From what age i can start to give my baby Milo or Ovaltine? She's 15 mo now.

I wouldn't give either until much older, about 3-4 years old at least - but that's just me! Do note that these are loaded with sugar and sweeter than most other things, so if you do give them, please just do it minimally because you wouldn't want your child to end up liking the flavour and rejecting everything else that's not as sweet.