WHO says that -I've never heard of it ? ?
Some babies may have reactions to Vitamin C, so oranges (and tomatoes) may not be best to feed a young child. Bananas are not usually a problem, as long as they are sufficiently ripe.
In either case, you should hold off starting solids until the child is approximately six months of age. I realize some doctors are now saying it's okay to start the baby on solid foods at around four months, but in my opinion, that's too soon. (I happen to believe that the earlier you start a child on solids, the more likely s/he is to develop food allergies or sensitivities.)
It is up to you to determine the best time to start solids, but whenever you choose to do so, be sure that you introduce no more than 1 or 2 new foods at a time and wait about a week before introducing something else. That gives you time to notice any sensitivity symptoms that may come up (rash, diarrhea, etcetera) and identify which food is causing it.
There are also certain foods that you should avoid until your child is older. Honey, for instance (it may contain botulism spores that a young child's digestive system cannot handle). Your child's pediatrician should be able to answer your questions and give you further advice.
P.S. I see that your topic mentions your baby's skin color. Unless you are feeding your baby enormous quantities of yellow or orange foods (carrots, squash, etcetera) then the most likely cause for yellowish skin is jaundice. Please check with your doctor for more information or get a second opinion.
Who said that?
It is said that babies can not eat them too much.
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