Never touched it. It's expensive milkshake to me! A balanced diet for a toddler really ISN'T that hard to achieve, and as someone up above mentioned, there are plenty of vitamin supplements on the market if you can see bubs isn't doing too great. As for all the immunity crap on the ads - if you can continue to BF just ONCE a day (so bedtime or first thing if you're out at work all day) you will be doing vastly more than the formula can do in that direction.

Bx