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“It is suggested that cholestyramine produced malabsorption of vitamin D by sequestrating bile salts in a patient with an already abnormal enterohepatic circulation.”
“The absorption of 10 μg doses of vitamin D3 -3H in rats was found to be decreased by the addition of cholestyramine to the diet in an amount sufficient to cause steatorrhoea.”
“These findings show that the administration of cholestyramine causes a reduction in the absorption of vitamin D3 -3H but not of radiocalcium.”