Can you overdose on vitamins?

Many people mistakenly believe that vitamins are completely safe in any quantities because they are sold over-the-counter and are associated with health. However, it is quite possible to get an overdose and even serious poisoning from the uncontrolled intake of supplements, especially when it comes to fat-soluble compounds.

Vitamins are divided into water-soluble and fat-soluble, and the latter have the property of accumulating in the body's tissues. Fat-soluble vitamins include A, D, E, and K, the excess of which is not excreted in the urine, but is stored in the liver and adipose tissue, which can lead to intoxication.

Clear upper safe limits of intake have been established for specific micronutrients. For example, regular intake of vitamin A in doses above 10,000 international units is toxic to the body and dangerous, especially for pregnant women. Long-term intake of vitamin D in doses exceeding 4,000 international units per day without medical supervision can cause hypercalcemia and calcium deposition in soft tissues.

Water-soluble vitamins are excreted in excess by the kidneys, but this does not make megadoses safe for health. Excessive consumption of certain water-soluble vitamins creates a colossal burden on the excretory system and can cause side effects from the gastrointestinal tract or nervous system. Therefore, always strictly follow the recommended dosages.