Hypervitaminosis A

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Obesity, Sleep & Internal medicine
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Hypervitaminosis A
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Nausea, headache, dizziness, blurred vision, skin peeling
Complications	Liver damage, osteoporosis, birth defects
Onset	Acute or chronic
Duration	Varies
Types	N/A
Causes	Excessive intake of Vitamin A
Risks	Pregnancy, liver disease, alcoholism
Diagnosis	Blood test, liver function test
Differential diagnosis	Hypercalcemia, pseudotumor cerebri
Prevention	Avoid excessive Vitamin A supplements
Treatment	Discontinuation of Vitamin A
Medication	N/A
Prognosis	Generally good with treatment
Frequency	Rare
Deaths	N/A

Vitamin A supplements, a common cause of Hypervitaminosis A.

Hypervitaminosis A refers to abnormally high storage levels of vitamin A in the body, leading to toxicity. This condition can cause a range of symptoms including headache, blurred vision, nausea, vomiting, and dizziness. In severe cases, it can also lead to birth defects.

Causes

The primary cause of Hypervitaminosis A is the excessive intake of vitamin A, either through diet or more commonly through overuse of supplements.

Dietary Sources

Foods rich in Vitamin A.

High intake of foods rich in vitamin A, such as liver, can contribute to elevated levels, though this is less common than supplement-induced toxicity.

Supplements

A bottle of Vitamin A supplements.

Overuse of vitamin A supplements is the most common cause of Hypervitaminosis A.

Symptoms

Symptoms of vitamin A toxicity include:

• Chronic symptoms: Liver damage, vision changes, osteoporosis, and skin changes
• Acute symptoms: Headache, blurred vision, nausea, vomiting, dizziness

Diagnosis

Diagnosis involves a review of dietary and supplement intake, blood tests to measure vitamin A levels, and assessment of symptoms.

Treatment

Treatment focuses on discontinuing excess vitamin A intake. In severe cases, medical intervention may be necessary.

Prevention

Prevention involves:

• Adhering to recommended dietary allowances for vitamin A
• Avoiding large doses of vitamin A supplements
• Being aware of vitamin A content in prescribed medications

External Links

• Mayo Clinic - Vitamin A
• NIH - Vitamin A Fact Sheet for Health Professionals