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With few exceptions, like some vitamins from B-complex, hypervitaminosis usually occurs with the fat-soluble vitamins A and D, which are stored, respectively, in the liver and fatty tissues of the body. These vitamins build up and remain for a longer time in the body than water-soluble vitamins. [2] Conditions include: Hypervitaminosis A
[15] [4] [10] [12] [7] It is also possible that some individuals are more susceptible to the toxic effects of vitamin B 6 than others. [4] Megavitamin-B 6 syndrome has been reported in doses as low as 24 mg/day. [34] Symptoms may also be dependent on the form of vitamin B 6 taken in supplements.
A 2024 poll from the Council for Responsible Nutrition (CRN), a dietary supplement trade association, suggests usage is even higher, with 75% of U.S. adults 18 and older taking dietary supplements.
Rare, occurring as a consequence of abnormalities in dietary fat absorption or metabolism, such as a defect in the alpha-tocopherol transport protein, rather than from a diet low in vitamin E. Vitamin K deficiency: Signs and symptoms can include sensitivity to bruising, bleeding gums, nosebleeds, and heavy menstrual bleeding in women. [50] [51]
Be cautious about taking dietary supplements if you are pregnant or nursing. Also, be careful about giving supplements to a child, unless recommended by their healthcare provider. You Might Also Like
“Some dietary supplements make claims that are either not well substantiated or have no data to back up the specific claim,” says Marilyn Schorin, PhD, RDN, a dietitian in Louisville, Kentucky ...
Cod liver oil, a potentially toxic source of vitamin A. Hypervitaminosis A can result from ingestion of too much vitamin A from diet, supplements, or prescription medications. Hypervitaminosis A results from excessive intake of preformed vitamin A. Genetic variations in tolerance to vitamin A intake may occur, so the toxic dose will not be the ...
If you're taking any of these supplements in combination, “consider alternating or lowering the doses to avoid stacking their effects,” recommends Simpson. Related: The 7 Best Omega-3 ...