It's annoying that the title and summary alone tell me nothing, without additional information about 1) how sensitive are these tests, and 2) what concentration is medically significant.

The missing sentence could be, "That's because modern detection methods are now so amazingly accurate that they can detect insignificant quantities of chemicals."

Or it could be, "Therefore, if you drink beer you will be poisoned and die a horrible death."

Or maybe it's just, "Start worrying, and we'll figure out if it means anything later."

Reminds me of the completely vacuous headlines in financial media.

"Stock x went up yesterday and then went down"

In the twitter world, media is like junk-food. Mostly empty calories, soundbites, and memes.