Hey there, I would advise you to start by getting a couple of them only just to try them out. Last time I went to the pharmacist, I was like 'Oh and give me 7 flapjacks for my lunches'.
Dear God, I managed to eat one only (and nearly with tears running down my face) and had to bring the remaining ones to the pharmacist to swap them with shakes.
Good luck with them. Then again, everyone is different and you might tolerate them.