which is used as contrast for upper and lower GI studies
What the hell are these studies and why is it assumed Slashdot readers would know what they are? What's a "contrast" in this context?
Gl stands for Glycemic load. Barium is a rare earth metal. No idea how the test works exactly.
Is the submitter seriously asking us to suggest alternatives to barium? Worst submission ever. It could have explained what this bullshit means, and why China needed to improve safety?
Mining rare earth metals is very polluting. In the past two decades or so, most countries stopped producing rare earth metals, because China was producing enough and at a lower cost than they did. (It helped to have no pollution standards.) recently, China decided to keep its rare earth metals for itself to keep electronics manufacturing at home, and sharply cut exports. At the same time, its local population is increasingly vocal about pollution.
And agreed... TFS sucks and the question it concludes on is absolutely ludicrous.