Vitamin A Is Rapidly Degraded in Retinyl Palmitate-Fortified Soybean Oil Stored under Household Conditions

Author(s)
Marc Pignitter, Bettina Dumhart, Stephanie Gartner, Franz Jirsa, Georg Steiger, Klaus Kraemer, Veronika Somoza
Abstract

Oil fortification with retinyl palmitate is intended to lower the prevalence of vitamin A deficiency in populations at risk. Although the stability of vitamin A in vegetable oil has been shown to depend on environmental factors, very little information is known about the stability of vitamin A in preoxidized vegetable oils. The present study investigated the stability of retinyl palmitate in mildly oxidized (peroxide value < 2 mequiv O

2/kg) and highly oxidized (peroxide value > 10 mequiv O

2/kg) soybean oil stored under domestic and retail conditions. Soybean oil was filled in transparent bottles, which were exposed to cold fluorescent light at 22 or 32 °C for 56 days. Periodic oil sampling increased the headspace, thereby mimicking consumer handling. Loss of retinyl palmitate in soybean oil by a maximum of 84.8 ± 5.76% was accompanied by a decrease of vitamin E by 53.3 ± 0.87% and by an increase of the peroxide value from 1.20 ± 0.004 to 24.3 ± 0.02 mequiv O

2/kg. Fortification of highly oxidized oil with 31.6 IU/g retinyl palmitate led to a doubling of the average decrease of retinol per day compared to fortification of mildly oxidized oil. In conclusion, oil fortification programs need to consider the oxidative status of the oil used for retinyl palmitate fortification.

Organisation(s)
Department of Physiological Chemistry, Department of Inorganic Chemistry
External organisation(s)
DSM Nutritional Products Europe Ltd, Sight and Life, Johns Hopkins University
Journal
Journal of Agricultural and Food Chemistry
Volume
62
Pages
7559-7566
No. of pages
8
ISSN
0021-8561
DOI
https://doi.org/10.1021/jf502109j
Publication date
07-2014
Peer reviewed
Yes
Austrian Fields of Science 2012
303009 Nutritional sciences, 104009 Food chemistry
Keywords
ASJC Scopus subject areas
Agricultural and Biological Sciences(all), Chemistry(all)
Portal url
https://ucrisportal.univie.ac.at/en/publications/vitamin-a-is-rapidly-degraded-in-retinyl-palmitatefortified-soybean-oil-stored-under-household-conditions(f1b9ae20-bfde-45a0-9ede-3fb1ec6c6669).html