Dextrose is a simple sugar that is derived entirely from corn starch. It is about 20% less sweet than regular cane sugar, and is the main energy source in our body. Dextrose is found naturally in our body as this is a by-product of carbohydrates, proteins and fats that are digested.
Took this a while back and noticed my energy levels increase,I cycle to and from work and it seems to make those hills a little easier to get up..full scoop in a cup of tea twice a day(or before and after work)its not as sweet as sugar so it tastes ok.also helps with lifting weights energy=motivation.anyway if you feel tired/lethargic this may improve your daily grind,it seemed to help me.