In vitro metabolism of rebaudioside B, D, and M under anaerobic conditions: Comparison with rebaudioside A
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- 作者：Sidd Purkayastha ; George Pugh Jr. ; Barry Lynch ; Ashley Roberts ; David Kwok ; Stanley M. Tarka Jr.
- 关键词：%CV ; percent coefficient of variation ; ADI ; acceptable daily intake ; BHI ; brain heart infusion broth ; DMSO ; dimethyl sulfoxide ; F1 ; F2 ; female fecal homogenate samples #1 and #2 ; FDA ; United States Food and Drug Administration ; GRAS ; generally recognized as safe ; HPLC ; high performance liquid chromatography ; JECFA ; Joint FAO/WHO Expert Committee on Food Additives ; LC/MS ; liquid chromatography/mass spectrometry ; LLOQ ; lower limit of quantitation ; M1 ; M2 ; male fecal homogenate samples #1 and #2 ; Q
- 刊名：Regulatory Toxicology and Pharmacology
- 出版年：March, 2014
- 年：2014
- 卷：68
- 期：2
- 页码：259-268
- 全文大小：596 K
文摘
The hydrolysis of the steviol glycosides rebaudioside A, B, D, and M, as well as of steviolbioside (a metabolic intermediate) to steviol was evaluated in vitro using human fecal homogenates from healthy donors under anaerobic conditions. Incubation of each of the rebaudiosides resulted in rapid hydrolysis to steviol. Metabolism was complete within 24 h, with the majority occurring within the first 8 h. There were no clear differences in the rate or extent of metabolism of rebaudioside B, D, or M, relative to the comparative control rebaudioside A. The hydrolysis of samples containing 2.0 mg/mL of each rebaudioside tended to take slightly longer than solutions containing 0.2 mg/mL. There was no apparent gender differences in the amount of metabolism of any of the rebaudiosides, regardless of the concentrations tested. An intermediate in the hydrolysis of rebaudioside M to steviol, steviolbioside, was also found to be rapidly degraded to steviol. The results demonstrate that rebaudiosides B, D, and M are metabolized to steviol in the same manner as rebaudioside A. These data support the use of toxicology data available on steviol, and on steviol glycosides metabolized to steviol (i.e., rebaudioside A) to substantiate the safety of rebaudiosides B, D, and M.