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Updated: Jul 2, 2026

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
Published on: January 31, 2022
Potential liver damage associated with over-the-counter vitamin supplements
Ankur Sheth1, Ritu Khurana, Vikas Khurana
1Department of Gastroenterology, and R. Khurana is clinical fellow, Department of Rheumatology, Louisiana State University Health Sciences Center, Shreveport, LA, USA.
Excessive vitamin A intake from over-the-counter supplements can cause liver damage. Discontinuing high-dose vitamin A supplements led to significant improvement in a patient with cirrhosis.
Area of Science:
- Toxicology
- Hepatology
- Nutritional Science
Background:
- Over-the-counter (OTC) vitamin supplements are widely available and increasingly popular.
- Concerns exist regarding potential vitamin toxicity due to high intake levels.
- Dietary supplements can contain significantly high doses of vitamins, exceeding recommended daily allowances.
Observation:
- A case study involving a patient with cirrhosis is presented.
- The patient habitually ingested an OTC dietary supplement containing 13,000 micrograms of vitamin A daily.
- The patient experienced marked clinical improvement after discontinuing the supplement.
Findings:
- Long-term intake of high-dose vitamin A from OTC supplements can lead to liver damage, including cirrhosis.
- Discontinuation of the offending supplement resulted in reversal of liver damage markers.
- This case demonstrates a direct link between excessive vitamin A intake and hepatotoxicity.
Implications:
- Highlights the potential risk of liver damage from long-term use of OTC vitamin supplements.
- Underscores the need for increased awareness among healthcare providers and the public about vitamin toxicity.
- Suggests the importance of medical supervision for individuals taking high-dose vitamin supplements to prevent adverse health outcomes.
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