[Vitamin A and carotene in thyroid diseases].
From 190 goitrous patients (106 euthyroid, 53 hyperthyroid, 31 hypothyroid) serum levels of vitamin A and carotene were obtained. The serum levels of vitamin A were significantly decreased in both hyperthyroidism and hypothyroidism, the serum levels of carotene in hypothyroidism only. Remarkably, vitamin A levels almost never drop to subnormal values in hyperthyroidism. There is evidence, that a sufficient dietary protein supply enables the liver cell to produce enough amounts of retinol binding protein and prealbumin to overcome the increased clearance observed in hyperthyroid conditions.
D002338:Carotenoids / Q000097:blood*; D006801:Humans; D006980:Hyperthyroidism / Q000097:blood*; D007037:Hypothyroidism / Q000097:blood; D013959:Thyroid Diseases / Q000097:blood*; D014801:Vitamin A / Q000097:blood*
D014801:Vitamin A; D002338:Carotenoids
Vitamin A und Carotin bei Schilddrüsenkrankheiten.