Scientifically no. But in real life my kids go mental after sugary treats. There is definitely a psychological ‘rush’.
BTW I’ve been on a sugar free diet for the past 4 weeks, (did it to support Mrs Elliott-20), and I can honestly say I’ve never felt so ‘refreshed’. Waking up is easier, no more afternoon slumps or the need for a mid-morning pick-me-up. Less headaches and I’ve lost about 6 pounds doing practically nothing!
Sugar is bad, and it certainly effects us a lot. So going back on topic, I believe there is such a thing as a sugar ‘rush’. A physiological and psychological reaction, but it can depend upon many other factors that a controlled study might not be able to recreate.