I inadvertently managed to start a conversation about when to transition from formula to cows milk and it got me thinking that actually the guidelines don't match up.
WHO says breast milk is nutritionally important for a child until 2 years. But for formula fed babies they can transition to cows milk at 12 months. Cows milk is quite clearly worlds apart from human breast milk or we wouldn't bother with formula. Formula is much closer to mimicking the nutritional content of breast milk. So if breastfed babies need breast milk to 2 years why don't formula fed babies also need it to 2 years?