Is foremilk less nutritious than hindmilk?

What the evidence says

No, foremilk is not "worse" milk. It's simply a different part of the same feed. At the start of a breastfeeding session, the milk that comes out is thinner and has more water and milk sugar (lactose). This helps quench a baby's thirst.

As the feed continues, the milk becomes creamier and richer in fat. This later milk, called hindmilk, has roughly two to three times more fat than foremilk, and more calories along with it. Protein levels, though, stay fairly similar between the two.

Both parts together give a baby a complete, balanced feed. That's part of why letting a baby finish one breast well before offering the other side matters. It ensures they get both the thirst-quenching early milk and the calorie-rich later milk.

This mostly matters in special situations, like feeding very premature babies in hospital, where some neonatal units specifically collect hindmilk to boost calories for babies who need extra help gaining weight. For a healthy, full-term baby breastfeeding at the breast, there's no need to separate or manage foremilk and hindmilk. Just let your baby feed until they come off on their own.

Canadian sources reviewed do not have a specific guideline page comparing foremilk and hindmilk by name, but general Canadian breastfeeding guidance confirms that breast milk overall has the right balance of nutrients for a baby's needs across a full feed.