Vitamin A is a fat-soluble vitamin, a category that also includes vitamins D, E and K. The vitamin encompasses several chemically related naturally occurring compounds or metabolites, i.e., vitamers, that all contain a β- ionone ring. [4]

2022年11月9日 · Vitamin A strengthens your immune system by supporting white blood cells and the mucus membranes in your lungs, intestines and urinary tract. This helps you ward off infection and toxins (also called free radicals) that cause inflammation and disease.

Vitamin A (retinol, retinoic acid) is a nutrient important to vision, growth, cell division, reproduction and immunity. Vitamin A also has antioxidant properties.

2024年4月1日 · Vitamin A is a critical fat-soluble vitamin that helps maintain vision, body growth, immune function, and reproductive health. Eating enough foods containing vitamin A can help prevent...

2023年4月24日 · Vitamin A is a fat-soluble nutrient that plays a vital role in your body. This article discusses vitamin A, including its benefits, food sources of the vitamin, and the effects of...

Vitamin A is a fat -soluble vitamin. Its different forms are often called "retinoids." They include retinol, retinal, retinoic acid, and retinyl ester. Vitamin A is needed for the proper...

The evidence suggests that eating a variety of foods rich in vitamin A, especially fruits and vegetables, is protective from certain diseases, though the health benefit of vitamin A supplements is less clear.

2022年5月23日 · Vitamin A deficiency happens when your body doesn’t get enough vitamin A. Diet lacking in vitamin A and certain disorders can cause vitamin A deficiency. Symptoms include vision issues such as night blindness.

Vitamin A is found in a variety of foods, including green, orange, and yellow vegetables, such as broccoli, carrots, and squash. What are vitamin A and carotenoids and what do they do?

3 天之前 · A local medical official is warning against the unsupervised use of vitamin A to treat measles as Texas sees a growing number of cases. Here's what to know.