Infants can pass white stools in response to various factors such as
Bile retention or diseases of biliary atresia that prevent bile from flowing into the intestine, making the stool white in colour.
eating a diet that is too greasy and fails to absorb the fat in the food, producing fatty acids that combine with the minerals calcium and magnesium in the food to form fatty soap, making the stool greyish white in colour
The digestive system is not yet fully functional and an inappropriate diet, especially when too much protein is consumed, can cause indigestion, which can be accompanied by temporary closure of the biliary system and reduced bile secretion, resulting in white stools.