Originally Posted by schmeek
I just spoke w my lhbs and he said adding sugar will only add to your FG. He also said that sugar is more complex than malt sugars so I should have added it to the boil in place of some of the malt.
What? Perhaps there was a misunderstanding. Are you adding something like lactose sugar?
It is exactly the opposite. Maltose (malt sugar) is more complex than simple sugars like sucrose and dextrose. It will increase your ABV, but not your FG.
This is why many Belgian beers and high gravity beers use sugar to dry out the beer, because it lowers the FG leading to a drier taste and a lighter body.