Yup, no different than someone in contest prep. When you are flat you adjust food not drugs.
Nothing wrong with quest products and sugar alcohols but they will impact your flat/fullness more as opposed to food, along with the fiber they include.
It's just a basic balance of sodium, water, carbs, fiber, sugar alcohols, etc. Most people are not flat anyway...they are just seeing bodyfat more. You need to be pretty depleted in a low calories state for a short period of time.
Don't stress over it. Not remotely important for your goal/situation. You should be focused more on performance at this point. IMO