Is Legion Protein Powder Clean?
Yes. Legion's Whey+ Protein passes Label Lookout's bar for a clean, lead-conscious protein powder. It's grass-fed Irish whey isolate, it carries Informed Sport certification, which requires every batch to be tested for banned substances and contaminants including heavy metals, and Legion publishes its Certificate of Analysis directly on the product page.
The evidence
Informed Sport is not a label a brand can buy for a logo. It's a UK-based certification program that requires ongoing batch testing against a substance list used by professional and Olympic sport programs, and heavy metals screening is part of that testing. Legion also has Whey+ tested by Labdoor, an independent lab that publishes its own methodology and results rather than letting brands self-report.
Independent testing outside Legion's own program backs this up. Ellipse Analytics, an outside analytical chemistry lab, ran 150 protein powder samples (whey, plant, and beef) through contaminant panels using ICP-MS, the standard method for detecting trace heavy metals. Legion Whey+ placed in the top half of that full sample set, and in the top 10% specifically for phthalates, pesticides, and bisphenols. That study did not publish a Legion-specific lead number, so we will not invent one here. What we can say plainly: grass-fed Irish whey isolate already starts as one of the lower-risk protein sources (see our full breakdown of what makes a protein powder test clean for lead for why sourcing and processing matter), and Legion adds real, ongoing certification on top of that sourcing advantage.
What this doesn't cover: Informed Sport and Labdoor testing focus on contamination and banned substances, not long-term health outcomes, and no third-party test guarantees zero batch-to-batch variation forever. If you want the most current results, Legion links its live COA from the Whey+ product page, and it's worth a quick check against the batch you're actually buying.
Why the sourcing matters as much as the certification
Certification only tells you a brand is checking. Sourcing tells you what they're checking for is likely to be low to begin with. Whey+ starts from grass-fed dairy cows in Ireland, where agricultural and feed regulation is stricter than in much of the world, and where cows are pasture-raised rather than confined. That matters because heavy metal exposure in dairy largely traces back to what the animal eats and where it grazes, not the milk itself. Whey isolate (as opposed to whey concentrate) also goes through more filtration, which strips out fat and lactose along with trace residue that concentrate leaves behind. Neither fact replaces testing, but together they explain why whey isolate from grass-fed, well-regulated dairy consistently tests lower than plant proteins grown in contaminated soil, and why Legion's numbers aren't a fluke of one good batch.
What it means for you
If you're choosing between Legion and a protein powder with no certification and no published testing, Legion is the safer pick on contamination specifically. If you're choosing between Legion and another certified, tested option, the alternatives below are worth comparing on ingredients and format, since they clear a similar testing and sourcing bar. And if you already own a tub of Whey+, the fastest way to confirm your specific batch is to pull up the COA link on Legion's product page and check the lot number against your bag.
The alternatives
- LEGION Whey+ Protein: best overall. Grass-fed Irish whey isolate, Informed Sport certified, sweetened with stevia only, no fillers or proprietary blends.
- Equip Foods Prime Protein: best for a single-ingredient label. Just grass-fed beef protein isolate and nothing else, and dairy-free for anyone avoiding whey specifically.
- NAKED Pea Protein Powder: best plant-based. Single-ingredient pea protein isolate with no gums, sweeteners, or added flavoring, for anyone skipping dairy and animal protein altogether.
- Equip Foods Grass Fed Collagen: best if you want to stack collagen peptides alongside your protein rather than switch away from whey.
If Legion's approach to testing is what sold you, the rest of the line follows the same standard. The Micronized Creatine Monohydrate is Labdoor tested and single-ingredient, and the Pulse Pre-Workout publishes clinical doses instead of a proprietary blend, the same transparency that makes Whey+ worth recommending in the first place.
For a wider comparison across brands, see our best clean protein powders roundup. If you're building out a full routine, our guide to a clean supplement stack covers what to add next, and the full supplements category has everything we've vetted.
Bottom line
Legion Whey+ Protein is clean by the standard that actually matters here: independent, ongoing batch testing for contaminants, publicly posted results, and grass-fed sourcing that starts with lower risk than most of the category. That combination is a higher bar than most protein powders on the market clear.