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“In experiments on albino rats it was shown that vitamin A deficiency delays and its excess enhances biotransformation of aminopyrine and benzoic acid.”
Biulleten' eksperimental'noi biologii i meditsiny • 1987 | View Paper
“The control groups received the diets containing normal amounts of vitamin A. The feeding of the high vitamin A diet increased the activities of aminopyrine demethylase and aniline hydroxylase in the guinea pig liver but not in the rabbit liver.”