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Study of Stability in the Riboflavin Content of Dietary Supplements on Storage Conditions  

Kim So-Hee (Seoul Regional Food and Drug Administration)
Kim Ji-Yeon (Seoul Regional Food and Drug Administration)
Lee Young-Ja (Seoul Regional Food and Drug Administration)
Publication Information
Journal of Food Hygiene and Safety / v.20, no.4, 2005 , pp. 225-231 More about this Journal
Abstract
This study was carried out to observe the stability of riboflavin in dietary supplements. Dietary supplements were in the type of tablet, powder, capsule and liquid. Various factors on the stability of riboflavin such as effect of light, storage temperature and time were examined using HPLC method. Samples were exposed to various temperatures (-9, 4, $30^{\circ}C$) and light at room temperature far 9 months. As well as storage period became longer, reduction rate constant of riboflavin increased. Riboflavin reduction rate constants were higher during storage with light than without light. And there was a significant difference of reduction rate constants in types of dietary supplement. In other words, riboflavin in tablet types was significantly more stable than the others, and liquid type was the most unstable. Therefore, type, light, and packing container of dietary supplements containing riboflavin would be considered in order to establish their appropriate shelf lives. In consideration with riboflavin decrease in dietary supplements, riboflavin would be appropriate for the nutritional labelling guide when predicting them at the end of shelf lives.
Keywords
Dietary supplement; riboflavin; stability;
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