Wah! Mt - Zav liek got so much to eat. Haha.
I also ever asked my doc abt giving supplments, like what MT says balance and healthy diet is most impt, eat according to the pyramind chart. But because VitC cant be retained in the diet so I still give him daily doses.
My doc is also a father, so whatever he gives to his child I will follow him. However he did comment that all vitamins in SG are not certified by HSA, so take it with a pinch of salt. He prefers to use good old brands that are in SG for long time like scotts emulsion. Colustrum extract (ie not from mother's milk) he said is quite new in the market so "the results" might not have been tested, that's why he didnt recommend me to get it. So now, I'm feeding Emerson only Scott's Emulsion (Orange) with Vit C. I stopped his Enervon C because with his food and 2 kinds of Vits, I scare I overdose him.
YB - If u want to strengthen immune system, VitC, A and B does the job. So U might want to consider multi vit with C for Kay. Pre/Probiotic protects the bb's gut, so they dont get diahoerr and vomitign easly, this are avaible in certain FM (GainIQ, Pediasure, Nestle range etc) and some yogurt as well.
Bear in mind also if u are giving more that 1 kind of vit, daily doses of Vit A shld not exceed 2000 IU for our babies otherwise will cause intoxification.