Earlier quoted context omitted.
For infants this is not food safe. The powder should be mixed with water that is at least 70C to kill bacteria that might be present in the powder. For older babies (6+) then maybe not so important. In the weaning period when I took over with a night bottle and the wife shut down her boobs I would just sleep with a pre-mixed (not from powder) formula pack next to my body. It would be more or less body temperature and…
This is not what the CDC says. It says you may want to take precautions in some cases, such as with a premature infant. https://www.cdc.gov/nutrition/InfantandToddlerNutrition/form... Edit: This also seems like a recent development. My children are grown. https://foodpoisoningbulletin.com/2022/timeline-chronobacter...
The NHS in the UK for example, says to do so (under "Reducing the risk of infection"):
https://www.nhs.uk/conditions/baby/breastfeeding-and-bottle-...
However some, in particular Emily Oster, argue that the risk is negligible and that having an overly complicated set of steps for tired parents to follow is counter-productive:
From my understanding the current general advice from public health authorities is to use 70C/160F water.