Per serving or per day? If the latter, you're into VLCD/keto territory and that's a whole other animal and discussion. If per serving, that's a lot of sugar (vs say carbohydrates from any source) still, especially if it's multiple times per day, unless you're also very physically active.
Limiting sugar is always a good idea, and a simple way to lower cals, but it's still energy in/energy out equation that matters most to lose the fat.