Ella Olla Unflavored Multivitamin?

Has anyone tried this? My 4 year old will only eat frozen chicken nuggets, pizza, and peanut butter sandwiches. Even those things he will eat tiny quantities. I’d love to give him some kind of multivitamin but he won’t eat the gummies and will only drink water and typically feels the texture difference with powders mixed in there.

I’ve seen this one dissolves well but looking for real feedback.