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The objectives of this study were to assess the retinol concentration in the serum of human immunodeficiency virus (HIV)-positive patients, all former injection drug users (IDUs), and to evaluate the prognostic value of vitamin A status in relation to this patient group. Observations were carried out in the group of 75 patients, both male and female, who were divided into a control group consisting...
One of the major dietary sources of vitamin A in the human diet is provitamin A carotenoids. However, the activity of these carotenoids as a vitamin A source is uncertain due to concerns about the bioavailability of the carotenoids from vegetables. This study evaluated the bioavailability of provitamin A carotenoids from native Brazilian dark-green vegetables. Vitamin A-depleted rats were fed a basal...
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