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Megavitamin-B6 syndrome, also known as hypervitaminosis B6, vitamin B6 toxicity, and vitamin B6 excess, [a] is a medical condition characterized by adverse effects resulting from excessive intake of vitamin B 6. [1][2][22] Primarily affecting the nervous system, this syndrome manifests through symptoms such as peripheral sensory neuropathy ...
Excessive consumption of vitamins. Hypervitaminosis is a condition of abnormally high storage levels of vitamins, which can lead to various symptoms as over excitement, irritability, or even toxicity. Specific medical names of the different conditions are derived from the given vitamin involved: an excess of vitamin A, for example, is called ...
Hypervitaminosis A refers to the toxic effects of ingesting too much preformed vitamin A (retinyl esters, retinol, and retinal). Symptoms arise as a result of altered bone metabolism and altered metabolism of other fat-soluble vitamins. Hypervitaminosis A is believed to have occurred in early humans, and the problem has persisted throughout ...
Dr. Tawadros says that stomach cramps and constipation can also be side effects of taking an iron supplement. He says that it can cause stools to look dark as well. “In regards to dark stool, I ...
Vitamin B 12 is the most chemically complex of all vitamins, [6] ... [56] [57] Injection side effects include skin rash, itching, chills, fever, hot flushes, nausea ...
“The use of red yeast rice can lead to side effects such as muscle pain and weakness,” says Zeba Faroqui, M.D., a rheumatologist based in Levittown, New York. “In some cases, it has been ...
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.
Vitamin products above these regulatory limits are not considered supplements and should be registered as prescription or non-prescription (over-the-counter drugs) due to their potential side effects. The European Union, United States and Japan establish ULs. [11] [59] [60]