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In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances. International units are used to quantify vitamins and biologics ( hormones , some medications , vaccines , blood products and similar biologically ...
During lactation, the RDA increases to 1,200–1,300 RAE/day (about 4,000–4,300 IU, with differences depending on age). [3] Retinol Activity Units can only be converted to IU (International Units) when the source of the vitamin A is known. [3] The IU values listed above do not apply to food sources of vitamin A. [3]
The international unit measurement was used by the United States in 1968–2016. 1 IU is the biological equivalent of about 0.667 mg d (RRR)-alpha-tocopherol (2/3 mg exactly), or of 0.90 mg of dl-alpha-tocopherol, corresponding to the then-measured relative potency of stereoisomers.
Although in the U.S. the adult UL is set at 4,000 IU/day, over-the-counter products are available at 5,000, 10,000 and even 50,000 IU (the last with directions to take once a week). The percentage of the U.S. population taking over 4,000 IU/day has increased since 1999.
recommended replacement for "μg" which may be confused with "mg" mdi metered dose inhaler m.d.u. more dicto utendus: to be used as directed mEq milliequivalent mg milligram mg/dL milligrams per deciliter MgSO4 magnesium sulfate: may be confused with "MSO4", spell out "magnesium sulfate" midi at midday min. minimum [or] minim [or] minutum
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There appears to be the greatest cluster of substances in the yellow part (μg/L or nmol/L), becoming sparser in the green part (mg/L or μmol/L). However, there is another cluster containing many metabolic substances like cholesterol and glucose at the limit with the blue part (g/L or mmol/L).