Nicotinamide improves the growth performance, intermediary metabolism and glucose homeostasis of blunt snout bream Megalobrama amblycephala fed high‐carbohydrate diets

A 12‐week feeding trial was conducted to evaluate the effects of nicotinamide on the growth performance, glucose and lipid metabolism of blunt snout bream fed high‐carbohydrate diets. Fish were randomly fed four diets including two dietary carbohydrate levels (300 and 430 g/kg, deriving from corn starch) and two nicotinamide levels (0 and 31.0 mg/kg). Microcrystalline cellulose was incorporated to compensate for the carbohydrate levels required. High‐carbohydrate levels significantly (p