How To Tell If Milk Is Bad?

If you’re wondering how to tell milk is terrible, you’ve come to the right place. There are several warning signs, whether cow’s milk, almond milk, or other dairy products. The most common symptom of spoiled and bad-tasting milk is lumpiness, discoloration, or a bad smell. You should know the shelf life of your dairy products and how long they last.


When it comes to milk, spoiled milk can be challenging to spot. It may be discolored. The color of sour milk will be yellow or brown. Lumps and curdling will also stain it. Clear, bright white milk is usually a sign that it’s spoiled. The milk should be treated as soon as possible. Sourish and expired milk is not suitable for consumption, and you should avoid drinking it until it has passed these tests.

Milk Nutrition Fact


5 Signs Of Bad Milk

Since time immemorial, every Indian household’s magic potion for health and nutrition has been one tall glass of milk. Because of its high quantity of protein, fat, carbs, all known vitamins, and different minerals required for sustaining life and preserving good health, dietitians worldwide refer to milk as a “complete food.” But, as we all know, a spoiled glass of milk is equally bad for your health.

It would simply disturb your stomach and make you want to go to the bathroom now and then. Not to mention the unappealing taste and odor of the milk, which would be a complete mood-killer in and of itself. Before eating, check and double-check the “best before” date marked on the back of the carton or package.

According to scientists, milk should be consumed within three days of its best-before the date. However, in various circumstances, milk can spoil well before the ‘best before date. It is not difficult to distinguish between fresh and stale milk samples, and a few tests can help you differentiate between them. Smell TestThe simplest and most basic test for determining whether or not milk has gone wrong is to smell it. A familiar scent would not be found in a carton of fresh milk. The fundamental characteristic of ruined milk is its unpleasant odor.


1. Smell Test

The primary and the most straightforward test to check whether or not the milk has gone wrong is to smell it. A familiar scent would not be found in a carton of fresh milk, and the fundamental characteristic of ruined milk is an unpleasant odor.

2. Inspect The Consistency And Texture

Examine the texture and consistency. Milk is a clear, thin liquid. It’s a warning that the milk isn’t fresh or safe to drink if it contains lumps or a clear yellowish color rather than pure white. You can also do a simple test to determine the texture of the milk. If your milk starts curling or has a yogurt or cottage cheese texture and consistency, pour some into a glass.

3. Check The Colour

Examine the color. Pure and fresh milk is a bright white color. There’s a reasonable probability your milk isn’t safe to drink if it’s even slightly yellow or pale white. Pour the milk into a transparent glass and examine it against the light to analyze the color further. If the color of your milk isn’t white, it isn’t going well.

4. Check Whether The Milk Was Sitting Out In Room Temperature For Too Long

It’s still two days before it expires. However, it has begun to taste, smell, and appear strange. Are you curious as to why? This could be due to your milk sitting at room temperature for too long. If the milk is left out, ensure it is only at the recommended 39 degrees F. (4 degrees C). If not in use, return the milk to the refrigerator to extend its shelf life.

5. Microwave A Sample

A Sample Is Microwaved A simple microwave test is another easy test you can perform. Put a glass container with part of your milk in the microwave for a minute. Remove the container and examine the milk. Drinking milk containing lumps or unusual texture or color is not safe.

What Does The Term “Expiration Date” Imply?

In the United States, food and drink packaging usually include at least one date, which might have various implications. These dates and definitions can differ amongst labels and aren’t governed by the same rules. The Food Safety and Inspection Service (FSIS) lists the following dates on food and beverage labels:

Use by

This is the latest date by which the maker suggests that consumers use the product to get the best results.

Best if used by

This date refers to a product’s best flavor or quality. This date recommends how long a store should keep the merchandise on display.

Freeze by

This is the optimal date to freeze a product to maintain its quality. These labels have nothing to do with the quality of the food or drink, and all items should be safe after any of these dates if appropriately handled. The FSIS does not enforce product dating, but those who do so must be honest and follow the rules, including displaying a day and a month. The FSIS regulates infant formula because it can be dangerous after expiration.

According to the Food and Drug Administration (FDA) Trusted Source, people in the United States waste nearly one-third of their food each year, amounting to $161 billion, according to the Food and Drug Administration (FDA)Trusted Source. Uncertainty about the meaning of food and drink labels is estimated to account for 20% of that waste.

Except for infant formula, the FDA is working with other federal agencies to standardize “best if used by” to signify the date of optimal quality. The goal is to limit the number of people who throw away edible products that have passed expiration dates.

What Causes Milk To Spoil?

Milk typically contains bacteria like Escherichia coli and Salmonella, which can spoil and make you sick. Bacterial overgrowth that impairs the texture, flavor, and quality of the milk leads to milk spoilage. Psychotropic bacteria that thrive in subfreezing conditions frequently cause milk to deteriorate.

Milk is produced in multiple phases to eliminate microorganisms and extend the product’s shelf life. The United States Department of Agriculture provides recommendations for milk production. Dairy cows will be reared and milked before the milk is stored at 40°F or below and transported for testing and processing. The following steps are involved in milk processing:

Pasteurization is the process of heating milk to kill microorganisms before cooling it again.
Homogenization: An atomizer uniformly distributes fat throughout the milk, preventing it from settling to the top.

Separation For different types of milk, a centrifuge spins the milk to separate the cream before recombining it with varying fat levels.
Other steps may be required, such as additional filtering or ultra-high temperature treatment.

Pasteurization destroys most bacteria in milk, but not all of them, which can continue to thrive after processing. When milk is opened at home, other germs might enter and develop, causing the milk to deteriorate.


One of the most critical signs of spoiled milk is a discolored appearance. In addition to these signs, you can smell milk if you can’t smell it. Ask someone else to sniff it for you if you can’t smell it. If you can’t smell the milk, you can also smell its odor. Sour milk will have a foul odor. It’s essential to avoid this type of milk, and it’s also necessary to avoid contaminated food.

Milk with a sour odor is a good sign that it’s spoiled. It’s also spoiled if it has a bad odor and an unpleasant smell. These are all clues that milk is bad. Don’t drink it if it has a bad smell. If it smells like milk, it’s probably spoiled, and if it has a bad odor, it’s spoiled.