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In the United States, a multivitamin/mineral supplement is defined as a supplement containing three or more vitamins and minerals that does not include herbs, hormones, or drugs, where each vitamin and mineral is included at a dose below the tolerable upper intake level as determined by the Food and Drug Board, and does not present a risk of ...
Daily vitamin B 6 tolerable upper limits for adults as established by the agency Agency Upper limit Notes Reference National Health Service (NHS) United Kingdom 10 mg/day [44] Norwegian Scientific Committee for Food and Environment (VKM) 25 mg/day In 2017 VKM proposed to raise this to 25 mg/day, it was previously 4.2 mg/day. [40]
Vitamins are useful in preventing and treating illnesses specifically associated with dietary vitamin shortfalls, but the conclusions of medical research are that the broad claims of disease treatment by advocates of megavitamin therapy are unsubstantiated by the available evidence.
Incorrect dosage can lead to many adverse, hard-to-guess effects, such as death, and varying degrees of deformation or other developmental problems. [ 39 ] It is recommended that parenteral nutrition administration begins after a period of natural nutrition so doctors can properly calculate the nutritional needs of the fetus .
Vitamin D compounds, specifically cholecalciferol (D3) and ergocalciferol (D2), are used in rodenticides due to their ability to induce hypercalcemia, a condition characterized by elevated calcium levels in the blood. This overdose leads to organ failure and is pharmacologically similar to vitamin D's toxic effects in humans.
Preformed vitamin A is fat-soluble and high levels have been reported to affect metabolism of the other fat-soluble vitamins D, [24] E, and K. The toxic effects of preformed vitamin A might be related to altered vitamin D metabolism, concurrent ingestion of substantial amounts of vitamin D, or binding of vitamin A to receptor heterodimers ...
Because water-soluble B vitamins are eliminated in the urine, taking large doses of certain B vitamins usually only produces transient side effects (only exception is pyridoxine). General side effects may include restlessness, nausea and insomnia. These side effects are almost always caused by dietary supplements and not foodstuffs.
[5] [6] It is a water-soluble vitamin. Side effects are minimal. [7] [8] At high doses, liver problems may occur. [7] Normal amounts are safe for use during pregnancy. [9] Nicotinamide is in the vitamin B family of medications, specifically the vitamin B 3 complex. [10] [11] It is an amide of nicotinic acid. [7]
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