As a parent, you are advised by pediatricians and other moms not to include salt and sugar to baby's food before the baby turns one year.
The reason is that most of the newborn taste preferences for sugar and salt are natural. As many of us will agree that sugar and salt enhance the flavor and make the food tastier. Excess consumption of both salt and sugar may lead to serious health issues in both the adults and babies. Babies do have a delicate system if you provide salty and sugar foods more than they required it may cause health issues to them.
Before six months old babies get all the required salt from breastmilk. Approximately in an average a 6 months, the baby needs less than 1 gram of salt a day and they do not need sugar in their diet as it can meet through food rich in carbohydrate. As babies, their kidneys are too delicate to deal with more salt than the required amount. Breastmilk and other food products naturally contain salt and sugar. Fruits vegetables, lentils, grains, and eggs contain natural salt and sugar, while you are feeding your babies with these foods there is no need to add extra salt to in baby's food until they turn one.
Excess intake of sugar may reduce immunity in babies. Consuming more salt may impair kidney function as babies cannot eliminate the high level of salt from the blood. Whether it is fruit puree or pressure cooked rice with dal and veggies it's better to avoid adding salt and sugar in foods that you cook for your baby.