The content in the sow’s plasma and in the milk rises linearly when the concentration of vitamin E in the feed is increased from 70 to 250 mg/kg and this response is maintained throughout lactation. At the time of weaning (at 28 days) the concentration of α – tocopherol in the liver of piglets of which the mothers received 250 mg/kg is more than double than of piglets from dams receiving 70 mg/kg..