While soybean powder drink is generally safe for adults, it is not recommended as a replacement for breast milk or infant formula for infants under 6 months of age. Infant formula and breast milk provide specific nutrients that are necessary for a baby's growth and development. However, for older infants and toddlers, instant soya milk can be a suitable alternative to cow's milk or other dairy products. It is important to note that parents should consult with their child's pediatrician before introducing soy milk or any other new food to their infant's diet.