Some moms like to express their breast milk - or have to - so that their baby can continue to be breastfed even when they are not around because, for example, they are at work or have other things to do. In these cases, knowing if the breast milk has gone bad, either because it was expressed at work and not stored well, or because it has been in the fridge for too long, is an important step to ensure its quality, and consequently the health of your child.
Steps
Step 1. The fat should separate from the rest of the breast milk and go upwards; it's normal
Step 2. Be aware that it is normal for milk to have a watery consistency and a bluish color
Step 3. Focus on the smell
Preserved breast milk may have a metallic smell or taste a little like soap. These types of smells don't mean the milk has gone bad. They simply reflect the fact that the fat in milk is decreasing. It might seem like a bad smell to you, but don't worry - it's okay.
Your baby can drink milk that smells like this without any problems. However, if she refuses it, try warming it up a bit before putting it in the fridge to block the decrease in fat caused by the enzymes in the milk
Step 4. Be aware that you will instinctively know when the milk has gone bad - it is said that most women have a sixth sense for understanding this
It will have a rancid smell and its taste will be sour, not sweet.
Step 5. Consider how you have stored the milk before throwing it out
If you've stored it in one of the following methods, it should still be good: