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Microgram = µg (or ug), not mcg


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I know it might seem pedantic but microgram is not abbreviated to mcg except when used for medical dosage purposes in mainland USA.

µg is the internal standard unit for microgram, and if µ cannot be used then the replacement is not mcg but ug. This is important as mcg is in fact the accepted abbreviation of another, now mostly unused, unit of measure called microcentigram which is 10µg, or 10 times more. 

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