Breast milk too less , baby is 16 days old and entirely formula fed is it safe?

Yes: while breast milk is the ideal form of nutrition for your baby, formula contains all of the nutrition he needs to grow and thrive.

YES: Breast milk has beneficial components that cannot be produced in a formula,however modern formulas are safe and useful when needed. Formulas are patterned to mimic all the nutrition in breast milk and must have a minimum amount of nutrients specified by the FDA.