Is Expired Protein Powder Safe to Use?


Occasionally, I get a call from someone who has just found a bag of protein powder in their cupboard that is past its best before date.

What should they do? Is it still okay to use?

Short answer is: probably.

Use By and Best Before Dates

Food Standards Australia New Zealand (FSANZ) requires that most foods have a date mark that shows how long a food can be kept before it deteriorates or becomes unsafe to eat.

We all know that some foods can ‘go off’. By that we mean that after a period of time a particular food may start to smell bad and not be safe to eat.  Regular milk, for example, has a use by date and foods like this should not be consumed after the use by date as they may pose a health or safety risk. Foods with a use by date cannot be legally sold after that date.


Milk has a 'use by' date.

Milk has a ‘use by’ date.

However, most foods, have a best before date that indicates the period of time the manufacturer believes that the food will retain all its original quality, including taste and flavour. Foods like this are still safe to eat after the best before dates and can be legally sold after this date as long as the retailer believes they are still fit for human consumption.

There are even some foods that have a shelf life of two years or longer do not need to labelled with any dates as they retain their quality over a long time.  Canned foods are an example.

Protein Powders

Dairy protein powders have a shelf life of at least two years from the date of manufacture which suggests that they are pretty stable when stored properly.  They don’t expire and because protein powders are dry powders that are low in fat there’s very little risk of bacterial growth or spoilage.

Protein powder has a 'best before' date.

Protein powder has a ‘best before’ date.

Proper storage is important. A cool dry place,like a pantry or a cupboard, is ideal. In the fridge is too damp and on top of the fridge is not a good place either (hot and humid). It is also best to avoid leaning bags against brick or concrete walls or sitting on a tile or concrete floor.

Is it Safe to Use?

In my opinion, unflavoured protein powders such as those we sell at MyoPure should retain their original quality for at least 4 to 6 months after the best before. If they retain their original color and odour they should still be safe to consume up to a year after the best before. After that I think it’s time to give it up.

The most important thing is to trust your sense of smell and taste. If you’re unsure mix some in water, smell and taste, your senses will let you know.

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