Common Names: Retinol, Retinal, Retinoic acid, Tretinoin, Beta-carotene
Scientific Names: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraen-1-ol
Vitamin A is a fat-soluble essential nutrient that plays a vital role in maintaining various aspects of human health. It is well-known for its critical role in promoting good vision and eye health, particularly in the form of retinol, which is essential for the function of the retina. Vitamin A is also crucial for immune system function, helping the body defend against infections. Furthermore, it supports the health of the skin, respiratory and digestive systems, and is necessary for normal growth and development. Vitamin A is obtained through dietary sources, including animal products like liver and dairy, as well as from certain fruits and vegetables in the form of provitamin A carotenoids like beta-carotene. Supplementation is often recommended for individuals at risk of deficiency, such as those with specific dietary restrictions or certain medical conditions. While Vitamin A is vital for overall health, it's essential to be mindful of dosages, as excessive intake can lead to toxicity. Therefore, it's advisable to consult with a healthcare professional or nutritionist to determine the appropriate daily intake based on individual needs and health considerations.
The recommended daily dosage of Vitamin A in milligrams (mg) can vary based on age, sex, and specific health needs. For most adults, the recommended dietary allowance (RDA) of Vitamin A is approximately 900 micrograms (mcg) for men and 700 mcg for women, which is equivalent to 3,000 to 2,300 international units (IU) of retinol activity equivalents (RAE). However, it's crucial to consult with a healthcare professional or a qualified nutritionist to determine the exact dosage that suits your specific health requirements, as individual needs can differ. Vitamin A is readily available through a balanced diet that includes sources like liver, eggs, dairy products, and colorful fruits and vegetables. In cases where supplementation is necessary, it should be approached with caution, as excessive intake of Vitamin A can lead to toxicity and adverse health effects. It's essential to follow professional guidance and ensure that your intake aligns with your overall nutritional needs and health goals.