Key Benefits
- Supports healthy vision and prevents night blindness
- Strengthens immune system response
- Promotes healthy skin cell turnover
- Essential for reproductive health
- Supports bone growth and development
What is Vitamin A?
Vitamin A is a fat-soluble vitamin that exists in two primary forms: preformed vitamin A (retinol) found in animal products, and provitamin A carotenoids (like beta-carotene) found in colorful fruits and vegetables. Your body converts beta-carotene into active vitamin A as needed.
Why Your Body Needs It
This essential nutrient plays a critical role in maintaining the health of your eyes, particularly the retina where light is converted into nerve signals. Beyond vision, vitamin A is fundamental for immune function, helping your body fight infections by maintaining the integrity of skin and mucous membranes—your first line of defense against pathogens.
Food Sources
Rich sources include beef liver, sweet potatoes, carrots, spinach, cantaloupe, and fortified dairy products. Orange and yellow vegetables are particularly high in beta-carotene.
Signs of Deficiency
Night blindness is often the first sign of deficiency. Other symptoms include dry skin, frequent infections, and impaired wound healing. Severe deficiency can lead to xerophthalmia, a condition that can cause permanent blindness.
Dosage Considerations
The recommended daily allowance is 900 mcg RAE for adult men and 700 mcg RAE for adult women. Because vitamin A is fat-soluble, excessive intake of preformed vitamin A can lead to toxicity. Beta-carotene, however, is generally safe as the body regulates its conversion.
Disclaimer: This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare provider before starting any new supplement regimen.