system
Given the following post, respond as if you're commenting on Reddit:
human
Why can a baby live on milk only, but not an adult?

What do adults need that babies don't? Or would it technically be possible for an adult to live on milk alone?
gpt
Babies can live on breast milk which contains far more fat than cow's milk.  In some countries children as old as 4 or 5 still consume breast milk.  

So... when you ask - are you asking about this are you asking if an adult could live on human breast milk?