Vitamin poisoning, or hypervitaminosis, refers to a condition of high storage levels of vitamins, which can lead to toxic symptoms. The medical names of the different conditions are derived from the vitamin involved: an excess of vitamin A, for example, is called "hypervitaminosis A". The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ... // E00-E35 - Endocrine diseases (E00-E07) Disorders of thyroid gland (E00) Congenital iodine-deficiency syndrome (E01) Iodine-deficiency-related thyroid disorders and allied conditions (E02) Subclinical iodine-deficiency hypothyroidism (E03) Other hypothyroidism (E030) Congenital hypothyroidism with diffuse goitre (E031) Congenital hypothyroidism without goitre (E032) Hypothyroidism due to medicaments and other... // E00-E35 - Endocrine diseases (E00-E07) Disorders of thyroid gland (E00) Congenital iodine-deficiency syndrome (E01) Iodine-deficiency-related thyroid disorders and allied conditions (E02) Subclinical iodine-deficiency hypothyroidism (E03) Other hypothyroidism (E030) Congenital hypothyroidism with diffuse goitre (E031) Congenital hypothyroidism without goitre (E032) Hypothyroidism due to medicaments and other... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... Retinol (Vitamin A) Vitamins are nutrients required for essential metabolic reactions in the body [1]. Vitamins can act both as catalysts and participants in chemical reactions. ... Toxic redirects here, but this is also the name of a song by Britney Spears; see Toxic (song) Look up toxic and toxicity in Wiktionary, the free dictionary. ... The term symptom (from the Greek syn = con/plus and pipto = fall, together meaning co-exist) has two similar meanings in the context of physical and mental health: Strictly, a symptom is a sensation or change in health function experienced by a patient. ...

High dosage vitamin A, high dosage, slow release vitamin B₃ and very high dosage vitamin B₆ alone without vitamin B complex are sometimes associated with vitamin side effects that usually rapidly cease with supplement reduction or cessation. Conversely, certain vitamins do not produce toxicity in excess levels. Vitamin C has been used in dosages over 100,000 mg for serious illness^[1] — over 1000 times the daily recommended intake — without ill effects. Vitamin C does have a pronounced laxative effect, typically in the range of 5-20 grams per day for a person in normal "good health" ^[2]. Retinol, the dietary form of vitamin A, is a fat-soluble, antioxidant vitamin important in vision and bone growth. ... Niacin, also known as nicotinic acid or vitamin B3, is a water-soluble vitamin whose derivatives such as NADH play essential roles in energy metabolism in the living cell. ... Pyridoxine Vitamin B-6 is a water-soluble vitamin. ... 3D representation of vitamin C Chemical structure of vitamin C Vitamin C is a water-soluble nutrient and vitamin essential for life and for maintaining optimal health. ... The milligram (symbol mg) is an SI unit of mass. ... Recommended Dietary Allowance (RDA) is the daily dietary intake level of a nutrient that is considered sufficient to meet the requirements of nearly all (97-98%) healthy individuals in each life-stage and gender group. ...

High doses of mineral supplements can also lead to side effects and toxicity. Mineral supplement poisoning does occur occasionally due to excessive and unusual intake of iron containing supplements, including some multivitamins. Hypervitaminosis with multivitamins is uncommon. A multivitamin is any preparation containing more than a single vitamin. ...

Comparative safety statistics

Deaths by vitamin poisoning appear to be quite rare in the US, typically none in a given year. However before 1998, several deaths per year were typically associated with pharmaceutical iron-containing supplements, especially brightly-colored, sugar-coated, high-potency iron supplements, and most deaths were children[1]. Unit packaging restrictions on supplements with more than 30 mg iron have since reduced deaths to 0 or 1 per year[2]. These statistics compare with 59 deaths due to aspirin poisoning in 2003, 147 deaths associated with acetaminophen-containing products in 2003, and an average of 54 deaths per year due to lightning for 1990-2003.

See also

• Hypervitaminosis A
• Hypervitaminosis D
• Avitaminosis

The effects of excessive vitamin A intake include: birth defects liver abnormalities, reduced bone mineral density that may result in osteoporosis coarse bone growths hair loss excessive skin dryness/peeling Signs of acute toxicity include nausea and vomiting, headache, dizziness, blurred vision, and loss of muscular coordination. ... In terms of the likelihood of poisoning, Vitamin D seems to be one of the least poisonous substances known. ... Avitaminosis is any disease caused by chronic or long-term vitamin deficiency or caused by a defect in metabolic conversion, such as tryptophan to niacin. ...

References

1. ^ http://www.doctoryourself.com//titration.html
2. ^ Vitamin C, Titrating To Bowel Tolerance, Anascorbemia, And Acute Induced Scurvy Robert F. Cathcart, III, M.D. 1994