A tiny amount of lead is a tiny bit poisonous. Magnitude matters.

And time. People with a bll level 76% above baseline will wonder in ten years why they have coordination problems and trouble thinking.

That's the point -- the worst of these products don't have levels above baseline!

With an average US blood lead level of about 1 microgram per deciliter, an increase of 76% is still less than 2 micrograms per deciliter which would have an imperceptible impact on any neurological function for an individual. People with even a tenfold (1000%) increase above baseline don't show perceptible coordination problems. Not writing to have an argument. Just see a lot of people who suffer from misperception of the impacts of tiny levels of contaminants, people lose sleep non-stop worry, sometimes even lose the equity in their "contaminated" house by walking away from their loan due to misinformation about risk.

For chronic exposure, yes. You don't want it to be in your food all the time. But accidentally eating a tiny bit once would be safe.

That’s the whole point of this article. Many people will consume multiple servings of protein shake per day for most of their life, and they’re contaminated.

They're contaminated at levels comparable to other foods people eat (baseline).