Hepatotoxic (toxic to the liver) Vitamins and Supplements:
Many vitamins and supplements can cause damage to the liver depending on the dose. One study in the USA found that up to one third of the patients in a liver clinic used herbal remedies. One of the most hepatotoxic vitamins is Vitamin A and anyone taking vitamin A supplements should be aware that doses higher than 25,000 IU (international units) per day may be dangerous. Most multivitamin preparations contain 4,000 IU vitamin A, which is well within the safety range. One of the few supplements which has been shown to be beneficial to the liver but without any toxic effects is Milk Thistle (Silybum Marianum) and there is no evidence of toxicity related to the pure form of milk thistle. It is known to protect cells in our liver that is not damaged (Riley, 2001