Can muscle milk go bad?

In this brief guide, we are going to answer the question” Can muscle milk go bad?” with an in-depth analysis of the ingredients of muscle milk. Moreover, we are going to highlight the health risks of drinking muscle milk and the shelf life of whey proteins.

Can muscle milk go bad?

Yes, muscle milk can go bad. When muscle milk is freshly expired, it is still good. As long as it is not many months old. When you drink a sip of spoiled milk, it will not cause you any harm. But if you are drinking large amounts of spoiled milk, then it can cause food poisoning. You can also face some other health problems such as vomiting, stomach pain, and diarrhea.

When milk smells and looks ok, it is safe to drink it. When you properly store it in the fridge, you can drink it for up to a week even after passing the label date. It can also be drinkable when you store it properly. In this way, it can be drinkable for up to 2 weeks depending upon the temperature of the fridge.

What is muscle milk?

Muscle milk is known as a nutritional supplement drink. You can find it in supplement stores and also at corner markets. 

Muscle milk contains calcium, sodium caseinate, milk protein isolate, maltodextrin, fructose, potassium citrate, and vitamin-mineral blend. 

Side effects of muscle milk:

Weight gain and insulin resistance:

Muscle milk contains acesulfame potassium and sucralose. Both of these are artificial sweeteners. They interact with bacteria present in the gut and promote weight gain and insulin resistance. They appear in breastmilk and increase the risk of many diseases.

Trigger allergies:

Muscle milk does not contain actual milk but it contains whey and casein proteins which are derived from milk. These proteins can trigger allergic reactions in some people. Many digestive symptoms which people face are related to food allergies.

Tough on the kidneys:

People who are facing kidney problems should always consult their doctor before using muscle milk or any other type of protein supplement. A 10 oz bottle of muscle milk has approximately 18 grams of protein.

Some people with kidney problems need diets with high protein and some people need diets with low protein. In both cases, the intake of sodium, potassium, and phosphorus should be monitored. 

Excess amounts of proteins are metabolized and flushed through kidneys. In this way, muscle milk can overwork the kidneys of people with kidney insufficiency. Kidney patients need to drink additional amounts of water to help flush kidneys with an additional intake of proteins. 


If you are facing some allergic problems, chronic kidney problems, or are concerned about artificial sweeteners consumption, you should use caution while drinking muscle milk. People with health problems should require prescription medication while using muscle milk. Always consult your doctor or dietitian before consumption of muscle milk. While it is a great source of nutrients for people who lack nutrients in their diets. 

Shelf life of protein powder:

Shelf life depends upon how long food retains its optimal quality after production. Protein powder has a shelf life of more than 12 months. It is also safe to use up to 19 months under normal conditions. The conditions should be that humidity level should be 35% and temperature should be 21 degrees celsius.

For the determination of the stability of a product, an accelerated shelf-life test is used. It is a measuring method that is used to determine the stability of a product by storing it under different stressful conditions such as high temperature and humidity levels. 

In another study, observers concluded that whey protein powder has a shelf life of 9 months. Its shelf life would be 9 months if it is stored at 35 degrees celsius. Its shelf life would be at least 18 months when it is stored at room temperature (21 degrees Celsius) and with 45 to 65% humidity. 

Some protein powders contain additives such as maltodextrin, lecithin, and salt which increase their shelf life to 2 years. Under normal conditions, the shelf life of protein powder is 9 to 19 months. 

Is it safe to drink expired protein powder?

Yes, you can drink expired protein powder. As protein powder is a dry substance it has a very low risk of bacterial growth. If protein powder is opened, you can use it from 6 to 8 months even after the expiry date. 

Here, you can find out the health benefits of milk proteins. 


In this brief guide, we answered the question” can muscle milk go bad” with an in-depth analysis of muscle milk ingredients. Moreover, we discussed the health risks of drinking muscle milk.


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