Too much vitamin A can be harmful. Even a single large dose — over 200,000 mcg — can cause: Nausea. Vomiting. Bone thinning. Liver damage. Headache. Diarrhea. Nausea. Skin irritation. Pain in the joints and bone. Birth defects.
How do you know if you have too much vitamin A?
Symptoms of Vitamin A Excess Most people with vitamin A toxicity have a headache and rash. Consuming too much vitamin A over a long period of time can cause coarse hair, partial loss of hair (including the eyebrows), cracked lips, and dry, rough skin.
What are 4 signs of vitamin A toxicity?
Symptoms and Signs of Vitamin A Toxicity Drowsiness, irritability, abdominal pain, nausea, and vomiting are common. Sometimes the skin subsequently peels. Early symptoms of chronic toxicity are sparsely distributed, coarse hair; alopecia of the eyebrows; dry, rough skin; dry eyes; and cracked lips.
What would happen if you had too much vitamin A?
Getting too much preformed vitamin A (usually from supplements or certain medicines) can cause severe headache, blurred vision, nausea, dizziness, muscle aches, and problems with coordination. In severe cases, getting too much preformed vitamin A can even lead to coma and death.
How much is too much of vitamin A?
The tolerable upper intake of 3,000 mcg of preformed vitamin A, more than three times the current recommended daily level, is thought to be safe. However, there is some evidence that this much preformed vitamin A might increase the risk of bone loss, hip fracture [9-11], or some birth defects.
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