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Boll Soc Ital Biol Sper. 1984 Apr 30;60(4):769-75.

[Behavior of vitamin A, beta-carotene, retinol binding protein and prealbumin in the plasma of hypo- and hyperthyroid subjects].

[Article in Italian]


Plasma concentrations of beta-carotene and retinol, determined by HPLC, and of transport proteins, ascertained by immunodiffusion technique, in hypo and hyperthyroid subjects are reported. In hypothyroid subject a considerable increase in carotene was noted. This was not the case for retinol. In hyperthyroids both beta-carotene and retinol levels were found to be normal. Transport protein (PA and RBP) levels were found to be lower only in cases of hyperthyroidism but unchanged for hypothyroids. According to the Authors the results show that the alteration in plasma carotene levels to be found in hypothyroid subjects is not the direct consequence of a lack of thyroid hormone in the metabolism of vitamin A but the indirect effect of thyroid disease.

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