Conclusion
On the basis of the experiments reported here, stereoisomerization of beta-carotene is believed to occur both in vitro and in vivo in the presense of mineral oil. The lower biological activity of the stereo-isomers may account in part for the deleterious action of mineral oil on carotene utilization.
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Paul, M.F., Ells, V.R. & Paul, H.E. The effect of mineral oil on food utilization II. Changes of beta-carotene in mineral oil. Amer. Jour. Dig. Dis. 18, 278–282 (1951). https://doi.org/10.1007/BF02896449
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DOI: https://doi.org/10.1007/BF02896449