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What does bad breast milk smell like?

Understanding the Smell of Bad Breast Milk
Breast milk is often described as having a sweet, mild scent, but there are instances when it can develop an unpleasant odor. Understanding what constitutes “bad” breast milk is crucial for nursing mothers and caregivers, as it can indicate spoilage or other issues.
Characteristics of Bad Breast Milk
When breast milk goes bad, it typically exhibits a sour or rancid odor. This change in smell can be alarming for mothers who are unsure whether their milk is still safe for their babies. The sour smell is often a result of bacterial growth or the breakdown of fats in the milk, which can occur if the milk has been improperly stored or is past its expiration date.
In some cases, breast milk may also take on a soapy smell. This can happen due to the presence of lipase, an enzyme that breaks down fats. While lipase is a natural component of breast milk, excessive activity can lead to a soapy odor, which might be off-putting but does not necessarily indicate that the milk is spoiled.
Factors Influencing the Smell
Several factors can influence the smell of breast milk, including the mother’s diet, medications, and the storage conditions of the milk. For instance, certain foods like garlic or spices can impart a stronger scent to the milk, while medications may alter its smell as well. Additionally, breast milk that has been stored for an extended period, especially in the freezer, may develop off odors due to oxidation or bacterial contamination.
What to Do If Breast Milk Smells Bad
If a mother notices that her breast milk has developed a sour or rancid smell, it is advisable to err on the side of caution. Spoiled milk should not be given to a baby, as it can lead to gastrointestinal issues or other health concerns. Mothers are encouraged to taste a small amount of the milk if they are unsure; if it tastes off, it is best to discard it.
In conclusion, while breast milk is generally safe and nutritious, changes in its smell can indicate spoilage. Recognizing the signs of bad breast milk—such as a sour or rancid odor—can help ensure that infants receive the best possible nutrition.

What are the early signs of milk going bad?

How to Tell If Milk Is Bad

  • Texture/Color: Fresh milk is smooth, thin, and white. Spoiled milk may be lumpy, thick, and/or slightly yellow.
  • Odor: Sour milk smells, well, sour.
  • Taste: If your milk looks and smells unpleasant, please don’t taste it.
  • Spoiled milk can cause:

How to tell the difference between high lipase milk and spoiled milk?

High lipase milk has an odor that some people describe as metallic, soapy, or even fishy. The taste might be very different from the smell, or it might also taste bad depending on the severity. If the milk smells rancid or spoiled, that might be a different problem.

What does foul milk smell like?

When milk begins to spoil, it develops an unpleasant, rancid odor. The scent is hard to miss and gets stronger with time. The taste also begins to change, as the natural sweetness of fresh milk is quickly replaced by a somewhat acidic or sour flavor.

What is the 5 5 5 rule for breast milk?

Something I recommend to moms is the 5-5-5 rule. Try and use milk within five hours at room temperature, five days in the fridge, and by five months in the freezer.

How do you know when breast milk is bad?

Human breast milk can spoil just like any other kind of milk. This leads to a sharp, sour smell and flavor. There’s no way to save spoiled milk. You should be able to tell it’s spoiled by tasting a sip of it yourself.

What happens if babies drink bad breast milk?

Can babies get sick from old breast milk? If your baby has had spoiled breast milk, they’ll likely let you know. They may throw up, or have an upset stomach, diarrhea or fever. It’s important to call your pediatrician if you think your baby may be sick from having spoiled breast milk.

What does milk smell like when bad?

Expiration dates are poor indicators of whether milk is safe to consume. The smell and appearance of the milk are clearer signs of how safe the milk is for consumption. Spoiled milk will produce a sour smell as the bacteria produce lactic acid. The smell will intensify after the milk becomes unsafe for consumption.

What does high lipase breast milk smell like?

The most notable signs of high lipase milk are changes in taste and smell. You might notice your milk having a scent or taste similar to metallic, vomit, eggs, soap, or fishy. The appearance of the milk might also change, though this isn’t always the case.

What is the bad smell in breast milk?

Your milk may have excess lipase in it, which can cause stored breastmilk to smell sour or soapy. Lipase is a beneficial enzyme found in breast milk that helps break down milk fat. If your breastmilk has excess lipase, the longer the milk is stored, the stronger the smell becomes.

What does spoiled breastmilk smell like?

If your milk smells “sour” or “rancid” this can be from oxidation. These changes may occur shortly after the milk is expressed, or it may occur after the expressed milk is frozen and then defrosted.

Natasha Lunn

Tash is an IBCLC and Business Coach helping fellow IBCLCs create fun, profitable businesses that are more than just an expensive hobby. Before becoming an IBCLC and starting her private practice - The Boobala, Tash graduated as an Osteopath in 2008 and has been in Private Practice in South West Sydney. She was also a volunteer Breastfeeding Counsellor and Community Educator with the Australian Breastfeeding Association for 6 years. Through her business, Your Lactation Biz, Tash coaches and creates products to help new and seasoned IBCLCs build businesses that suit their personality and lifestyle.

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