Health

Heavy Metals in Food

Heavy metals like arsenic, cadmium, and lead are naturally found in the soil, but the widespread use of leaded gasoline, lead-based pesticides, and other manufacturing processes have contributed to higher levels in products that are farmed and fished, and even your tap water. That’s why for decades CR has tested a wide variety of foods, drinks, and supplements for heavy metals: So you can choose products with lower levels and help keep your family safe.

Updated January 9, 2026

Readers Asked Us to Test These 5 Protein Powders. All Had Low Levels of Lead.

We tested powders from Clean Simple Eats, Equate, Premier Protein, Ritual, and Truvani. Our results underscore that it’s possible to make products with less contamination.

Answering Your FAQs: High Levels of Lead in Protein Powders and Shakes

Best Chocolate and Vanilla Protein Powders and Shakes, Based on CR’s Lead Testing

Answering Your FAQs: High Levels of Lead in Protein Powders and Shakes

Best Chocolate and Vanilla Protein Powders and Shakes, Based on CR’s Lead Testing

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Hidden Dangers in Our Food Supply

Protein Powders and Shakes Contain High Levels of Lead

Protein supplements are wildly popular, but CR’s tests of 23 products found that more than two-thirds of them contain more lead in a single serving than our experts say is safe to have in a day.