That said, they ought to give pause to the ....

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momowuwen

Member
Chinese
In the following passage, the red line confused me, especially the "That said". What does that mean? Is that a fixed expression? What does the "That" indicate?

Thank you!

None of this is to say that people must immediately bin all vitamin-containing substances; vitamins are, after all, essential nutrients. Moreover, untangling cause and effect in studies like these is notoriously tricky. And it does not help that the boffins themselves seem baffled by the results. That said, they ought to give pause to the most voracious supplement poppers.

Source: an article in The Economist discussing dietary supplements.
 
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