Fat-soluble vitamins (A, D, E, K)<\/strong> are stored in adipose tissue and the liver, so over time they can accumulate in dangerous concentrations. Although excess B vitamins and vitamin C are usually excreted in the urine, in high doses they also cause unwanted effects. Self-administration of vitamin complexes without a doctor's prescription<\/p>\n<\/li>\n Long-term use of supplements in high doses<\/p>\n<\/li>\n Combining different drugs with the same vitamin content<\/p>\n<\/li>\n Low nutrient requirements in the absence of deficiency<\/p>\n<\/li>\n<\/ul>\n Constant fatigue, drowsiness<\/p>\n<\/li>\n Nausea, abdominal pain, lack of appetite<\/p>\n<\/li>\n Itching, rash, brittle hair<\/p>\n<\/li>\n Visual disturbances, headaches<\/p>\n<\/li>\n Increased sensitivity to light<\/p>\n<\/li>\n Pain in bones and joints<\/p>\n<\/li>\n Sleep disturbance, irritability<\/p>\n<\/li>\n<\/ul>\n The most reliable method is biochemical blood test<\/strong>, which detects the concentration of specific vitamins (A, D<\/a>, E, B12<\/a> etc.). In some cases, urine tests are also used to assess the excretion of excess. It is also important to consider clinical symptoms - sometimes the manifestations of hypervitaminosis can mimic other conditions.<\/p>\n Excess balanced diet<\/strong> rarely causes hypervitaminosis. The main danger is in pharmacological drugs<\/strong>, dietary supplements and self-selected diets (for example, with excessive consumption of liver - a source of vitamin A). Particular caution should be exercised in pregnant women, children, people with chronic diseases<\/strong>.<\/p>\n Dosage control, doctor's advice, and periodic diagnostics are the best way to avoid hypervitaminosis. Remember: even vitamins are medicines that require a responsible approach.<\/p>","protected":false},"excerpt":{"rendered":" In the pursuit of health, we often forget that excessive consumption of even the most useful substances can be harmful. Vitamins are vital<\/p>","protected":false},"author":627,"featured_media":9765,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9764","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/posts\/9764","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/users\/627"}],"replies":[{"embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/comments?post=9764"}],"version-history":[{"count":0,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/posts\/9764\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/media\/9765"}],"wp:attachment":[{"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/media?parent=9764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/categories?post=9764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/medilab.km.ua\/en\/wp-json\/wp\/v2\/tags?post=9764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Vitamin A (retinol<\/a>)<\/strong> \u2014 excess causes headaches, nausea, skin irritation, and in pregnant women \u2014 the risk of fetal pathologies.
Vitamin D<\/strong> \u2014 hypervitaminosis can cause vascular calcification, heart and kidney dysfunction.
Vitamin E<\/strong> \u2014 in large doses, it affects blood clotting and may increase the risk of stroke.
Vitamin K<\/strong> \u2014 rarely causes toxicity, but excess can contribute to blood thickening when taken simultaneously with anticoagulants.<\/p>\nWater-soluble vitamins are less dangerous, but not safe<\/strong><\/h2>\n
Vitamin B6<\/strong> \u2014 in large doses, it can damage nerve fibers, causing tingling and muscle weakness.
Vitamin C<\/strong> \u2014 with prolonged intake of more than 2 g per day, stomach upset, kidney stones, and impaired absorption of other microelements are possible.
Vitamin B3 (niacin)<\/strong> \u2014 causes flushing, liver damage in excess.<\/p>\nWhy does hypervitaminosis occur?<\/strong><\/h2>\n
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Symptoms that should alert you<\/strong><\/h2>\n
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![\"blood](\"https:\/\/medilab.km.ua\/wp-content\/uploads\/2025\/05\/888-1.jpg\")
<\/p>\nHow is vitamin excess diagnosed?<\/strong><\/h2>\n
Is it possible to get poisoned by natural sources of vitamins?<\/strong><\/h2>\n