Glucose powder????

Ok moms i have a question so my MIL is obsessed with this idea of giving my 2 month old son this glucose powder stuff all day to keep him awake all day with no naps too sleep all night. ( he takes 3 to 4 naps a day) he finally started sleeping thru the night for the past week. He only wakes me up one to two times to eat. My husband and i said no to this powder we dont like it. But she wont stop bringing up any chance she gets. Like when she has friends over she goes.....yeah i told them about this powder etc etc but they said no. So my question moms is have you ever used this product before? Or even heard of this? It just doesnt seem healthy to us for him to eat that all day. ( she will be the babysitter when i start work again). Thanks for your help.

Edited: wow i wasn't expecting all this feedback thank you so much ladies its appreciated so much. It definitely confirms my husbands and my fears. My son sleeps thru the night only wakes us up 1 to 2 times to eat. Takes 3 to 4 naps a day which is normal. Im not sure why shes so set on this stuff its annoying she knows we dont want it and we arent comfortable with it. I decided to look it up ( yeah i know you cant google everything ) im seeing such negative things from drs i told my hubby about it and we need to find a delicate way to tell her no he says and we cant tell her the pediatrician said no because she says the pediatrician doesnt know shit. Ugh....