Adipose tissue, carotene retinol

P-Carotene (provitamin A) is one of several naturally occurring precursors of vitamin A. Owing to inefficient intestinal conversion, only one-sixth of the dietary intake of 3-carotene is ultimately converted to retinol (Goodman, 1979). Additionally, as the amount of 3-carotene in the diet increases, the conversion to retinol decreases so that systemic vitamin A toxicity is not caused even by massive doses. A variable amount of 3-carotene is also absorbed unchanged from the intestine, enters into circulation, and is stored in adipose tissue. 

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