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. 2012 Jan 3;7(1):e29631. doi: 10.1371/journal.pone.0029631

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ß-carotene, the precursor to vitamin A, exhibits no inhibition at the doses studied. Maximal inhibitory activity against all MAP strains is observed with Retinyl acetate (solid black triangles.) Both Retinoic acid and 13-cis Retinoic acid exhibit intermediate inhibition.