Site of conversion of carotene into vitamin A in the rat: further studies on aqueous dispersions administered intravenously

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Abstract
Within 5 minutes of injection of 400 [mu]g carotene in Tween 40 the amount of vitamin A circulating in the blood of decapitated rats, or rats without lungs was essentially the same as that circulating in the blood of intact control animals. It is concluded that the ability to convert injected carotene is not an attribute of any one tissue or organ, but rather of many, or perhaps all, cells.