7 Best Protein Powders WITHOUT Heavy Metals (Lab Tested) - FeastGood.com (2024)

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One big area of concern for consumers has been the discovery of heavy metals like lead and cadmium in foods and health products, like whey protein powder.

As such, the pressure is on companies to be open and transparent with their ingredient lists and testing results to provide you with reassurance that the products you are consuming are safe and free from harmful ingredients.

Below, I’ll dive into why excessive heavy metal consumption is a problem, which ones are the most problematic, and the top 7 protein powders without heavy metals.

The Problem with Excessive Heavy Metals

Which metals are of most concern?

While hearing that heavy metals are in our products might sound terrible, certain metals are essential for human survival. Metals like iron, zinc, and copper, for instance, are all essential for the body to function.

Other metals like arsenic, cadmium, lead, and mercury do not play biological roles in our bodies. They do still enter our bodies, however, due to their presence in the environment and health products like foods, supplements, and feminine hygiene products.

In trace amounts, consuming these non-biological metals is not harmful to the body. Our bodies have ways of dealing with metals naturally. For instance, certain metals like lead and arsenic can bind to proteins and be excreted through urine or bile.

The problem with a high amount of metal consumption, though, is that the body is not very efficient at removing these metals, so if you are unknowingly consuming high amounts, then these metal concentrations can build up in the body and cause toxicity.

The key metals of concern when it comes to protein powders are Lead, Arsenic, Cadmium, and Mercury.

How big of a problem are heavy metals really?

There is much fear-mongering online with clickbait articles and social media posts. It can also be really confusing to decipher the research on this topic.

For example, reading that a mercury concentration level was 9.41 ± 0.295 ng g⁻¹ means nothing to me without spending a lot of time digging into what acceptable concentrations are.

So I spent the time digging…

When I dove into the literature, what I found was actually really reassuring.

Recent research shows that even with regular supplement use, the consumption of heavy metals is well below the accepted intake levels. In other words, even if you use multiple supplements daily, you are still most likely not at risk for heavy metal toxicity from these products.

One research model even calculated the heavy metal content, assuming that individuals are consuming three scoops of protein powder per day and still found heavy metal intake to fall into an acceptable range.

I personally fall into this category since I regularly use 2-3 scoops of whey protein daily.

Approximately 80% of supplement users report using whey protein supplements 3 to 6 times per week.

All this to say, it is very unlikely that you will achieve toxic levels of heavy metals through your protein powder consumption alone.

However, it is still a great idea to know which brands are taking the extra steps to ensure your safety.

When you factor in other ways we can intake heavy metals like beauty/haircare products, foods, and environmental pollutants; it is important to be aware of these sources to minimize your overall heavy metal intake.

Medical Disclaimer: The material presented in this article aims to offer informational insights. It should not be perceived as medical guidance. The views and writings are not designed for diagnosing, preventing, or treating health issues. Always consult with your physician prior to starting any new dietary or supplement routine.

Organizations That Test for Heavy Metals in Protein Powder

Generally, when doing supplement reviews and ratings, I use a wide variety of criteria like taste, texture, mixability, ease of ordering, protein percentage of calories, and ingredient label transparency, among many others.

While these factors should influence your overall ratings for protein powders, my focus in this article was to find protein powders that have been tested and certified by high-quality third-party testing facilities for heavy metals.

Here are the resources and organizations I used to choose a list of protein powders:

Note: Each of these organizations has pros and cons, which is why we need to use all of them to come up with a complete list of products, not just rely on one or the other.

1. LabDoor

My first resource was LabDoor, an independent third party that tests their protein powders for heavy metals (as well as actual protein content and other potential contaminants).

They show the protein powders that have passed testing and publicly display all testing results on their website.

The only downside is that they only show the products that they have certified and approved, so you cannot see if your specific product was tested and failed.

Key protein powders identified on Labdoor are:

• Legion Whey+
• MyProtein Impact Whey
• Transparent Labs Grass-Fed Whey
  • Note: this certification expired in Sept 2024. When I look at their previous years, the testing was updated approximately every 13 months. I am waiting to see if its updated 2024 results come through

2. Consumer Lab

My second resource was Consumer Lab, another third-party independent testing organization. While reputable, Consumer Lab has two downsides.

First, they put their protein powder results behind a paywall, and I had to purchase an annual subscription to view the data.

Secondly, their protein powders are given a “Pass/Fail” rating for heavy metals instead of showing the exact testing results.

Key protein powders identified on Consumer Lab are:

• IsoPure Zero Carb Protein
• Optimum Nutrition Gold Standard Whey

3. NSF and Informed Choice

NSF and Informed Choice are two international organizations that test products, like protein powders, to ensure they meet safety, quality, and purity standards. This includes testing for heavy metals.

Like Consumer Lab, these two organizations do not disclose the specific testing results for each batch or product they test. Instead, they give the products a “Certification” status. You can find all NSF certified protein powders here and the Informed Protein-certified products here.

The products that were found on NSF and Informed Protein include:

• Transparent Labs Grass-Fed Whey (Informed Protein)
• MyProtein Impact Whey (Informed Protein)
• Thorne (NSF)

4. Alternative Third-Party Testing Labs

I went back through the 30+ protein powders I tested for FeastGood.com and looked around their websites for indications of third-party testing for heavy metals.

In doing so, I found that Promix Whey Protein shows the testing results for each product on the individual product pages.

In searching deeper into the website, I found a page that allows you to put the lot number for your product in to see their testing results.

Their testing is done through Eurofins Laboratory, a global lab that specializes in sectors like food and pharmaceuticals.

Author’s Note:

When researching this topic yourself, you might come across a non-profit called the Clean Label Project, which has done a lot of work testing more than 130 different powders to identify contaminants like heavy metals and BPA.

They’ve created their own “certification” 5-star rating system and outlined which products passed their testing and which didn’t.

As a consumer, I don’t mind using them as a reference point, but from a journalism standpoint, I haven’t included them here for a couple of key reasons:

• They have not submitted their studies for peer review, which is critical for quality assurance.

• They don’t disclose their testing methodologies or provide the raw data from their testing. As such, we cannot replicate or substantiate their claims. NSF, a key organization that tests and certifies dietary supplements for safety, quality, and label accuracy, has a more in-depth article on this here.

Best Protein Powders Without Heavy Metals

1. MyProtein Impact Whey

Testing Results

• LabDoor Rating: 100/100
• Lead: None Detected
  Arsenic: None Detected
• Cadmium: None Detected
• Mercury: None Detected
• Protein Content: 19.5g detected out of 18g claimed (108%)

See the full LabDoor report here.

Informed Protein Certified with multiple batches tested in 2024

My Experience

There is a lot to love about MyProtein Impact Whey. First of all, as it relates to high quality third party testing, Impact whey has double certification, both through LabDoor and Informed Protein certified.

Secondly, when the protein content of Impact Whey was tested, it actually contained more protein than the label claimed to (19.5g versus 18g).

When I tested MyProtein Impact Whey, the only real critique I could come up with was that they used a lot of sweeteners/flavor additives and that the taste might be too sweet for some consumers.

Most varieties of Impact Whey contain both sucralose and acesulfame-potassium, two artificial sweeteners as well as “Natural and Artificial Flavors”.

The MyProtein website indicates that there are flavors that use natural sweeteners, but all that I could find on the US website was one option called “Vanilla Stevia”.

Any individuals who want to minimize flavor additives and optimize protein percentage can also opt for the unflavored protein powder.

Impact Whey protein contains approximately 76% protein per scoop, meaning that 76% of the total calories in the product come from protein. This falls within FeastGood.com’s criteria for a “good” source of protein, but falls shy of falling within the “Excellent” category, which is reserved for products which contain 85% or higher.

Impact Whey Protein is extremely budget-friendly, costing between $1.00 and $1.50 per serving, depending on which size you get. They also run sales what seems to be ALL the time. I’m sure if you head to their website right now you’ll likely see some sort of discount they’re running.

If you have a more flexible supplement budget, then you can choose Impact Whey Isolate, which offers up between 89-96% protein per scoop but will be a bit more expensive per serving. For me, I’d rather spend more and get a higher protein percentage.

I found that Impact Whey mixed up really easily and didn’t give me any negative side effects like bloating or gassiness.

Overall, MyProtein Impact Whey tastes great, has a ton of variety, and has LabDoor’s highest possible quality ranking with a score of 100/100, which give it the top spot for individuals concerned about heavy metal content and protein powder quality.

• Read my in-depth review of MyProtein Impact Whey here.

Transparency Note: For the purpose of this ranking, I am going to put MyProtein Impact Whey in the number one spot because it is the specific one that was tested and certified by LabDoor and is also Informed Protein Certified. When I personally tested MyProtein, I tested the Impact Whey Isolate, which is Informed Protein Certified but wasn’t tested by LabDoor. Both products are incredibly similar, with the Isolate form having a lower percentage of carbs and fats, therefore having a higher protein percentage and a little bit more expensive.

2. Legion Whey+

Testing results

• LabDoor Rating: 99.2/100
• Lead: None Detected
• Arsenic: None Detected
• Cadmium: 0.31 ug/serving Detected (Upper limit is 5.0 ug/day)
• Mercury: None Detected
• Protein Content: 22.2g detected out of 22g claimed (101%)

See the full LabDoor report here

My Experience

Legion Whey+ Protein gets the second spot, with the second highest LabDoor ranking of the protein powders on this list with a score of 99.2 out of 100.

Like MyProtein Impact Whey, Legion Whey+ tested at a higher amount of protein than what was disclosed on the label, 22.2g versus 22g.

For 3 of the heavy metals, there were no detectable amounts found in Legion Whey+. Cadmium was present, but tested well below the acceptable upper limit.

For consumers who want to avoid artificial flavors or colors and appreciate companies who prioritize the health and well-being of the dairy cows, Legion Whey+ will take the top spot over Impact Whey.

Legion uses a high quality patented type of grass-fed whey protein that guarantees that the milk is hormone- and antibiotic-free and that the cows are pasture raised.

Legion Whey+ is naturally sweetened and flavored and does not contain any artificial flavors, sweeteners, food dyes, preservatives, or fillers.

The tradeoff when you have a company who whole-heartedly adheres to the highest quality standards is that you end up with a more expensive product.

Legion Whey+ costs between $1.80-$2.00 per serving, well above the average cost of whey protein, which costs around $1.34.

If you are on the fence about whether or not it’s worth it, Legion does provide a No-Return Necessary 100% money-back guarantee on their product.

If you do like it, you can choose a Subscribe & Save feature, which allows you to save 10% on your orders.

Legion Whey+ offers a good protein percentage per scoop with most flavors falling above 80%.

I experienced no negative side-effects while using Legion Whey+. I did not experience any bloating, gassiness, or indigestion.

Aside from the cost, the only issue I really had with Legion Whey+ was that I found the cinnamon flavor had a really chemically aftertaste, which is perhaps a bit ironic given that they pride themselves on having “no chemical junk”.

I can’t pinpoint exactly what the taste was, but it did have a noticeable aftertaste. I found myself wanting to use the protein powder in things like oatmeal or baking where the aftertaste could be masked instead of having it with just water or plain yogurt.

Ultimately, for individuals who have a generous budget for protein powder and who prioritize the highest quality ingredients, Legion Whey+ provides a fantastic option.

• Read my in-depth review of Legion Whey+ here.

3. Transparent Labs Grass-Fed Whey

Testing Results

• LabDoor Rating: 98/100 (expired Sept 2024)
• Lead: None Detected
• Arsenic: None Detected
• Cadmium: None Detected
• Mercury: None Detected
• Protein Content: 27.3g detected out of 28g claimed (97.5%)

Find the 2023 LabDoor report here

Informed Protein Certified Dec 2023 with multiple batches tested in 2024

My Experience

Transparent Labs Whey would have taken the Number 2 spot on this list, but as a product tester and reviewer, I prioritize transparency.

LabDoor is the main organization that tests protein powders and publicly displays the results. It’s the ability to see the raw testing data that gave MyProtein Impact Whey and Legion Whey+ the top two spots.

For several years, Transparent Labs had been LabDoor certified, but their most recent certification expired in September of 2024. I’m not sure if they plan to renew this certification. I’m assuming yes, but at the time of writing this, the LabDoor certification has not been updated. If this changes, I’ll be sure to update this article.

Transparent Labs Whey is actively Informed Protein certified though, so we know it’s been recently tested for heavy metals and contaminants and has been given a passing grade.

If you’ve been a follower of our YouTube channel for a while, you’ll know that Transparent Labs frequently takes the top spot in many of our protein round-ups, including being one out of only two protein powders to take our “King of Gains” spot on our Ultimate Protein Powder Tier List.

It is the #1 protein that I choose to keep in my cupboard and use on a daily basis, and for good reason.

Transparent Labs finds an attractive sweet-spot between quality and price in the protein powder industry. Like Legion Whey+, Transparent Labs does not use any artificial flavors, colors, or preservatives in their products.

Transparent Labs Whey costs between $1.80 and $2.00 per serving. While this is an identical cost to Legion Whey+, a key difference is that the Transparent Labs protein contains 28g of protein per scoop but Legion Whey+ only has 22g. If we were to compare them across equal serving sizes, Legion Whey+ would cost between $2.30 and $2.55 to get the same 28g of protein.

I’ve also tried almost every single flavor of Transparent Labs protein, and there weren’t any that I tested that I actively disliked. While a few of them had a similar aftertaste to what I experienced with Legion Whey+ (specifically Oatmeal Chocolate Chip Cookie and Cinnamon French Toast), I didn’t find any flavors to be really off putting.

Flavor-wise, Transparent Labs falls right in the middle of the two other proteins mentioned above. It’s not as sweet as MyProtein Impact Whey, but has a better overall flavor than Legion Whey+.

Transparent Labs Grass-Fed Whey rated the highest for taste, texture, and mixability among all of the FeastGood.com team members who tried it, and like I said, after testing over 30+ whey protein powders, this is the one I keep coming back to.

Finally, Transparent Labs achieves everything mentioned above while delivering 93% protein per scoop for many of its flavors, which further cements its great value.

• Read my in-depth review of Transparent Labs Grass-Fed Whey here.

4. Promix Whey Isolate

Testing Results

• Lead: Below ppb Threshold
• Arsenic: Below ppb Threshold
• Cadmium: Below ppb Threshold
• Mercury: Below ppb Threshold
• Protein Content: Not indicated

Eurofins Laboratory: results displayed on the Promix website, not direct from the testing laboratory

My Experience

Promix almost got missed as an option for this list because of their use of a lab called Eurofins, which is not used by any of the 30+ protein powders that I have tested for Feastgood.com

Promix chose to publish the testing results on their website, but Eurofins does not display the results publicly on their website. While I trust that Promix is not being deceptive in its practices, it wouldn’t be possible to verify the validity of the Promix claims.

Promix also does not indicate exactly when their product was tested, which means we could be looking at outdated information.

I am not trying to imply that Promix is withholding information; I am simply stating that it is not easy to validate their claims when compared to other organizations like LabDoor, which release the raw testing data and the date/flavor/batch tested.

Promix provides a full 30g of protein per scoop, which is more protein than any other brands on this list. At 120-150 calories per scoop (depending on the flavor), Promix provides anywhere from 75% to 92% protein per scoop. The chocolate and vanilla flavors fall in the “Good” category for protein content, with Unflavored qualifying as an “Excellent” protein source.

Promix is another brand that really prioritizes its “clean” products, with marketing on their website that reads: “No Gums. No Gluten. No Soy. No Antibiotics. No Hormones. No GMOs. No Fillers. No Artificial Anything”.

Promix costs between $1.33-$1.68 per serving, which makes it the most affordable of the naturally-flavored protein powders on this list.

I found that Promix protein mixed really well, dissolving entirely with minimal effort. This was another protein powder that did not elicit any negative side effects like upset.

The biggest issue I found with Promix protein was the taste. I personally tried the vanilla flavor and I found that it didn’t really have a vanilla flavor at all, but it did have a very undesirable aftertaste.

With Legion Whey+, I could mask some of the negative aftertaste by mixing it with things like oatmeal or milk. Unfortunately, with Promix, it didn’t matter what I did. The negative aftertaste was always there.

Taste is very different from person to person, however, so if you want to prioritize all-natural ingredients and high-quality proteins but are on a bit of a tighter budget, then Promix might still be worth trying.

• Read my in-depth review of Promix Whey Isolate here.

5. Thorne

Testing Results

• NSF Certified for Sport: Testing results not displayed, but certification guarantees that “There are no unsafe levels of contaminants in the tested products”

My Experience

As we reach the bottom of the list, we are getting to products that DO have high-quality third-party testing certifications backing them.

The reason that these products have fallen lower on this list is not necessarily because they are lesser-quality proteins; it’s simply that their testing results aren’t displayed anywhere.

NSF is a very reputable international organization whose certification carries a lot of weight, and many large sporting organizations, like the NHL, require its athletes to consume only NSF-certified products.

Thorne contains 21g of protein per scoop, putting it on par with products like Impact Whey and Legion Whey+. Protein makes up 84% of the total calories of the product, which puts it again alongside those same two proteins falling within the “Good” range.

A big con to Thorne protein is that it costs around $2.07 per serving, which does make it the most expensive protein powder on this list. If we were to compare this gram for gram to Transparent Labs Protein, Thorne would cost $2.76 per serving.

Thorne protein powder mixed really well and had a thick and creamy texture, something that isn’t common among whey isolate proteins. It also contains added digestive enzymes, which will improve the total digestibility of the protein powder and minimizes the risk of side effects like bloating or gas.

Thorne does not use any artificial flavors or colors in their products, but they do not have the same flavor variety as Transparent Labs and Legion Whey+. Thorne Protein is only available in chocolate and vanilla, which could get dull with long-term use.

I really enjoyed using Thorne, and the NSF certification goes beyond just heavy metal testing to ensure that every batch of the product is free of banned ingredients and contaminants.

Thorne also provides a lot of additional health-related testing and various supplements. You may take advantage of some of the other supplements and services that Thorne offers, whereby it makes sense to bundle those items with your protein powder for convenience.

However, I do think that the other products on this list can achieve the same things that Thorne does at a much more reasonable price point.

• Read my in-depth review of Thorne Protein here.

6. IsoPure

Testing Results

• Consumer Lab Verified: PASS

My Experience

I really enjoyed testing IsoPure, and I remember feeling like the product might be too good to be true, since some of the flavors advertise 100% protein per scoop.

By this, I mean that the product has 0g of carbs and 0g of fat, and the only calories found within the product come directly from protein.

The fact that Isopure could do this while also offering their protein at a cost as low as $1.58 per serving seemed too good to be true.

In my initial review of IsoPure for Feastgood.com, I indicated they were not third-party tested.

That’s because the organization that “verified” IsoPure is called ConsumerLab, which puts their results behind a paywall that is not accessible without paying for a full year’s subscription at a time.

Because these products are behind a paywall, and because the products are just issued a “Pass/Fail” rating without any results publicly displayed, I have put the two ConsumerLab Verified protein powders at the bottom of this list.

The product that was tested and verified by ConsumerLab was the unflavored protein powder, but the product that I personally tested was the Dutch Chocolate flavor. For this article, I am making the assumption that the heavy metals testing result would be the same for the flavored varieties, but I can’t say that for certain.

I really loved my time testing Isopure. It smelled and tasted absolutely fantastic, and I was really impressed by how well it mixed up. Isopure has an added vitamin and mineral blend which provides even more value for a reasonable cost.

The Dutch flavor was so decadent I would warm it up to make a vitamin-rich “hot chocolate,” which was a treat I looked forward to every evening.

The flavored options of Isopure do use artificial flavors and sweeteners like sucralose, and they also use artificial coloring like Yellow 5 and Red 3. Personally, I’m trying to avoid these things nowadays.

If you are looking for a tasty protein powder with zero carbs and the highest protein percentages, IsoPure provides an appealing option.

If you are looking to minimize not only heavy metals but also other types of additives like food dyes, then I would choose the Unflavored IsoPure or double-check the ingredient list of your protein before ordering.

IsoPure does offer a “Naturally Flavored” selection, but the price goes up by about 15 cents per serving.

• Read my in-depth review of IsoPure Protein here.

7. ON Gold Standard

Testing Results

• Consumer Lab Verified: PASS

Informed Choice Certified

My Experience

Optimum Nutrition Gold Standard Whey is one of the most recognized protein powders globally due to its international fulfillment centers and decades-long existence in the industry.

Gold Standard Whey does have a double certification for heavy metal testing, something that puts other protein powders into the top spots on this list.

But there are a few reasons why ON Gold Standard Whey ranks lower on our list.

First of all, while both of the testing organizations, Consumer Lab Verified and Informed Choice Certified, do tests for heavy metals, one is behind a subscription paywall, and neither of these organizations disclose the testing results.

The second reason we find Gold Standard Whey lower down is that the product uses artificial flavors and sweeteners, and some of the flavors include artificial food dyes like Yellow 5 and Red 40 Lake.

Like I said, I’m trying to avoid these things because of their potential link to negative health outcomes. These food dyes are FDA-approved, and if you don’t mind their presence in your protein powder then Gold Standard Whey brings a lot to the table.

ON Gold Standard Whey is very inexpensive, costing between $1.00 and $1.10 per serving, which also makes it the most inexpensive protein powder on this list.

It offers around 80% protein per scoop, which falls evenly within the “Good” range for protein content and is in line with the majority of the proteins on this list, with the exception of Isopure and Transparent Labs, which sit comfortably in the “Excellent” category.

Even though I personally didn’t really enjoy the taste of Gold Standard Whey, it does come in more than 15 flavor varieties, which increases the likelihood that you will find a flavor that you enjoy.

Of all of the products on this list, I found that Gold Standard Whey had the worst mixability of all of them, with quite a few clumps and undissolved residue. This can be remedied by using a small immersion blender or spending some extra time with a whisk or fork to break up the remaining clumps. This definitely isn’t a deal-breaker issue, but it does add a level of inconvenience when compared to other protein powders.

If your main priorities are ensuring that your protein powder does not have heavy metals and maintaining the lowest possible cost per serving, then Gold Standard is a versatile and good-quality protein powder that checks both boxes.

• Read my in-depth review of ON Gold Standard here.

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About The Author

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Jennifer Vibert

Jennifer Vibert is a Certified Strength and Conditioning Specialist, Nutrition Coach, and supplement store manager. She has a Bachelor of Kinesiology with a major in Fitness and Lifestyle and a minor in Psychology from the University of Regina. She is a Certified Nutrition Coach through Precision Nutrition, with a passion for helping clients learn the fundamentals of nutrition and supplementation in order to build healthy, sustainable habits.

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