan and homocysteine metabolism. Plasma… Expand Purpose: To assess the prevalence of vitamin C deficiency within a group of hospice patients. To assess the relationship between… Expand Marginal deficiency of vitamin B6 has recently been related to cardiovascular diseases. Because of that there is an increasing… Expand We describe a procedure for the measurement of pyridoxal 5'-phosphate and of 4-pyridoxic acid in human plasma samples. It is… Expand Concentrations of pyridoxal phosphate and pyridoxic acid were measured in fasting plasma samples from British men and women aged… Expand For the determination of vitamin B6 vitamers (pyridoxal phosphate, pyridoxamine phosphate, pyridoxal, pyridoxine, pyridoxamine… Expand Over the past 50 yr there has been an increased awareness of the importance of vitamin B-6 in human nutrition. The knowledge base… Expand Micellar electrokinetic capillary chromatography (MECC) involves the application of a high voltage (10 to 40 kV) across a… Expand A high performance liquid chromatographic method is presented for the determination of the vitamin B6 metabolite, 4-pyridoxic… Expand The existence of a fluorescent compound in human urine after the ingestion of vitamin Be was reported by Singal and Sydenstricker… Expand