What's the difference between glucose and dextrose? Which one's faster digested by the body?
They are the exact same thing.
As far as I remember dextrose= glucose. Dextrose is just another name for it when it's not in the body.
Dextrose is a form of glucose, also known as D-glucose. Glucose is a stereoisomer meaning it can exist as a compound with the atoms in the same order but with different spatial configurations. D and L forms are mirror images of one another, enantiomers, like a left and right shoe. The body cannot metabolise L-glucose, so in that respect assuming that glucose you obtain is a mix of equal L and D forms then you won't be able to use the L form.
So dextrose is completely digestable while glucose is not.