A recent study examined whether consuming sugary products (including sugary drinks) causes an improvement of mood and alertness - a "sugar rush" - and found that to be a total myth. After reviewing 31 studies (in which 1259 individuals participated), the researchers found that people do not get a "sugar rush" with an improvement in mood from consuming sugary products - instead it makes people feel less alert and more tired within an hour of ingestion.
From Science Daily: No such thing as 'sugar rush'! Sugar worsens mood rather than improving it
Sugar does not improve mood and it can make people less alert and more tired after its consumption -- according to a new study by the University of Warwick, Humboldt University of Berlin, and Lancaster University. ...continue reading "No Such Thing As A Sugar Rush"