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ONNIT Whey Protein Review (2021 Upd.) Is it Legit Or a Scam?

Tyler Sellers
Published by Tyler Sellers
Fact checked by Donald Christman, BHSc FACT CHECKED
Last updated: November 1, 2021

Post-workout protein shakes are probably one of the most important supplements that any athlete will rely on.

And we’ve recently received a number of questions about the ONNIT grass-fed whey protein powder from clients and readers.

While ONNIT has a good track record of creating quality supplements, we wanted to make sure that we fully research all the ingredients and overall benefits.

Let’s start with an introduction.

What is ONNIT Whey Protein?

ONNIT Whey Protein

ONNIT Whey Protein is a dietary supplement that claims to use the highest quality dairy sources to create an exercise recovery shake.

The company claims that the processing of the grass-fed whey isolate preserves a higher quality of amino acid profile to better aid in muscle recovery and growth.

Each scoop delivers 20 grams of protein per serving, which might seem a lot lower than other popular products.

But because it’s sourced from pasture-raised New Zealand dairy cows, it should provide a higher purity whey than most of the cheap supplements you’ll find in sports nutrition stores.


ONNIT Whey Protein

ONNIT Whey Protein

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Supplement Facts of ONNIT Whey Protein

This should be a short enough section, but it’s important that you understand why the company chose a specific type of whey and what the other ingredients are.

Main Ingredient: Grass-Fed Whey Isolate

ONNIT grass-fed whey protein powder uses whey isolate sourced from grass-fed cows.

Several studies have proven that grass-fed herds of cattle are healthier, and healthier cows produce higher quality milk [1].

The other important thing to keep in mind is that it’s not a whey concentrate but rather an isolate. This involves more processing to produce a higher concentration of protein with less fat and carbs.

It also contains less lactose, which could make it suitable for people with a dairy intolerance.

There are also a few ingredients to make up the powder and flavor that you might want to check for any allergies.

Other Ingredients

  • Sunflower Oil
  • Dried Cream Extract
  • Maltodextrin
  • Medium Chain Triglyceride Oil
  • Digestive Enzymes
  • Natural Flavors
  • Stevia Leaf Extract
  • Monk Fruit Extract
  • Organic Rice Hull Concentrate
  • Lactobacillus Acidophilus

The final thing I should point out is that it’s gluten, sugar, and soy-free nutrition supplement that should suit most athletes.

How Does It Work?

protein shake making

ONNIT grass-fed whey protein powder may deliver a highly concentrated dose of protein that the body needs to repair and build new muscle tissue.

The suggested use is to mix it with 8 ounces of water, and you might want to invest in a good shaker. You should then drink it immediately after you finish your workout, as your muscles will start to crave amino acids within half an hour.

“With grass-fed milk, for example, you'll get more omega-3 fatty acids (great for improving heart health and reducing inflammation), more vitamin D (great for boosting your mood), double the beta carotene (great for firming up your immune system) and an extra dose of conjugated linoleic acid, or "CLA" (great for aiding in weight loss), according to research.” -

Whey isolate may also have the advantage of being highly digestible, so you should be in a position to feed your muscles within 20 minutes [2].


Pros and Cons

ONNIT Whey Protein

ONNIT grass-fed whey isolate is available in Mexican chocolate and vanilla flavor options, and users seem to like the vanilla product the most.

We also wouldn’t deny that it’s a good quality of protein that your body should be able to process quickly.

The downsides we saw are that it’s not the smoothest consistency out of a shaker, so you might need to blend it.

And a few people we talked to said that they felt quite bloated for a while after drinking it.


ONNIT Whey Protein

ONNIT Whey Protein

We earn a commission if you click this link and make a purchase at no additional cost to you.
  • Provides grass-fed whey isolate for higher purity
  • May Increase your protein intake faster than other supplements
  • The chocolate flavor is a bit fake tasting
  • You might need to blend it to get a really smooth shake
  • Could cause some bloating on a sensitive stomach

Side Effects

stomach pain

ONNIT grass-fed whey protein powder is overall a safe protein powder, and we noted very few comments about side effects.

The only complaint we saw is that people with a sensitive stomach said that it made them feel bloated and gassy for about half an hour.

It might possibly be down to a higher dose, and you could try drinking it a bit more slowly.

Anyone with lactose intolerance should also be careful, but the isolation process does remove most of the lactose, so it might work just fine.

Customer Reviews

whey protein review

We found two honest review comments that we liked, and they seemed to confirm our own testing results.

Michael has been using this grass-fed whey isolate for 3 months and has noted a good improvement in muscle function and bulking. It seems to be his go-to post-workout product right now.  - Michael from Las Vegas

He wasn’t a big fan of the flavor or consistency, but he did say that it worked well for muscle building support. Ultimately, he switched to another product with a more pleasant consistency. - Steve from Oklahoma


Is Onnit Whey Protein Gluten-Free?

Yes, ONNIT Whey Protein is gluten-free. It’s also soy and sugar-free, and the dairy processing also removes the majority of the lactose. This should make it a good option for people with common food allergies.

Does Onnit Whey Protein Contain Artificial Ingredients?

No, ONNIT Whey Protein doesn’t contain artificial ingredients. While it does contain some sweeteners, these are sourced naturally from monk fruit.

Should You Buy ONNIT Grass Fed Whey?

As much as we wanted to make this one of our top recommendations, it didn’t quite live up to our favorite Transparent Labs option.

It provides all the same benefits and comes in a much better range of tasty flavors. We also like that it provides a higher dose, and you’ll find some great bulk discounts as well.

Order yours today and let us know how well it works for your diet.

Our #1 Recommendation

Transparent Labs Whey Protein

Transparent Labs Whey Protein
Ingredient quality
Overall Score 4.8
  • 24 grams of protein per serving
  • Contains no artificial sweeteners or additives
  • Gluten and GMO-free
  • Sourced from grass-fed cows
  • May have issues with packaging and shipping integrity

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