Does my baby need cereal or water?
Your baby only needs breast milk for the first six months of life.
Breast milk alone will provide all the nutrition your baby needs. Giving the baby cereal may cause your baby to not want as much as breast milk. This may result in decreasing in your milk supply.
Your breast milk contains everything including water. So even in hot climates, breastfed infants do not need water or any type of juice.
When your baby is ready for other foods other breast milk, the food should be iron rich.
If you are worried that your baby is not eating enough, talk to your baby's doctor.
How about vitamin D?
Vitamin D is needed to build strong bones. All infants and children should get at least 400 International Units (IU) of vitamin D each day. To meet this need, all breastfed infants should be given a vitamin D supplement of 400 International Units (IU) each day. And it should start in the first few days of life.
Sunlight is a good source of vitamin D however it's hard to calculate that how much vitamin D baby gets from it. Too much sun light can be harmful.
You can get Vitamin D supplement from any drug stores or grocery stores. If you are worried or concerned about anything, talk to your baby's doctor.