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Vitamin A hepatotoxicity: a cautionary note regarding 25,000 IU supplements
T E Kowalski1, M Falestiny, E Furth
1Gastroenterology Division, Hospital of the University of Pennsylvania, School of Medicine, Philadelphia.
The American Journal of Medicine
|December 1, 1994
Summary
High doses of vitamin A supplements can cause liver damage, even at 25,000 IU daily. Healthcare providers should inquire about vitamin A intake in patients with liver issues.
Area of Science:
- Toxicology
- Hepatology
- Nutritional Science
Background:
- Vitamin A is essential for vision, immune function, and cell growth.
- Recommended daily intake varies, but toxicity is typically associated with chronic excessive consumption.
- High-dose vitamin A supplements are widely available over-the-counter.
Observation:
- A case of severe hepatotoxicity is presented.
- The patient habitually ingested 25,000 IU of vitamin A daily from an over-the-counter supplement.
- Elevated liver enzymes are possible at this dose, but severe toxicity is considered rare.
Findings:
- Daily intake of 25,000 IU of vitamin A from a dietary supplement led to severe hepatotoxicity.
- This case highlights that even doses previously considered safe may pose a risk.
- The risk may be underestimated with readily available high-dose supplements.
Implications:
- Healthcare professionals must be vigilant regarding potential vitamin A toxicity.
- A detailed vitamin A intake history is crucial for patients presenting with liver dysfunction.
- Increased awareness and patient education are needed regarding safe vitamin A supplementation levels.