Lead in protein powders. What you need to know

Happy Monday from Atlanta! I just tried to convince thousands at a public health conference that it’s time to reimagine systems—not just defend the status quo. I’m happy to report that tomatoes weren’t thrown my way. This is my fourth state in five days, and the highlight is actually seeing the seasons change and meeting a lot of you in person. I couldn’t be more excited to see my girls (and survive another round of the KPop Demon Hunters soundtrack).

This week’s Dose runs the gamut: from what’s really going on with lead in protein powders (and whether you should be worried), to a refreshing burst of leadership as 15 governors join forces to strengthen public health collaboration, to falsehoods swirling around mammograms. We’ll wrap with an infectious disease weather report and a quick note for dog owners on an FDA recall.

Let’s go!

Consumer Reports found lead in protein powders. How bad is it?

Last week, Consumer Reports released an analysis revealing elevated lead levels in several popular protein powders and shakes. Google searches for “lead in protein powder” spiked 300%, and influencers lit up social media. Depending on which news source you read, it was either a five-alarm fire or no big deal.

So what’s actually going on? Lead is everywhere—soil, food, water, and air. Thankfully, overall exposure has dropped dramatically since the 1970s, and modern lab tests can now detect vanishingly small amounts (down to parts per billion). But detection does not necessarily equal danger.

How bad is bad? That’s where things get tricky because not everyone agrees:

• California limit: 0.5 mcg/day. This number comes from a very conservative calculation: regulators took the “no observable effect” level for reproductive harm for inhaled lead exposure in workplaces and divided it by 1,000. Many experts argue that this threshold is unrealistic. It’s also not linked to adverse health outcomes.

• FDA’s limit: 2.2 mcg/day for kids, 8.8 mcg/day during pregnancy, and 12.5 mcg/day for other adults based on blood lead levels, toxicology data, and a built-in 10x safety factor.

• European Union limit: Allows up to 3 mg/kg (3 ppm) in food supplements—roughly 90 mcg per 30-gram scoop of protein powder. In this case, the FDA is far more