Finding a protein powder that is safe, effective, and free from heavy metals can be a challenge. Heavy metals like lead, cadmium, arsenic, and mercury have been found in some health products and supplements, including whey protein. While some metals like iron, zinc, and copper are essential for the body, others can accumulate and cause health issues over time if consumed in large amounts.
The good news is that most high-quality protein powders are tested and certified to be free from harmful metals. After months of research and testing, here’s a guide to seven of the best protein powders that minimise heavy metal exposure.
1. MyProtein Impact Whey Isolate
MyProtein Impact Whey Isolate takes the top spot. This protein is certified by high-quality third-party testers, including LABdoor and Informed-Choice. When tested, it actually had slightly more protein than labelled: 19.5g versus 18g per scoop.
Pros:
- 76% protein per scoop.
- Budget-friendly and often on sale.
- Good mixability, no bloating or gas.
- Variety of flavours available; also comes unflavoured for minimal additives.
Cons:
- Some flavours are very sweet due to artificial sweeteners and flavour additives.
This is a great choice if you want a protein powder that is rigorously tested for safety while being affordable.
2. Legion Whey+
Legion Whey+ is another excellent option, using grass-fed whey from hormone- and antibiotic-free cows. It is naturally sweetened without artificial additives and has one of the highest LABdoor scores at 99.2/100.
Pros:
- 22.2g protein per scoop.
- No artificial flavours, colours, or preservatives.
- Sweetened naturally.
- Most flavours above 80% protein per scoop.
Cons:
- More expensive ($1.80–$2 per serving).
- Some flavours, like cinnamon, may have an unusual aftertaste.
This is perfect for those prioritising quality and natural ingredients, even if it costs a bit more.
3. Transparent Labs Grass-Fed Whey
Transparent Labs offers a protein powder that balances quality and price. Although LABdoor certification recently expired, it is Informed-Choice certified, ensuring heavy metal safety.
Pros:
- 20–28g protein per scoop, depending on flavour.
- No artificial flavours, colours, or preservatives.
- Excellent taste, mixability, and texture.
- Many flavours maintain 93% protein per scoop.
Cons:
- Certification data not publicly updated yet.
This powder is reliable and versatile, a consistent favourite for daily use.
4. Promix Whey Isolate
Promix Whey Isolate is clean and simple, with no gluten, soy, antibiotics, hormones, GMOs, or fillers. Each scoop provides 30g of protein with 75–92% protein content depending on the flavour.
Pros:
- Affordable ($1.33–$1.68 per serving).
- Minimal additives and very clean ingredients.
- Mixes easily, no digestive issues.
Cons:
- Flavours can have a noticeable aftertaste, especially vanilla.
Promix is ideal if you want a naturally flavoured protein powder on a budget.
5. Thorne Whey Protein Isolate
Thorne Whey Protein is NSF certified, making it a safe and reputable choice. It provides 21g protein per scoop, with protein making up 84% of calories.
Pros:
- Thick, creamy texture.
- Added digestive enzymes for easier absorption.
- No artificial flavours or colours.
Cons:
- Only available in chocolate and vanilla, which can get repetitive.
- Higher price per serving (~$2.7).
Thorne is excellent for those who want certified, high-quality protein with digestive support.
6. Isopure Whey Protein Isolate
Isopure offers a zero-carb, zero-fat protein powder with 100% protein per scoop in some varieties. It’s verified by ConsumerLab, though detailed results are behind a paywall.
Pros:
- High protein content, low calories.
- Good mixability and taste.
- Flavoured options available; Dutch chocolate is highly recommended.
Cons:
- Artificial colours in some flavoured options.
- Certification results not fully accessible.
Isopure is ideal for those who want a high-protein, low-carb powder without heavy metals.
7. Optimum Nutrition Gold Standard Whey
Optimum Nutrition Gold Standard Whey is one of the most recognised protein powders globally. It offers 80% protein per scoop and is certified for heavy metal safety.
Pros:
- Affordable ($1–$1.10 per serving).
- Over 15 flavour varieties.
- Double heavy metal certification.
Cons:
- Mixability can be inconsistent; may require a blender or whisk.
- Uses artificial flavours and sweeteners, with some artificial food dyes.
This is a solid choice if you want a trusted, low-cost protein powder while ensuring safety from heavy metals.
Final Thoughts
Heavy metals in protein powders are a concern, but with proper research, you can find safe and high-quality options. The seven protein powders above are tested, certified, and prioritise consumer safety while providing excellent protein content. Whether you want an affordable option or a premium, all-natural choice, there’s a protein here to fit your needs.