Babies can't taste salt!

• Experiments suggest that babies can’t taste salt until they are about 4 months old. The delay may be related to the development of kidneys, which start to process sodium at about that age 1. 
• But newborns love sugar solutions--the sweeter, the better. In fact, when babies are given a sugar solution immediately before a painful procedure like a heel prick they cry less.
• Newborns also seem to like the taste of glutamate, which is found in breast milk. By contrast, newborns react negatively to some (but not all) bitter substances.