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How Long Does a Protein Shake Last? Does It Go Bad?

Protein shakes have become increasingly popular over the years, especially among fitness enthusiasts. They are convenient, time-saving, and easy to prepare.

However, many people wonder how long their protein shake will last and if it will go bad.

In this article, we will explore how long protein shakes last, their shelf life, and how to store them properly.

We will provide all the necessary information to help you enjoy your protein shake without worrying about spoilage.

What is a Protein Shake?

A protein shake is a drink that contains a high concentration of protein. Protein is essential for building and repairing tissues, maintaining fluid balance, and aiding in the production of enzymes, hormones, and other important molecules.

Protein shakes usually contain whey, casein, or soy protein as their main ingredient. In addition to protein, they may also contain vitamins, minerals, and other macronutrients such as carbohydrates and fats.

How Long Does a Protein Shake Last?

The shelf life of a protein shake depends on a variety of factors, including the type of protein used, the other ingredients in the shake, and how it is stored.

Most commercially available protein shakes come with an expiration date printed on the package. However, the actual shelf life of the shake may be shorter than the date indicated if it is not stored correctly.

Protein shakes that are only made with water and protein powder tend to have a shorter shelf life than those made with milk or other liquids. Typically, a protein shake made with only water and powder will last for 1-2 days in the refrigerator.

On the other hand, if a protein shake is made with milk or other liquids, it will last longer. A protein shake with milk or other liquids can last for 5-7 days in the refrigerator. If you need to keep it longer, it is best to freeze it, and it should last up to 3 months.

Does a Protein Shake Go Bad?

Protein shakes can go bad if they are not stored correctly or if they are consumed after their expiration date. Consuming spoiled protein shakes can lead to food poisoning, upset stomach, or other health problems.

You can easily tell if a protein shake has gone bad by examining its smell, texture, and taste. If it has a sour or rancid smell or taste, it is an indication that the shake has gone bad.

The texture of the shake can also give away signs of spoilage. If the shake has separated or has a thick layer on top, it is an indicator that it has gone bad.

How to Store Protein Shakes?

Proper storage is essential to increase the shelf life of a protein shake. Here are some tips to help you store your protein shake correctly:

  • Refrigeration: Always store protein shakes in the refrigerator. Make sure the temperature is below 40°F (4°C). Do not leave a protein shake at room temperature for more than 2 hours.
  • Freezing: You can freeze your protein shake if you need to store it for a longer period. Make sure to transfer it to an airtight container before freezing. Additionally, label the container with the date as a reminder of when to use it.
  • Airtight Container: Always store protein powder and prepared shakes in an airtight container to keep out moisture, air, and bacteria.
  • Avoid Light: Protein powder and prepared shakes should be kept away from direct sunlight. Sunlight exposure can lead to a decrease in quality, taste, and texture.
  • Avoid Mixing: Do not mix protein powder with water or other liquids until you are ready to consume it. Mixing protein powder with a liquid in advance can cause it to spoil faster.

How to Tell if a Protein Shake Has Gone Bad

It is vital to check if your protein shake has spoiled before consuming it. Here are some ways to tell if your shake has gone bad:

  • Smell: If there is a sour or rancid odor coming from the shake, it is a sign that it has gone bad.
  • Texture: If the shake has thickened or separated, it is an indication that it has gone bad.
  • Taste: If the shake tastes sour, rancid, or stale, it is a sign that it has gone bad.

It is important to note that consuming a bad protein shake can pose a health risk. Therefore, if you are in doubt, always discard the shake.


Protein shakes are a great way to supplement your daily protein intake, and they provide a quick and convenient meal option for people on-the-go. However, it is crucial to store them correctly and monitor their condition to ensure they do not go bad.

In conclusion, a protein shake made with milk or other liquids can last for 5-7 days in the refrigerator. A shake made with only water and protein powder will last for 1-2 days in the refrigerator.

Proper storage is key to increase the shelf life of a protein shake. Always store them in an airtight container in the fridge or freezer. Make sure to check for signs of spoilage such as smell, texture, and taste before consuming. Ultimately, the health benefits of a fresh protein shake outweigh the risks of consuming a spoiled one.

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Jenny has always been passionate about cooking, and she uses her platform to share her joy of food with others. Her recipes are easy to follow, and she loves giving tips and tricks to help others create their own unique culinary creations.