sorry the last question was what is 500mcg in mg?

A microgram (10^-6 gram) is 1000th of a miligram which is 1000th of a gram. Divide your number in micrograms by 1000 to receive the miligram equivalent:500mcg / (1000mcg/mg) = 0.5mg 0.5 mg

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0.5mg

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0.5

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