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ONNIT Whey Protein Review (2023 Upd.) Is it Legit Or a Scam?

Tyler Sellers
Published by Tyler Sellers
Fact checked by Donald Christman, BHSc FACT CHECKED
Last updated: May 2, 2023
We personally test every product featured in our reviews and guides. By ordering products anonymously and getting a group of independent testers, we are able to get first-hand experience and provide data-driven recommendations. Learn more.

We have recently received several 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 thoroughly researched all the ingredients and overall benefits.

Let’s start with an introduction.

What is ONNIT Whey Protein?

Close up image of ONNIT Whey Protein

ONNIT Whey Protein is a dietary supplement that can aid muscle growth and recovery. This protein shake contains grass-fed whey isolate that preserves a higher quality amino acid profile.

Each scoop delivers 20 grams of protein per serving, which might seem 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

Overall Score 3.8


Supplement Facts of ONNIT Whey Protein

This section will help you understand why the company chose a specific whey type and the other ingredients.

Main Ingredient: Grass-Fed Whey Isolate

ONNIT grass-fed whey protein powder uses whey isolate sourced from grass-fed cows from New Zealand. Several studies have proven that grass-fed herds of cattle are healthier, and healthier cows produce higher quality milk.

Another important thing about this product is that it’s not a whey concentrate, but an isolate.

Some studies have shown the benefits of an isolate over a concentrate whey protein, which are:

  • Higher concentration of protein
  • Less fat and carbs
  • Less lactose (suitable for people with dairy intolerance)

It also doesn’t contain gluten, sugar, and soy, making it suitable for most athletes. 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 works by delivering a highly concentrated dose of protein that the body needs to repair and build new muscle tissue.

How to use

The suggested use is:

  1. Mix it with 8 ounces (240ml) of water
  2. Drink immediately after finishing a workout

Also, you might want to invest in a good shaker, and the importance of drinking it immediately lies in the fact that after a workout, your muscles start craving amino acids within half an hour.

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

“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.” -


Pros and Cons

Line of ONNIT Protein

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

We also couldn’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 we recommend blending it for the best texture.

Also, a few of our clients reported some bloating after consuming it.



ONNIT Whey Protein

Overall Score 3.8
  • Provides grass-fed whey isolate for higher purity
  • May increase your protein intake faster than other supplements
  • Higher protein content, with less fats and carbs
  • The chocolate flavor can taste artificial to some users.
  • You might need to blend it to get a smooth shake
  • It could cause some bloating on a sensitive stomach

Side Effects

stomach pain

In a protein powder comparison chart, we found that ONNIT grass-fed whey protein powder is a safe protein powder overall, and we noticed very few comments about side effects.

The only complaint we got is from clients with more sensitive stomachs. They reported some bloating and gassiness for half an hour after taking it.

The solution for this can be lowering your dosage and drinking it slowly.

Anyone with lactose intolerance should also be careful, but the isolation process removes most of the lactose, so it should work 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


How Much Does It Cost?

ONNIT Whey Protein costs $59.95 for one bottle (780g). If you subscribe to their website, you get 20% off, which is $47.96. Shipping is free for orders over $150, but it’s only available in the U.S.

By purchasing this product from the official website, you receive 47 points that you can later use as a discount on your future purchases.

Keep in mind that all pricing and shipping information was collected at the time of writing this review so that some changes could be possible.

Regardless, only buy from their website to ensure legitimacy. As it is, a lot of fake and expired products litter the internet, so it's best to avoid these platforms even if they offer ONNIT Whey Protein at a much lower price.

Whey Protein Alternatives

With so many whey protein options available, we wanted to look at how ONNIT stacked up to three top competitors. Here’s what we found.

Transparent Labs Whey Protein

In my years as a fitness coach, I have learned to read labels closely, and what I appreciate about Transparent Labs Whey Protein is that the ingredient list is short.

Compared to ONNIT’s smaller scoop (26 g) and amount of protein (20 g), one 32.96-gram scoop of Transparent Labs protein powder will give you 28 grams of protein with no added sugars or artificial flavors, coloring, and preservatives.

Our test group consensus was that the amount of protein was effective for post-workout muscle repair and recovery. The powder mixes well, and the chocolate and vanilla flavors taste delicious.

The price is similar for ONNIT and Transparent Labs whey proteins, with both official websites giving discounts for participating in their respective, subscribe and save programs.

Optimum Nutrition Gold Standard

One thing that stood out almost immediately when purchasing whey protein for our testing was the number of flavor options offered by Optimum Nutrition. For a level playing field, we ordered the standard chocolate and vanilla because those are the only two options from ONNIT.

I read several online reviews that stated the protein mixes up clumpy. However, this is not something other than what our test group users or I experienced using a standard shaker bottle.

The one-scoop serving of Optimum Nutrition (31 g) is a little larger than ONNIT’s 26-gram scoop. Optimum Nutrition will get you 24 grams of protein with 130 calories and 2 grams of sugar, compared to ONNIT, which brings you 20 grams of protein with 110 calories and no sugar.

I was disappointed that Optimum Nutrition’s whey protein contains artificial flavors; however, our test group consensus was that the chocolate and vanilla flavors were tasty with no adverse effects.

Dymatize ISO100 Hydrolyzed Whey Protein

If you decide on a package of Dymatize ISO100, you will get 25 grams of protein with no added sugars and 120 calories in each 30-gram scoop.

What I like about Dymatize ISO100 is unlike ONNIT, which added 5.5. Grams of BCAAs, including 2.7 grams of L-leucine in each serving. I noticed decreased muscle fatigue and soreness after workouts when drinking a Dymatize protein shake.

Again for our testing, we ordered the chocolate and vanilla flavors which mixed very well. Some in our group thought the flavors were a bit bland, and some were interested in trying the birthday cake or cookies and cream flavors.

Overall, Dymatize offers excellent value with a price point similar to ONNIT, but I did notice the price on Amazon was flavor dependent.


Is ONNIT Whey Protein Gluten-Free?

Yes, ONNIT Whey Protein is gluten-free. It’s also soy and sugar-free, and dairy processing removes most 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 has some sweeteners, they are sourced naturally from monk fruit and stevia.

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.

In our opinion, Transparent Labs Whey offers all the same, if not even more benefits than the ONNIT one. One thing that people find essential is the flavor range, which is much bigger with Transparent Labs.

We also like that it provides a higher dose of protein than ONNIT Whey. Also,  you’ll find that the company offers some great bulk discounts as well.

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

We Recommend This Instead

Transparent Labs Whey Protein

Transparent Labs Grass Fed Whey protein product
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
  • Get the BEST PRICE until the end of June
  • May have issues with packaging and shipping integrity
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3 thoughts on “ONNIT Whey Protein Review:
Read This Before Buying

  1. Thanks for this honest review! Definitely helped.

  2. I appreciate ONNIT’s focus on non-GMO foods in their whey protein. Haven’t tried it yet, but curious about its effectiveness.

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