PROBLEM TO BE SOLVED: To provide a blood glucose level spike improving agent and a blood glucose level improving composition, which gently increase blood glucose level in a case of low blood glucose level and gently reduce blood glucose level in a case of high blood glucose level so as to actively normalize blood glucose level for improving blood glucose level spike and borderline diabetes, improving hypoglycemia, improving postprandial sleepiness, malaise, headache, poor concentration and poor judgment which are caused by hypoglycemia and blood glucose level spike, and also gently improving hyperglycemia.SOLUTION: A blood glucose spike improving agent and a blood glucose level improving composition have a synergistic effect of Lactobacillus delbrueckii LAB4 lactic acid bacteria and low GI hydrophilic foods which gently increase blood glucose level in a case of hypoglycemia and gently reduce blood glucose level in a case of hyperglycemia so as to actively normalize blood glucose level for improving blood glucose level spike and borderline diabetes, improving hypoglycemia, improving postprandial sleepiness, malaise, headache, poor concentration and poor judgment caused by hypoglycemia and blood glucose level spike, and also gently improving hyperglycemia.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】本発明は、低血糖に対しては穏やかに血糖値を上げ、高血糖に対しては穏やかに血糖値を下げることにより、血糖値を積極的に正常化させて血糖値スパイク、境界型糖尿病を改善し、低血糖を改善すると共に低血糖及び血糖値スパイクによる食後の眠気・倦怠感、頭痛、集中力・判断力の低下などを改善し、穏やかに高血糖も改善できる血糖値スパイク改善剤及び血糖値改善組成物に関する。【解決手段】血糖値スパイク改善剤及び血糖値改善組成物は、ラクトバチルス・デルブルッキーLAB4乳酸菌と低GI値親水性食品の相乗効果で、低血糖に対しては穏やかに血糖値を上げ、高血糖に対しては穏やかに血糖値を下げることにより、血糖値を積極的に正常化させて血糖値スパイク、境界型糖尿病を改善し、低血糖を改善すると共に低血糖及び血糖値スパイクによる食後の眠気・倦怠感、頭痛、集中力・判断力の低下などを改善し、穏やかに高血糖も改善できる。【選択図】図1