Dextrose is popular as a fermentable sugar due to it's high level of fermentability. It will also give you a cleaner fermentation.
Use Dextrose/Glucose powder to produce a better quality wash for distilling.
If used as an ingredient in brewing beer, it will result in a dryer beer (less flavour) than if using pure malt extract or LME.
Buy a box of 12 for a discounted price.
Also available in 25kg bags.
