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  • Title: Effects of supplemental ascorbic acid on performance, organ weight and plasma cholesterol concentration in broilers treated with propylthiouracil.
    Author: Takahashi K, Akiba Y, Horiguchi M.
    Journal: Br Poult Sci; 1991 Jul; 32(3):545-54. PubMed ID: 1893265.
    Abstract:
    1. Four experiments were conducted to determine if dietary ascorbic acid (AA) affects body weight gain, food intake, organ weights, plasma cholesterol concentration, and ascorbic acid concentration in the plasma and liver of growing male broilers treated with an antithyroidal agent, propylthiouracil (PTU). 2. In the first experiment, 15 mg AA was administered daily into the crop of chicks fed on a diet supplemented with or without PTU (500 mg/kg). Administration of AA reduced plasma cholesterol concentrations in the PTU-treated chicks. 3. In the other three experiments, chicks were given the basal diet or an AA-containing (3 g/kg) diet supplemented with or without PTU (250 mg or 500 mg/kg). Feeding AA partly prevented the decreases in body weight gain, gain:food ratio and weights of the bursa of Fabricius and thymus in chicks fed on the 250 mg/kg PTU diet, and also prevented the increase in plasma cholesterol concentrations in chicks fed on the PTU diet. 4. These results suggest that AA improves the performance of chicks with experimentally induced hypothyroidism.
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