Sherman-Bourquin unit of vitamin B2
Pronunciation: sher'man bur'kwin
the amount of vitamin B2 required in the diet daily to sustain an average weekly gain of 3 g for 8 weeks in standard test rats; one unit is equivalent to 1–7 mcg (0.001–0.007 mg) of riboflavin, depending on the deficiency diet used in the above assay.
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Examples: glitazone, GI cocktail, etc.