First, you can add it anytime during the boil. Second, most IIPA’s have sugar added because it can increase gravity without adding additional body to the beer. Sugar is basically 100% fermentable. Third, many Belgian styles have sugars added sometimes up to and over 20% of the grain bill. I use 1 lb of table sugar to my Double IPA for a 5 gallon batch. Last, no worries about weird flavors because it leaves no flavor behind unless maybe you use more than 50% of the grain bill.
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