I have claimed over and over that I do not overeat and never have done, but there's always 'that look' - I am sure that many others will have seen it.
Long before diagnosis I was actually called a liar when I had appointments at the GP surgery on consecutive days and was weighed both times. I was heavier on the second one, having rehydrated after a long hot day in the factory, but I'd been too tired and distressed to eat after falling and hurting my ankle, however I was berated for the gluttony of drinking around 3 litres of water between the appointments.
That attitude is so strongly held it is impossible to deny it with the truth - but the shakes must be an easily absorbed carb as far as I am concerned - one shake and a small meal, 22 hours of fasting a day and my HbA1c was higher than I expected.