Tired mothers will often come to me on confidence and say I have been told that if I top my baby off with formula, particularly that last feed at night, my baby will sleep longer. First of all, your baby may sleep longer so that makes it really enticing. I understand. But I want to give you informed consent if you will. What you need to understand when you combine formula with human milk, you are diminishing the benefits of human milk because the gut is different. When you give formula to a baby, their pH changes from an acid to a basic content. And the harmful bacteria thrive and grow in a basic environment. So we want to keep the gut acid if we can. And the second concern is a baby´s gut until they are about six months old, the gut wall is what we call open. There are tiny little openings between the cell walls, which allow harmful pathogens and allergens to cross over into the bloodstream. If you want the full benefit of human milk and all the wonderful things that it provides a baby, you want to keep their gut pure if you will. I know it is hard to get up but you are giving your baby an amazing gift that you cannot get back so it is really worth it to struggle at night and get up and feed your baby. It is short term and you are creating an amazingly healthy person for life.