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Retinyl palmitate isomers in skim milk during light storage as affected by ascorbic acid

Retinyl palmitate isomers in skim milk during light storage as affected by ascorbic acid

Journal of Food Science 63(4): 597-600

Effects of ascorbic acid addition on the contents of retinyl palmitate isomers in skim milk treated with or without 3 mg/mL added riboflavin were studied during storage for 30 h under fluorescent light. Light illumination induced the reduction of all-trans-retinyl palmitate and 13-cis isomer, but promoted the production of 9-cis isomer in the skim milk. Riboflavin increased the reduction of all-trans-retinyl palmitate, but decreased the formation of 9-cis isomer in light-stored skim milk. The addition of ascorbic acid greatly inhibited the light-induced reduction of all-trans-retinyl palmitate and 13-cis isomer in skim milks. Ascorbic acid also greatly increased the formation of 9-cis-retinyl palmitate in skim milks during light storage.

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Accession: 003260852

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DOI: 10.1111/j.1365-2621.1998.tb15793.x

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