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Plasma levels and apparent digestibility of alpha tocopherol as related to vitamin e supplementation in early weaned piglets



Plasma levels and apparent digestibility of alpha tocopherol as related to vitamin e supplementation in early weaned piglets



Fett Wissenschaft Technologie 93(1): 30-32



Piglets weaned at 21 d of age were fed a complete ration containing 16 I.U. vitamin E/kg (treatment I) according to NRC (1988) or supplemented with 45 mg or 225 mg .alpha.-tocopheryl acetate/kg (treatments II and III). Concentrations of .alpha.-tocopherol (AT) in plasma were measured until day 14. In weeks 5 and 7, the apparent digestibility of AT, total lipids and organic matter was analyzed using chronic oxide as a marker. In treatment I, plasma AT concentration decreased with a mean half-life of 11.4 d. In week 5, the apparent digestibility of AT was 17.3%, 23.6% and 17.1% in treatments I to III, respectively. In week 7, it was unchanged in treatment I while it was significantly higher (p < 0.05) in treatments II and III (46.6% and 55.4%). No age-dependent differences were found in the apparent digestibility of total lipids and organic matter.

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