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A comment on One of biggest frauds in U.S. farm history. Parent comment

Re:One of biggest frauds in U.S. farm history by markdown on Saturday January 25, 2020 @06:22PM (#22149269)
> For example copper sulfate, used as organic fungicide.

Why would one need to test for copper? The trace amounts of it that one would find are good for you. I mean, it's used for water piping in homes even.

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Re:One of biggest frauds in U.S. farm history by ceejayoz on Saturday January 25, 2020 @09:42PM (#22150052)
That's silly, like saying breathing chlorine is safe because it's a component in table salt.

https://en.wikipedia.org/wiki/Copper(II)_sulfate#Toxicologic...

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Re:One of biggest frauds in U.S. farm history by markdown on Saturday January 25, 2020 @09:45PM (#22150065)
No, it's like saying eating trace amounts of copper is safe as proven by the fact humans have been doing that since forever, and by the fact that health authorities endorse it (hospitals have copper piping).
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Re:One of biggest frauds in U.S. farm history by ceejayoz on Sunday January 26, 2020 @09:26AM (#22152194)
The enormous and simple point you're missing: just like chlorine versus sodium chloride, copper sulfate is not the same thing as plain old copper.
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