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A sugar crash or glucose crash is the fatigue after consuming a large quantity of carbohydrates, also known as reactive hypoglycemia. It is variously described as a sense of tiredness, lethargy, irritation, or hangover, although the effects can be less if one has undertaken a lot of physical activity within the next few hours after consumption. The alleged mechanism for the feeling of a crash is correlated with an abnormally rapid rise in blood glucose after eating. This normally leads to insulin secretion (known as an ''insulin spike''), which in turn initiates rapid glucose uptake by tissues either accumulating it as glycogen or utilizing it for energy production. The consequent fall in blood glucose is indicated as the reason for the "sugar crash". ==Symptoms== Symptoms associated with sugar crashes are similar to those experienced during periods of hypoglycemia, though not as severe. This is because the difference between usual and post-meal blood glucose levels is not as large as in diabetic cases of hypoglycemia. A crash is usually felt within four hours or less of heavy carbohydrate consumption. Symptoms of reactive or postprandial hypoglycemia include: *Confusion and difficulty concentrating on daily tasks *Anxiety *Light-headedness *Fatigue *Headache *Irritability The majority of these symptoms, often correlated with feelings of hunger, mimic the effect of inadequate sugar intake as the biology of a crash is similar in itself to the body’s response to low blood sugar levels following periods of glucose deficiency.〔(【引用サイトリンク】url=http://www.eatright.org/Public/content.aspx?id=6818 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sugar crash」の詳細全文を読む スポンサード リンク
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