Protein Powders
If you are a fitness fanatic or someone who relies on protein powders to supplement your workouts or satisfy your nutritional needs, recent findings of heavy metal contamination in these products may concern you. A 2024 research discovered that nearly half of 160 tested protein powders from 70 popular brands surpassed California's Proposition 65 safety requirements for hazardous metals like lead and cadmium. This worrying figure calls into question the safety of some of the most popular protein supplements available. In this blog, we will look at what Proposition 65 is, why these infractions matter, which brands may be affected, and how you may make informed purchasing decisions.
Why Are Heavy Metals Found in Several Protein Powders?
Heavy metals like lead and cadmium are naturally present in the environment, particularly in soil and water. Plants, such as peas, hemp, or cocoa used in protein powders, can absorb these metals as they grow. This is especially true for organic products, which may be grown in less controlled environments where soil quality varies. Cocoa powder, a common ingredient in chocolate-flavored protein powders, is notorious for higher lead levels due to soil contamination.
While manufacturers don’t intentionally add heavy metals, the challenge lies in sourcing ingredients that meet Proposition 65’s ultra-low thresholds. Some brands have earned praise for rigorous testing and transparency, but many others either don’t test adequately or rely on the “naturally occurring” exemption, which doesn’t fully absolve them of labeling requirements.
Why Should You Care?
Although occasional exposure to trace levels of heavy metals may not cause immediate harm, long-term ingestion can result in major health consequences. The World Health Organization (WHO) notes that lead exposure can affect various body systems and is especially risky for young children and women of reproductive age.
The United States Environmental Protection Agency (EPA) warns that lead can damage cognitive function, diminish energy levels, and harm heart health. Prolonged exposure has been linked to high blood pressure, renal damage, and fertility issues. The EPA cautions that there is no safe level of lead for human consumption. According to the United States Department of Labor, cadmium can interfere with renal function and bone health, and it has been related to an elevated risk of some cancers.
Finding Safer Protein Powders
Look for third-party testing – Brands that voluntarily test their products for heavy metals often provide certificates of analysis (COAs). Look for labels that mention testing by organizations.
Choose organic, but verify testing – While organic protein powders may have fewer pesticide residues, they can still contain heavy metals from soil contamination. Always check for third-party test results.
Go vanilla – If you're a chocolate lover, consider switching to vanilla-flavored powders, which typically contain less lead and cadmium.
Check independent reports – Consumer advocacy groups periodically test protein powders for heavy metals. Reviewing these reports can help you make informed choices.