Why throw away unused baby formula (powder) after a month?

What is the reason to throw it away? Is it a loss of nutrients or is it because of of spoilage of the milk used in it or none of the above?


Please don't answer if you're only making a guess. I'd really like to know why. Thanks in advance!Why throw away unused baby formula (powder) after a month?
i honestly didn't think you had to throw it away. Most cans of powder come with a plastic lid so i can't see there being a loss in nutrients. I opened a can of powdered formula when my son was younger and then forgot to pack that can for our camping trip, when i came back 3 weeks later the can was still intact the way we left it, sealed with the plastic lid. I cannot honestly see why someone would throw away good formula, i could see throwing out a can of liquid formula. Its no different than hot chocolate, it comes in a can much like formula and of course you don't drink it all in a month and you still keep it and when you go to use it the next time there is nothing wrong with it.Why throw away unused baby formula (powder) after a month?
dont throw it away, it is a waste of formula.. its because the air supposibly takes away the vitamins and all.. if you get the formula out and put the lid back on it right away then its fine.. when you need to throw it away is when you look at it and it looks weird, smells funny, ect. but i used to use the powder then i switched to the liquid, but the powder that is open i save until the liquid is out and then use that and its fine!
After it is exposed to the air it starts to lose vitamins, which is essential to baby's health. It is not worth the risk to use it.
Go ahead and use it. If it is more than 6 months old and opened, smells or looks funny, then throw it. The recommendations were made by the MARKETING dept. not actual nutritionists or food scientists.