Pea Protein Isolate

- Summer Staple Ingredients Trending  - Elisabeth Anderson

Updated: August 18, 2025

Pea protein isolate is quickly becoming a popular ingredient in everything from shakes to meat alternatives. Here’s what you need to know about its nutrition, safety, and uses.

Top Takeaways:

  • Pea protein isolate is made from yellow peas and is commonly found in shakes, bars, vegan dairy, meat substitutes, and pet foods.
  • Pea protein isolate contains all nine essential amino acids but is low in methionine, so it should be part of a balanced diet.
  • The FDA considers pea protein safe, though some people with legume allergies may react despite it not being a labeled allergen.

What is pea protein isolate?

Food manufacturers create pea protein isolate from the yellow pea, Pisum sativum. It is part of the legume family and contains many healthful benefits. A few studies have shown that pea protein may assist in reducing cholesterol levels, lowering blood pressure, improving satiety, and increasing muscle.

Food manufacturers create pea protein isolate by drying peas and then processing them into a protein-rich powder that can be used with a combination of ingredients to provide flavor, texture, and balanced nutrition.

Where can I find pea protein?

You will find this ingredient in many protein-rich products such as protein shakes, protein bars, vegan “dairy” products, and in meat substitutes and blends.

It’s also a common protein added to pet foods, especially grain-free pet foods, as it provides protein and bulk.

What do I need to know about pea protein?

Pea protein is full of nutrients and possesses all 9 necessary amino acids. However, it is low in one essential amino acid, methionine, so pea protein must be part of a balanced diet.

Pea protein is popping up for sale online as supplements, and it’s important to be mindful of the food products you are purchasing online. Many supplements, such as protein powder, sold online, are not adequately tested for purity standards, meaning you may not receive the advertised product.

While the U.S. FDA can issue a recall for a tainted product, it cannot do so until after it has been on the market. So, if you are purchasing pea protein powders, make sure it is from a reputable company or seller.

Is pea protein safe?

In 2016, the FDA accepted pea protein isolate as a GRAS ingredient.

Some food manufacturers have marketed pea protein as being hypoallergenic because it does not contain dairy products and is part of the legume family. However, pea protein can trigger allergic reactions, as reported in the Mediterranean region and in several Asian countries. It has also been reported that in very rare cases people who are allergic to other legume seed-derived foods, such as peanut, have exhibited allergic responses to pea protein.

Pea protein reactions can be especially troubling for allergy sufferers as products containing pea protein are not required to be labeled as an allergen at this point. However, manufacturers will list pea protein as an ingredient in any food product that contains it, so you can still get the facts from the label.

Also worth noting, FDA is investigating the long-term use of grain-free, protein-rich dog foods that often contain pea protein. Scientists are currently conducting research to investigate whether pea protein may contribute to dilated cardiomyopathy cases found in dogs, and the FDA and researchers are exploring all ingredients to ensure the utmost safety for our pets.

Is pea protein an anti-nutrient?

While pea protein and pea protein isolate may contain compounds that some describe as anti-nutrients, there is no evidence to support that pea protein or pea protein isolate causes adverse health outcomes or meaningfully impacts nutrient absorption by our bodies.

The good news.

Knowing the pea protein isolate found in many alternative meat products and meat blends is safe, and part of an overall healthful diet, can make the decision to try a new product easier if we cannot find our favorite products, or if we’re feeling adventurous in the kitchen or on the grill.

If you have any questions about ingredients or ideas for a blog post, please send us an email or submit your idea to us at go.msu.edu/cris-idea.

Citations and Further Reading