Ingredient Information
Summary
Vitamin A is a fat-soluble nutrient essential for maintaining normal vision, immune function, and skin health. It is found in foods like liver, fish oils, and dairy products, as well as in plant-based sources such as carrots and sweet potatoes, which contain beta-carotene that the body converts into Vitamin A. This vitamin is crucial for those looking to support their eye health and immune system. Pregnant women, infants, and individuals with certain dietary restrictions may particularly benefit from ensuring adequate intake. However, it’s important to avoid excessive consumption, as high doses can be harmful. Always consult with a healthcare professional before starting any supplement regimen.
Key Facts
- Type: Vitamin
- Natural source: Liver, fish oils, dairy products
- Typical supplemental dose: 800 µg (100% NRV)
- Used for: Contributes to normal vision and immune function
- First discovered: 1913
What Is Vitamin A?
Vitamin A, also known as retinol, is a fat-soluble vitamin with the empirical formula C20H30O. It is classified as a retinoid and is commonly found in two forms: preformed vitamin A (retinol and retinyl esters) and provitamin A carotenoids (such as beta-carotene). Typically, vitamin A appears as a yellow, crystalline solid. It is sourced from animal products like liver and fish oils, or synthesised from carotenoids found in plant sources like carrots and sweet potatoes. Vitamin A contributes to normal vision, immune function, and skin health.
How It Works In The Body
Vitamin A contributes to normal vision, immune system function, and skin health. It helps maintain the surface tissues (epithelial cells) and is essential for the production of pigments in the retina of the eye. This vitamin also plays a role in cell growth and differentiation (specialisation).
Safety & Interactions
- Vitamin A is generally recognised as safe when consumed within recommended amounts.
- Pregnant women should avoid excessive intake, as high levels can cause birth defects.
- Individuals with liver disease should consult a healthcare professional before supplementing with Vitamin A.
- The UK upper intake level for Vitamin A is 1,500 µg (5,000 IU) per day for adults.
- Excessive consumption of Vitamin A can lead to toxicity, with symptoms such as nausea, dizziness, and even liver damage.
Always consult your health practitioner before taking nutritional supplements, especially if you are taking medication or are under medical supervision. You should not take supplements as a substitute for a varied balanced diet or healthy lifestyle.
FAQs
What is Vitamin A good for?
Vitamin A contributes to the maintenance of normal vision, skin, and immune system function.
How much Vitamin A do I need daily?
The recommended daily intake for adults is 700 µg for women and 900 µg for men.
Can I get too much Vitamin A?
Yes, excessive intake can lead to toxicity. It’s important not to exceed the recommended daily amount unless advised by a healthcare professional.
References
1. https://pubmed.ncbi.nlm.nih.gov/10637381/
The importance of vitamin A in nutrition.
2. https://pubmed.ncbi.nlm.nih.gov/16020684/
Effects of vitamin A supplementation on immune responses and correlation with clinical outcomes.
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC3936685/
What is vitamin A and why do we need it?
Our products that contain Vitamin A
Where next?
Information on this page is for educational purposes only and is not a substitute for personalised medical advice. Always consult a healthcare professional before making dietary changes or starting new supplements.