A recent Consumer Reports investigation found that more than two-thirds of protein powders contain lead levels exceeding safe daily limits. Some products tested contained lead amounts over 10 times higher than what experts consider safe to consume in a day.
This isn’t new. Consumer Reports first tested protein powders 15 years ago and found similar issues. But the 2025 results show the problem has gotten worse, not better.
The Testing Results
Consumer Reports tested 23 popular protein powders and ready-to-drink shakes for lead in protein shakes and powders between November 2024 and February 2025. They purchased products from Amazon, Walmart, Vitamin Shoppe, and Whole Foods Market. Each product was tested from multiple batches to ensure accurate results.
The findings were alarming. About 70% of products contained more than 120% of the safe daily lead limit, which experts set at 0.5 micrograms per day. All products delivered the amount of protein listed on their labels, ranging from 20 to 60 grams per serving. But that protein came with a heavy cost.
Two products stood out for the wrong reasons. Naked Nutrition Vegan Mass Gainer contained 7.7 micrograms of lead per serving. That’s 1,570% of the daily safe limit. Huel Black Edition powder had 6.3 micrograms, or 1,290% of the safe amount. Experts recommend avoiding these products entirely.
Four other products had dangerously high levels too. Garden of Life Sport Organic Plant-Based Protein and Momentous 100% Plant Protein both contained between 400% and 600% of safe lead limits. Consumer Reports suggests limiting these to once per week at most.
The good news? One product tested showed no detectable lead. MuscleTech 100% Mass Gainer came back clean in all tests.
Does Protein Powder Have Lead?
Yes. Lead exists naturally in Earth’s crust, and plants absorb it from soil as they grow. This means any food product made from plants will contain some level of lead. The question isn’t whether lead is present but how much.
Processing makes things worse. Turning whole peas into protein powder involves multiple steps. First, the peas are dehulled and ground into flour. Then the flour gets mixed with water to separate protein from starch and fiber. Finally, the protein is treated with food-grade acid and spray dried into powder. Each step creates opportunities for additional contamination, depending on the machinery and water quality used.
Many companies don’t reveal where they source their ingredients. But historically, most pea protein sold in the United States comes from China. The FDA rarely audits foreign supplement makers, which means quality control varies widely.
Plant-Based vs Dairy Protein
The type of protein matters significantly. Plant-based powders contained nine times more lead than dairy-based options like whey. They also had twice as much lead as beef-based protein powders.
Nearly all plant-based products tested showed elevated lead levels. Meanwhile, dairy-based powders generally performed better, though half still had enough lead that experts advise against daily use.
This pattern makes sense. Plants naturally absorb whatever exists in their environment, including heavy metals in soil and water. Dairy and meat products can also contain lead, but the contamination pathways differ. Cows get lead exposure through feed, water, and soil, but the concentration rarely reaches the levels seen in plant-based sources.
Pea protein has become popular in recent years because of its neutral flavor and low allergen risk. But this popularity comes with trade-offs that many consumers don’t realize.
Health Effects of Lead Exposure
No amount of lead is safe for human consumption. Lead serves no beneficial function in your body and can cause harm at any level of exposure.
Short-term symptoms include metallic taste in your mouth, abdominal pain, nausea, and headaches. Long-term exposure causes more serious problems. These include memory loss, difficulty concentrating, elevated blood pressure, kidney damage, and fertility issues in both men and women.
Pregnant women face particular risks. Lead exposure can cause miscarriage, stillbirth, premature birth, and low birth weight. It can also affect fetal brain development, leading to learning disabilities and behavioral problems later in life.
The average American already gets 5.3 micrograms of lead daily through normal food consumption. Adding a serving of Naked Nutrition Mass Gainer (7.7 micrograms) would put you well over the FDA’s interim reference level of 8.8 micrograms per day for adults.
And food isn’t your only source. Lead also exists in air, soil, household dust, and old paint. Every additional source pushes your total exposure higher.
Which Protein Powder With Lead Should You Avoid?
Based on Consumer Reports testing, these products had the highest lead contamination and should be avoided or severely limited.
Avoid completely:
Naked Nutrition Vegan Mass Gainer (7.7 mcg lead per serving)
Huel Black Edition powder (6.3 mcg lead per serving)
Limit to once per week maximum:
Garden of Life Sport Organic Plant-Based Protein
Momentous 100% Plant Protein
Use cautiously (not daily):
MuscleMeds Carnivor Mass powder (beef-based, over 200% of safe limit)
Six additional plant-based powders
Five dairy-based powders and shakes
One additional beef powder
Consumer Reports published the full list of tested products with specific contamination levels. You can view their complete findings and methodology at Consumer Reports.
How to Choose Safer Options
Look for third-party testing certifications. NSF Certified for Sport and Informed-Sport both test products for heavy metals and other contaminants. These certifications mean an independent lab verified what’s actually in the product, not just what the label claims.
NSF allows up to 10 micrograms of lead per serving, which is 20 times higher than Consumer Reports’ recommended limit. But products with NSF certification still tend to be safer than uncertified alternatives because they face regular testing and oversight.
Very few companies publish their heavy metal testing results. Momentous and Transparent Labs both make test results available on their websites. KOS and Equip Foods say they’ll provide results if customers request them. If a company won’t share testing data, that’s a red flag.
Choose dairy-based proteins when possible. Whey and casein powders consistently show lower lead levels than plant-based alternatives. If you prefer plant-based options for dietary or ethical reasons, look for products that source ingredients from North America rather than overseas.
Flavor doesn’t matter as much as you might think. Previous studies identified chocolate as a notable source of heavy metal contamination. But Consumer Reports found no meaningful difference between chocolate and vanilla products in 2025 testing.
Better Protein Sources
You probably don’t need protein powder at all. Most Americans already get more protein than federal guidelines recommend. Men consume about 155% of recommended amounts, and women get about 135%.
The average healthy adult needs 0.36 grams of protein per pound of body weight. For a 170-pound person, that’s about 61 grams daily. You can hit that target with one cup of plain Greek yogurt and 3.5 ounces of chicken breast. Or skip the chicken and eat 5 ounces of tempeh instead.
Older adults need slightly more. Aim for 0.45 to 0.59 grams per pound to offset age-related muscle loss. Pregnant women and serious athletes also have higher requirements. But even these groups can usually meet their needs through whole foods.
Use our Protein Calculator to determine your specific needs based on your age, weight, activity level, and goals.
Whole food protein sources include beans, lentils, tofu, eggs, dairy products, fish, poultry, and lean meats. These foods provide protein without the processing steps that introduce heavy metal contamination. They also contain vitamins, minerals, and fiber that isolated protein powders lack.
If you make your own protein shakes, swap the powder for peanut butter, Greek yogurt, or milk. You’ll get clean protein plus nutrients that support overall health.
The Regulatory Problem
Protein powders fall into a regulatory gray area that leaves consumers vulnerable. The FDA doesn’t review, approve, or test supplements before they hit store shelves. Manufacturers don’t have to prove their products are safe before selling them. There are no federal limits for heavy metal content in protein powder.
This wasn’t always true. Before 1994, companies had to prove herbal products were safe before selling them. Then Congress passed the Dietary Supplement Health and Education Act, which sharply limited FDA authority. Now supplements are “presumed safe unless found otherwise.”
The FDA relies on voluntary complaints and factory inspections to catch problems. But those inspections cover only a tiny fraction of the industry. About 12,000 supplement manufacturers operate in the United States. Last year, the FDA inspected just 600 of them.
This means contaminated or unsafe supplements regularly reach consumers before anyone catches the problem. A 2023 Government Accountability Office report found FDA oversight so inadequate that it urged Congress to expand the agency’s authority.
Companies can set their own standards for what counts as “harmful.” Many told Consumer Reports they follow guidelines from the FDA, EPA, World Health Organization, or European Food Safety Authority. But most of those organizations have no specific limits for lead in protein powders. The ones that do set thresholds far higher than what public health experts consider safe.
What You Should Do
Cut back on protein supplements if you use them regularly. Most people don’t need them to meet their protein goals. Whole foods provide better nutrition without the heavy metal exposure.
If you do use protein powder, limit it to a few times per week rather than daily. Avoid products with California Prop 65 warnings on the label. These warnings indicate the product contains chemicals known to cause cancer, birth defects, or reproductive harm at levels the state considers significant.
Check whether your preferred brand publishes heavy metal testing results. If they don’t, ask for them. Companies that refuse to share testing data should raise concerns.
Choose dairy-based proteins over plant-based when you do buy supplements. Whey and casein consistently test lower for lead contamination. And calculate your actual protein needs before buying any supplement. Use the USDA protein calculator or our Protein Calculator to get personalized recommendations based on your age, weight, and activity level.
Track your lifting progress and nutritional needs with our Barbell Calculator and 1 Rep Max Calculator to optimize your training without relying heavily on supplements.
The protein industry has grown into a multibillion-dollar business by convincing people they need more protein than they actually do. Don’t fall for it. Most people eating a balanced diet already get plenty of protein through normal meals. Adding supplements just increases your exposure to contaminants like lead without providing meaningful benefits.
Check CDC guidance on lead exposure symptoms to understand warning signs and protect your health.
Disclaimer: This article is for informational and educational purposes only and should not be considered medical, nutritional, or professional health advice. Always consult a qualified healthcare professional before making major dietary changes or using supplements regularly.










