Is Lead in Protein Powder Actually a Health Risk — Or Is Consumer Reports Grading on a Curve Nobody Else Uses? 

Quick answer: Both things are true at once, and that gap between them is exactly what the story turns on. Consumer Reports tested 23 protein powders and shakes over three months and found more than two-thirds exceeded its own “Level of Concern” for lead, a threshold it set at 0.5 micrograms per day, borrowed from California’s Prop 65 maximum allowable dose. The products containing the most lead, Naked Nutrition’s Vegan Mass Gainer and Huel’s Black Edition, came in at over 1,200% of that figure. But FDA’s own interim reference level for lead, the one actually built to protect the most vulnerable group, women of childbearing age, is 8.8 micrograms per day, nearly 18 times higher than CR’s bar, and FDA has never set a specific lead limit for protein powder at all. The detected lead is real. Whether it’s dangerous depends entirely on which yardstick you’re willing to accept, and right now nobody, including FDA, has settled on one. 

Subscribe to our newsletter to stay up to date with all our content.

What Did Consumer Reports Actually Test, and Find? 

Consumer Reports’ investigation analyzed 23 protein powders and ready-to-drink shakes from popular brands, buying multiple samples across different lots over a three-month window. More than two-thirds of the products exceeded CR’s daily safety threshold in a single serving. Two products landed at 1,200 to 1,600% of that limit, two more at 400 to 600%, and six additional plant-based powders plus five dairy-based options also crossed the line. The two products containing the most lead, by name: Naked Nutrition’s Vegan Mass Gainer, at 7.7 micrograms of lead per serving, and Huel’s Black Edition, at 6.3 micrograms. Garden of Life’s Sport Organic Plant-Based Protein and Momentous’ 100% Plant Protein followed at 400 to 600% of CR’s threshold. Every one of the four named products with the highest lead levels is a plant-based product, consistent with the well-documented tendency of lead and other heavy metals to accumulate in plants grown in contaminated soil, cacao and certain plant proteins in particular, rather than dairy-based whey. 

Where Does CR’s ‘Level of Concern’ Actually Come From? 

CR set its threshold at 0.5 micrograms of lead per day, a figure drawn from California’s own Prop 65 safe-harbor list, which sets lead’s Maximum Allowable Dose Level for reproductive toxicity at exactly that number. Worth noting: Prop 65 actually publishes two separate lead thresholds on that same list, the 0.5 microgram MADL for reproductive harm, and a separate, higher No Significant Risk Level of 15 micrograms per day for cancer risk. CR chose the stricter of California’s own two numbers, not the only one available, and describes its choice as “the most protective lead standard available,” which is accurate as a description of where that figure sits among possible benchmarks, but it’s also, by definition, the strictest one on the table, not a consensus safety line every regulator or toxicologist has converged on. 

How Does That Compare to What FDA Actually Uses? 

FDA’s own interim reference levels for dietary lead, set under its Closer to Zero initiative, are 2.2 micrograms per day for children and 8.8 micrograms per day for women of childbearing age, a group FDA specifically protects against because of fetal and nursing-infant exposure, not a general adult ceiling. That 8.8 microgram figure, the one most directly comparable to an adult consumer drinking a protein shake, is nearly 18 times higher than CR’s 0.5 microgram bar. And FDA’s own guidance is explicit that it hasn’t set an action level or regulatory limit for lead in protein powder or dietary supplements specifically; its lead-related guidance to date covers bottled water, candy, juice, and food intended for babies and young children. 

What’s the Industry’s Rebuttal, and Does It Hold Up? 

The Council for Responsible Nutrition’s own response pushes on exactly this gap. 

“A finding that a product exceeds CR’s self-imposed threshold is not the same as exceeding a government safety limit, nor is it evidence of any safety risk.”  — Council for Responsible Nutrition, official statement 

CRN also argues that CR’s write-up is missing context on how products were selected and whether the testing reflected typical consumer use, and that “without harmonization to established federal benchmarks, or even actual safety risk, such proprietary thresholds can overstate risk.” That’s a fair criticism of the framing. It doesn’t, however, address the underlying lab numbers themselves, which CR obtained through its own testing and which CRN’s statement doesn’t dispute. 

Is Any Regulator Actually Filling That Gap? 

California is trying. State Senator Steve Padilla introduced SB 1033 in February 2026, co-sponsored by Consumer Reports and the Environmental Working Group, which would require protein product manufacturers to test for heavy metals, publicly disclose the results, and stop selling any product that fails to meet a compliance standard, modeled on California’s existing disclosure laws for baby food and prenatal supplements. 

“Consumers deserve to know what they are putting into their bodies, and right now there’s a troubling lack of transparency when it comes to toxic heavy metals.” — Sen. Steve Padilla (D-San Diego) 

The bill cleared the Senate Health Committee on a 10-0 vote in March 2026 and was headed to the Senate Environmental Quality Committee as of that vote, the most recent public status available at this writing. It’s still short of becoming law, and California-only disclosure isn’t the same as a federal limit, but it’s the clearest sign yet that a real testing-and-disclosure standard may arrive at the state level before FDA sets one nationally. Nutraceuticals World covered the bill’s introduction when it was first filed. 

So Is This Actually a Health Risk? 

The honest answer sits between the two positions. The detected lead levels are real, consistently higher in specific named products, and worth a supplement brand’s attention regardless of which regulatory line gets applied; “exceeds CR’s internal bar” and “exceeds a government safety limit,” though, are different claims, and right now the second one can’t even be tested, because no federal limit exists for lead in protein powder specifically. That absence, not CR’s number or CRN’s rebuttal, is arguably the more useful finding here: an entire, fast-growing category is being graded against a private yardstick because no public one exists yet. 

What Should Brands Actually Do With This? 

Brands would be wise not to wait on a number that isn’t coming soon. Waiting for FDA to publish a protein-powder-specific lead limit isn’t a near-term plan; the agency’s Closer to Zero work so far has focused on baby food, not sports nutrition, and SB 1033 is still moving through committee rather than sitting on the books. In the meantime, third-party heavy-metal testing against multiple published benchmarks, not just an internal pass/fail, gives a brand something concrete to point to when a customer, or a California regulator, asks. Given that all four of CR’s named highest-lead products were plant-based, sourcing and soil-origin screening for plant proteins and cacao-derived ingredients is the more targeted place to start than a blanket reformulation. Protein isn’t the only powder category this has hit, either: Recent testing on greens powders and spirulina found comparable heavy-metal patterns against the same Prop 65 benchmark, in a category built on the same plant-and-soil supply chain. The through-line across both categories is the same: know your soil, and test against more than one bar.