Vitamin A toxicity can cause liver damage, bone loss, and birth defects. Learn the warning signs of hypervitaminosis A, safe upper limits by country, and what to do if you have taken too much.
Very high vitamin A (especially retinol) can cause liver injury, bone loss, and birth defects if taken during pregnancy.
| Standard | RDA | Upper Limit (UL) |
|---|---|---|
| US (FDA) | 900 mcg | 3000 mcg |
| EU (EFSA) | 900 mcg | 3000 mcg |
| AU (TGA) | 900 mcg | 3000 mcg |
| CN (CNS) | 800 mcg | 3000 mcg |
| JP (MHLW) | 900 mcg | 2700 mcg |
RDA = Recommended Dietary Allowance. UL = Tolerable Upper Intake Level. Exceeding the UL long-term may cause the toxicity symptoms described above.
Early signs include headache, nausea, dizziness, and blurred vision. Chronic overuse can lead to liver damage, bone pain, and hair loss. The UL is 3,000 mcg/day for adults.
Yes. While beta-carotene (from plants) is generally safe, retinol and preformed vitamin A from supplements and animal sources can cause toxicity at high doses. Avoid exceeding 3,000 mcg/day of preformed vitamin A unless directed by a doctor.
Scan your supplement labels with NutriAudit. Automatically calculate total intake from all sources and detect if you exceed safe limits.
Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.