however , other indices of vitamin b6 nutritional state , including urinary 4-pyridoxic acid excretion , urinary cystathionine excretion , plasma pyridoxal phosphate concentrations , and erythrocyte aspartate and alanine aminotransferases were not different between controls and oral contraceptive users .
C0087162
vitamin b6
C0034266
pyridoxal phosphate