How Long Does Protein Shake Last At Room Temperature

What is the shelf life of a protein shake? How long does it take before going bad when left untouched at room temperature? Are there signs that it’s going bad? All these and more are questions you might have asked yourself when you probably made a protein shake and forgot about it.

Well, not to worry. These questions and more would be answered in this article. So without any more delay, let’s get right into it!

What is the Shelf Life of my Protein Shake at Room Temperature?

If you forgot about your unrefrigerated protein shake and cannot access it at the moment, chances are you are worried about it going bad. So what happens when protein shakes are kept at room temperature?

Well, unrefrigerated protein shakes at room temperature can last about two hours before finally succumbing to spoilage and becoming unfit for consumption.

How Long Does Protein Shake Last
How Long Does Protein Shake Last

Hence, while the gratifying thought of preparing a protein shake just in time for your gym session and drinking it immediately is a great move, you would be overdoing it by thinking you could prepare it the night before and still enjoy it the following morning.

To ensure optimal freshness and safeguard your well-being, it is important to take your protein shake immediately after preparation or extend its vitality by storing it in a refrigerator. By simply heeding this advice, you can unlock the full potential of your protein shake, maximising its benefits while preserving your health.

What makes Protein Shakes go Bad

Protein shakes, like many food items, have a propensity to deteriorate very quickly. Improper storage can exacerbate this process, making the situation even less desirable.

The crucial factor at play is the protein powder itself. In general, plant-based protein supplements, except for soy-based variants, tend to outlast their counterparts. Additionally, a blend of multiple protein sources often imparts greater stability compared to whey protein supplements.

Relevant Post: Best Blender for Protein Shakes with Ice

However, the true determinant of a protein shake’s longevity lies in its ingredients. Incorporating acidic fruits, such as blueberries, introduces a time-sensitive element. In such cases, consuming the protein shake immediately after mixing becomes imperative. If not, you may not like what comes after if you drink it hours after preparation.

To ensure that your protein shake lasts much longer, ensure that you take proper care by storing it in a refrigerator. This way, the protein shake would last much longer—about 72 hours, tops.

That Your Protein Shake

To ensure the longevity of your protein shake, it is advisable to store it properly and consider the nature of the ingredients used. By being mindful of these factors, you can savour your protein shake without worrying about it succumbing to an unfavourable fate.

Signs That Your Protein Shake Has Gone Bad

If you are a fitness enthusiast or someone looking to supplement his/her diet with extra protein,  protein shakes should be one of your favourite or most popular choices. However, it is essential to ensure that your protein shake is fresh and safe before consumption. Here are a few signs that indicate your protein shake may have gone bad.

1. Unpleasant Odour

One of the first indicators that your protein shake has gone bad is a foul smell. If you open the container and notice a strong, rancid odour, it’s likely time to toss it in the bin. Fresh protein shakes should have a mild and neutral scent, So trust your nose on this one!

2. Strange Texture

When protein shakes spoil, they can develop clumps or a thick, slimy consistency. If you find lumps or an unusual texture when mixing your shake, it’s best to take caution and discard it. Consuming spoiled protein shakes can lead to digestive issues.

3. Off-Taste

Fresh protein shakes usually have a pleasant and mild flavour. However, if you take a sip and notice a sour or bitter taste, it’s a sign that something is off. A spoiled protein shake can have a noticeably different taste, so trust your taste buds to determine its quality.

4. Mould or Discoloration

Visual cues can also indicate spoilage. If you spot any mould growth or notice a change in colour, such as a darkening or the presence of greenish patches, it’s a clear indication that your protein shake has expired. Avoid consuming it to prevent potential health issues.

How to Stop Your Protein Shake from Going Bad

Protein shakes are a convenient and effective way to supplement your diet with extra protein. To maximise their benefits, it’s crucial to ensure that your protein shakes stay fresh and don’t go bad. Here are some simple tips to help you keep your protein shake fresh and delicious.

1. Check the Expiration Date

Always check the expiration date before purchasing protein powder or pre-made shakes. Choose products with a longer shelf life to allow for more time before potential spoilage.

2. Store in a Cool and Dry Place

Proper storage is key to preserving the quality of your protein shake. Keep it in a cool and dry place away from direct sunlight or heat sources.

3. Use Clean and Dry Containers

When preparing your protein shake, ensure that the container and utensils you use are clean and dry. Moisture and residue can promote bacterial growth and cause spoilage.

4. Seal the Container Properly

After opening your protein powder or preparing a shake, seal the container tightly to prevent exposure to air. Oxygen can contribute to the oxidation and spoilage of the powder.

5. Refrigerate if Necessary

If you have a premade protein shake that you won’t consume immediately, refrigerate it to slow down bacterial growth. Remember to check the product label for specific storage instructions.


It is best to enjoy your protein shake within 2 hours of preparation or store it in the refrigerator in order to maintain its freshness and quality, which are crucial for both taste and health reasons. If you notice any of the mentioned signs, such as a foul odour, strange texture, off-taste, or visible mould, it’s best to discard the protein shake and make a fresh one. Remember, consuming a spoiled protein shake can lead to digestive discomfort and potential health risks. By following the simple steps above, you can extend the freshness and quality of your protein shake.

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