How do scientists know the nutrients and other substances in food?

Take home message

Scientists can detect amounts as small as one part in a trillion.

1,000 = one thousand
1,000,000 = one million
1,000,000,000 = one billion
1,000,000,000,000 = one trillion

Between now and 30,000 BC, there have been 1 trillion seconds.  Scientists can now detect amounts as small as one of those seconds.


The following are examples of some of the techniques used to measure the nutrients in food:

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