What Recent Tests Reveal About Protein Powder Safety

By some estimates, the global protein powder industry was valued at $24.24 billion in 2024 and is projected to grow to nearly $40 billion by 2032. That’s… a lot of protein. Increasing consciousness of health and demand for sports nutrition, along with the growing popularity of plant-based nutrition and changing dietary habits, all contribute to this anticipated growth. North America reportedly is responsible for about 37% of that market share. 

While it doesn’t seem that much would shake the enthusiasm (pun intended) of athletes, fitness influencers, and everyday consumers for their daily protein boost, recent headlines might change some of their perceptions.

Troubling findings for contents of protein powders

In October 2025, Consumer Reports indicated that more than two-thirds of protein supplements exceeded the recommended maximum 0.5 micrograms (µg) of lead per serving. This was based on a test of 23 protein-supplement products. 

Independent non-profit the Clean Label Project reviewed 160 products across more than 70 brands and determined that 47% exceeded at least one safety guideline for concentration of heavy metals. 

It’s important to put these test results into context, however. Consumer Reports used the California benchmark for lead exposure, which is stricter than the FDA’s guidelines. California allows for 0.5 mcg of lead per day, which the state deems “safe” consumption. The state researchers say this amount has “no observable effect” for reproductive harm from inhaled lead exposure in workplaces, and then divided that figure by 1,000. Still, many experts say that because of our constant exposure to lead in the environment, this is not a realistic threshold. 

Because Consumer Reports used the very strict California standard for lead testing, the results of the protein powder lead levels are higher than if they’d used, for instance, FDA guidelines.

It’s important to realize that lead is everywhere—in soil, food, water, and even the air. However, the average person's exposure has dropped considerably in the past few decades. Lab tests today can detect the tiniest amounts of lead, which is far more precise than previous testing. 

Nonetheless, the guidelines for a safe amount of exposure are up for debate. Different health agencies have different opinions on this controversial topic. 

The FDA says the limits should be as follows:

However, the European Union law allows up to 3 mg/kg in food supplements, which is 90 mcg per 30-gram scoop of protein powder.

How does lead get into protein shakes?

Many plant-based proteins, such as pea, rice, and hemp, are grown in soil that might contain residual lead from industrial activity, mining, or contaminated irrigation. Processing and drying grains or pulse crops can concentrate trace contaminants, including heavy metals, into powders.

Dietary supplement manufacturing is regulated differently from pharmaceuticals. Manufacturers are responsible for safety testing, but most supplements do not require federal pre-market approval.

Experts caution that while many of the tested products were within federal law limits, the cumulative exposure risk, especially for vulnerable groups (pregnant women, babies and children) or heavy users, is the real concern.

Should you be worried about lead in your protein powder?

There are a couple of distinct categories of people for whom the risk is higher than average. These include:

1. Children and teens. A still-developing brain is more vulnerable to low-level lead exposure, which has been linked to cognitive and behavioral effects.
2. Pregnant or breastfeeding people. Lead crosses the placenta and can affect fetal development.
3. Heavy supplement users. If someone uses multiple servings daily and stacks with other supplements, their cumulative lead exposure increases.
4. Consumers who are already exposed to lead contamination. Those living in an environment such as an old home or with lead-contaminated water pipes, or who work in high-risk occupations, might already carry a heavier lead burden.

Does the recent news about lead in protein powders mean you should avoid them?

Not necessarily. As poet Oscar Wilde said in the 1800s, “everything in moderation.” Though he certainly wasn’t referring to protein shakes, he does make a good point: Complete avoidance is likely unnecessary, but smart consumption is wise. 

Here are a couple of suggestions:

• Choose products from brands that publish third-party lab tests showing lead, arsenic, and mercury content.
• Consider using one well-tested serving rather than stacking many.
• Rotate between powder/shake sources and whole-food protein like eggs, dairy, or fish to reduce reliance.
• If you’re pregnant, a child, or have a known lead exposure risk, consult your healthcare provider and possibly consider a blood-lead test.

The average American consumes 5.3 mcg of lead per day from food and the environment. However, adding the amount in a protein supplement could raise your intake to the 8.8 mcg recommended limit for pregnant people. If you’re concerned, it’s worth considering cutting back on your smoothies and protein shakes.

Legal considerations related to lead levels in protein shakes and powders

If a consumer was to suffer actual, provable harm from lead in protein powders or supplements, this could trigger a discussion of product liability, failure to warn, or breach of warranty law if a supplement doesn’t meet safe standards. However, proving causation will be difficult. It will be very challenging to link long-term low-level lead exposure from a specific product to measurable harm. 

Manufacturers often disclaim liability and use independent lab testing, but transparency, batch traceability, and clear labeling remain key defenses. Consumers and attorneys should preserve batch numbers, laboratory test results, purchase receipts, and usage history in case of future claims.

The bottom line: Is this a moment for panic? No. Should you be wary and think a little more about what you’re consuming? Yes. 

The more plant-based “alternative” protein gains popularity, the more important it becomes to scrutinize manufacturing transparency and supplement quality. For most healthy adults using one serving occasionally, the risk may be low. But for children, pregnant users, or heavy supplement consumers, awareness and prudent selection matter significantly.