Written by Gavin valve De Walle, MS, RD on January 7, 2020 — medically reviewed through Jillian Kubala, MS, RD, Nutrition

Protein powders are an extremely popular supplement among health-conscious people.

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Still, depending upon how long that tub of protein powder has remained in your kitchen cabinet, you might wonder whether it’s still great or safe to use.

This short article discusses even if it is protein powder expires and if it’s for sure to consume past its expiration date.

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Protein powders sell a practically and reasonably inexpensive method to boost your protein intake.

Though lot attention is focused on protein’s beneficial effect on muscle gain, research continues to unravel other benefits of greater protein intakes, including fat loss, blood sugar stabilization, blood push control, and bone health (1, 2, 3, 4).

Protein powders come indigenous a variety of sources, including:

milk — in the form of whey or caseinsoycollagenpeariceegg white

Products generally contain one source of protein but may also carry out protein native multiple sources to reduce price or change the absorb rate.

For example, some protein powders might contain both fast-digesting whey and also slow-digesting casein protein.

Protein powders likewise include differing levels of various other nutrients, such together fats, carbs, vitamins, and also minerals.

Plus, they typically contain additives, including natural and also artificial flavors, smell protectors and enhancers, and thickening agents to carry out a creamier consistency and mouthfeel.


Protein flour come from a range of animal- and also plant-based sources. They often contain additive to improve and preserve their flavor and texture.

Shelf life usually refers to just how long food retains optimal quality after production.

Supplement manufacturers execute not have to encompass an expiration date on their assets (5).

However, many companies voluntarily administer an expiration or “best by” stamp along with a produced date.

In these cases, it’s up to the manufacturer to support the expiration day of their products with data to show it’s not misleading (5).

Using an sped up shelf-life test, researchers in one study discovered that whey protein powder has actually a shelf life of an ext than 12 month — also up to 19 month under common storage conditions, which are identified as 70°F (21°C) and also 35% humidity (6).

An increased shelf-life test is a an approach of measuring and also estimating the stability of a product by storing it under stressful conditions, such as high temperature and also humidity.

In one more study, researchers concluded that whey protein has a shelf life the 9 months when stored at 95°F (35°C) but at least 18 months as soon as stored in ~ room temperature, or 70°F (21°C) with 45–65% humidity (7).

Whether the said shelf life the whey protein applies to other sources of protein stays unknown, but it’s likely similar if they room stored under the same conditions.

In one of two people case, many protein powders on the industry contain additives that boost shelf life, such as maltodextrin, lecithin, and also salt, enabling for a shelf life around 2 year (8, 9).


Based on the available research, whey protein powder has a shelf life of 9–19 months as soon as stored under typical conditions. Most protein powders contain additives that prolong the shelf life for as much as 2 years.

With the exception of child formula, expiration or use-by days are not indications of safety but quality (10).

Protein powders room low humidity foods, an interpretation they’re less prone to bacterial expansion (11).

While consuming protein powder quickly after that is expiration day is most likely safe if the product has been save properly, protein powders have the right to lose protein content with age.

One study proved that the amino mountain lysine in whey protein decreased from 5.5% to 4.2% in 12 months once stored at 70°F (21°C) with 45–65% humidity (7).

However, the protein powder provided in this examine did not contain any of the additives that many assets on the market contain to expand their shelf life.

It’s also possible for protein powder to go poor before the noted expiration date, specifically if it’s not stored under cool and also dry storage conditions.

For example, one study showed that as soon as whey protein to be stored in ~ 113°F (45°C) for 15 weeks, there was a significant increase in oxidation, which led to the production of various compounds that cause undesirable alters in taste (12).

Oxidation — the reaction the fats v oxygen — increases with warehouse time and damages the high quality of protein powders. High temperatures room conducive to oxidation, through research suggesting that oxidation increases by 10-fold because that every 50°F (10°C) boost (13).

Signs the protein powder has actually gone bad include a rancid smell, bitter taste, transforms in color, or clumping (7).

Similarly to eat spoiled foods, consuming protein powder v one or much more of these indicators — regardless of the expiration date — can make girlfriend sick.

If you notice any indications that her protein powder has actually gone bad, it’s ideal to litter it out.


Protein powder is likely safe come consume soon after its expiration date if there are no indicators that it has gone bad. However, the protein content of protein flour may decline with age.

Protein powders are well-known supplements that come from a range of animal- and also plant-based sources.

Though research suggests that whey protein has actually a shelf life the 9–19 months, many protein flour manufacturers perform an expiration date of 2 year after production, i m sorry is most likely made feasible due to additive that extend shelf life.

See more: Which Of The Following Would Cause An Increase In The Supply Of Cheese?

Consuming protein quickly after the expiration date is likely safe if there space no indicators that it has actually gone bad, which incorporate a rancid smell, bitterness taste, changes in color, or clumping.