Hello everyone, I'm sure many of them have heard of some vitamin A, but is vitamin A good for eyes and vision students, can A lack of vitamin A cause blindness, dha algal oil in milk and is taking too much vitamin A dangerous? How much do you know about these issues? Next, let's talk about the theoretical knowledge about vitamin A and beta-carotene that we have entered into today's topic of society.

What is vitamin A?

Vitamin A is actually a group of antioxidants that play an important role in vision, bone growth, and maintaining a healthy immune system. Vitamin a also helps the surface, mucous membranes, beta carotene coloring and skin of the eye effectively defend against bacteria and viruses, reducing the risk of eye infections, respiratory diseases, and other infectious diseases.

In general, vitamin A can be divided into two types depending on the food it comes from:

One is vitamin A from animal foods, also known as retinol. Cabio Biotech This "pre-formed" vitamin A can be used directly in the body. Foods rich in vitamin A include beef, chicken liver, whole milk, and cheese.

Another type of vitamin A obtained from various fruits and vegetables is in the form of "provitamin A" carotenoids, which need to be converted by the body into retinol after ingesting food. Foods rich in vitamin A procarotenoids include carrots, sweet potatoes, spinach, kale, and cantaloupe. Among them, beta-carotene is one of the most common and potent vitamin A carotenoids.

Vitamin A and beta-carotene are good for the eyes

Because vitamin A helps protect the surface of the eye (cornea), it is essential for good vision.

xerophthalmia

Studies have shown that vitamin A eye drops can be effective in treating dry eyes. In fact, one study found that over-the-counter lubricating eye drops containing vitamin A were just as effective at treating dry eyes as expensive prescription eye drops formulated specifically for dry eyes. Vitamin A eye drops have also been shown to be effective in treating a particular type of eye inflammation called limbal conjunctivitis.

Macular degeneration

Vitamin A, at least when used in conjunction with other antioxidant vitamins, may reduce the risk of vision loss from macular degeneration (AMD). In the Major Age-Related Eye Disease Study (AREDS) sponsored by the American Association of Ophthalmology, those with mild or moderate AMD who took A daily multivitamin, including vitamin A(such as beta-carotene), vitamin C, vitamin E, zinc, and copper, had a 25 percent lower risk of advanced AMD over six years.

Retinitis pigmentosa

The combination of vitamin A and lutein seems to work by slowing the loss of vision seen in patients with retinitis pigmentosa (RP). A four-year study analysis conducted by researchers at Harvard Medical School and a number of other prestigious corporate universities found that patients with retinitis pigmentosa disease who were consistently supplemented with vitamin A (15,000 IU) and lutein (12 mg) daily had a slower learning speed with their peripheral vision loss than those who did not take supplements.

Because beta-carotene first needs to be converted into vitamin A in the body, more research is needed to see if beta-carotene can provide benefits similar to those of animal retinol.

Stargart disease

Researchers at Columbia University Medical Center have found that the synthesis of A special form of vitamin A may slow the progression of Stuttgart's disease, a genetic eye disease that can cause severe blindness in young people, also known as juvenile macular degeneration.

When given to mice with the same genetic defect as Staggett's patients, this vitamin A suppressed the growth of A blob of deposits in the retina called "vitamin A dimer," which has been linked to degenerative changes and vision loss.

The National Eye Institute has awarded researchers A $1.25 million grant to further investigate the relationship between vitamin A dimer and various retinal degeneration, which could lead to new treatments for these diseases.

Vitamin A deficiency

Vitamin A deficiency is rare in corporate America, but common among the poor in our country in the developing economy. It is estimated that around 250,000 to 500,000 malnourished children worldwide develop blindness each year because of their vitamin A deficiency, which can also be prevented by following a proper diet.

One of the earliest symptoms of vitamin A deficiency is night blindness. In ancient Egypt, it was discovered that eating liver could cure night blindness, and it was later found to be rich in vitamin A.

Vitamin A deficiency can cause the cornea to become very dry, resulting in clouding of the eyes, corneal ulcers, and decreased vision. Vitamin A deficiency can also lead to retinal damage, which can also lead to blindness.

Since vitamin a also plays an important role in fighting infections and A healthy immune system, vitamin A deficiency can lead to death from respiratory and other infections.