To put it simply for Vitamin D3 1 IU = 0.025 _g (micrograms), so 400 IU is 10 _g. To convert it to milligrams divide it by a thousand. Therefore 400 IU is 0.01 mg regards Vitamin D3.
I say regards Vitamin D3 as the unit equals different amounts between different types of substances.
IU or International Unit measures biological activity, or effect, of a substance and is used primarily in pharmacology. You may also see it listed as UI (French unit internationale or Italian unit internazionale), or as IE (German Internationale Einheit). IU has the advantage over a measure of mass, as milligram (mg), in being consistent in nominal quantity across various forms of a biological agent. Despite its name, IU is not part of the International System of Units used in physics and chemistry.
The majority of the time fat soluble vitamins are listed in international units (IU).
In the US the Dietary Reference Intake for vitamin D is 600 IU/day (or 15 _g equivalent) for people 1-70 years of age. The upper level intakes for vitamin D are 4,000 IU (100 _g or 0.1mg) for anybody above the age of nine years-old and of normal health.
In healthy adults, sustained intake of more than 1250 _g a day (50,000 IU) can produce overt toxicity after several months.
Natural dietary sources of vitamin D include fatty fish species (Catfish, Salmon, Mackerel, Sardines, Tuna and Eel), eggs and Beef liver.
If you have any concerns or are concerned about how much you should intake, please consult your local pharmacist, who will be more than happy to assist.
I say regards Vitamin D3 as the unit equals different amounts between different types of substances.
IU or International Unit measures biological activity, or effect, of a substance and is used primarily in pharmacology. You may also see it listed as UI (French unit internationale or Italian unit internazionale), or as IE (German Internationale Einheit). IU has the advantage over a measure of mass, as milligram (mg), in being consistent in nominal quantity across various forms of a biological agent. Despite its name, IU is not part of the International System of Units used in physics and chemistry.
The majority of the time fat soluble vitamins are listed in international units (IU).
In the US the Dietary Reference Intake for vitamin D is 600 IU/day (or 15 _g equivalent) for people 1-70 years of age. The upper level intakes for vitamin D are 4,000 IU (100 _g or 0.1mg) for anybody above the age of nine years-old and of normal health.
In healthy adults, sustained intake of more than 1250 _g a day (50,000 IU) can produce overt toxicity after several months.
Natural dietary sources of vitamin D include fatty fish species (Catfish, Salmon, Mackerel, Sardines, Tuna and Eel), eggs and Beef liver.
If you have any concerns or are concerned about how much you should intake, please consult your local pharmacist, who will be more than happy to assist.
