Scheid M M A, Genaro P S, Moreno Y M F, Pastore G M
Department of Food Science, School of Food Engineering, University of Campinas, Campinas, São Paulo, Brazil,
Eur J Nutr. 2014 Oct;53(7):1457-64. doi: 10.1007/s00394-013-0648-x. Epub 2014 Jan 8.
Freeze-dried powdered yacon (FDY) can be considered a prebiotic product due to its fructooligosaccharides (FOS) content. The effect of 9 weeks of daily intake of FDY containing 7.4 g of FOS on glucose, lipid metabolism and intestinal transit in a group of elderly people was investigated.
Seventy-two elderly (mean age 67.11 ± 6.11) men and women were studied for 9 weeks in a double-blind, placebo-controlled experiment. They were randomly assigned to the supplement group (which received 7.4 g of FOS as FDY) or the control group. At the beginning and end of the study, anthropometric measurements, blood sampling, clinical analyses and dietary intake were assessed.
A daily intake of FDY containing 7.4 g of FOS for 9 weeks was associated with a mean decrease in serum glucose (p = 0.013), but supplementation did not reduce serum lipids in the study group. The administered dose did not adversely affect intestinal transit. It did not cause bloating, flatulence or intestinal discomfort.
Freeze-dried powdered yacon is a good source of FOS, and daily consumption can have a favourable effect on serum glucose in the elderly. It is also practical, easy and safe to use and store.
由于冻干的雪莲果粉末（FDY）含有低聚果糖（FOS），可被视为一种益生元产品。本研究调查了一组老年人每日摄入含7.4克低聚果糖的冻干雪莲果粉末9周对其血糖、脂质代谢和肠道转运的影响。
在一项双盲、安慰剂对照实验中，对72名老年人（平均年龄67.11±6.11岁）进行了为期9周的研究。他们被随机分为补充组（接受7.4克作为冻干雪莲果粉末的低聚果糖）和对照组。在研究开始和结束时，评估了人体测量指标、血液采样、临床分析和饮食摄入量。
连续9周每日摄入含7.4克低聚果糖的冻干雪莲果粉末与血清葡萄糖平均降低有关（p = 0.013），但在研究组中补充剂并未降低血脂。给药剂量对肠道转运没有不利影响。它没有引起腹胀、肠胃气胀或肠道不适。
冻干雪莲果粉末是低聚果糖的良好来源，每日食用对老年人的血清葡萄糖有有益影响。它使用和储存也很实用、简便且安全。
