Will eating carrots improve and cure my vision?!


Question:

Will eating carrots improve and cure my vision?

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Answers:

Eating carrots will not cure bad vision but it will improve it. Carrots have a large supply of Vitamin A which helps vision. Vitamin A is a pale yellow primary alcohol derived from carotene. It affects the formation and maintenance of skin, mucous membranes, bones, and teeth, vision and reproduction. In addition dietary Vitamin A, in the form of beta carotene, an antioxidant, may help reduce the risk of certain cancers. However, beta carotene is much more than the precursor for vitamin A.
Only so much beta carotene can be changed into vitamin A, and that which is not changed contributes to boosting the immune system and is also a potent antioxidant.
Antioxidants fight free radicals and help prevent them from causing membrane damage, DNA mutation, and lipid (fat) oxidation, all of which may lead to many of the diseases that we consider "degenerative." Exposure to sunlight, cigarette smoke and air pollution, along with your body's every day cellular activities, cause free radicals to form. It is free radical havoc that scientists believe is pivotal in the development of age related degenerative diseases such as cancer, cataracts, arthritis, heart disease an even asthma. It is highly recommended that vitamin A be consumed from the diet rather than from supplements (particularly in the case of beta carotene), because vitamin A obtained from a varied diet offers the maximal potential of health benefits that supplements cannot. Vitamin A is found in a variety of dark green and deep orange fruits and vegetables, such as carrots, sweet potatoes, pumpkin, spinach, butternut squash, turnip greens, bok choy, mustard greens, and romaine lettuce. Beta carotene is the most active carotenoid (the red, orange, and yellow pigments) form of vitamin A, but it is inefficiently absorbed and converted to retinol in comparison to vitamin A from animal sources. As you can see Vitamin A intake is essential to human health. For thousands of years, liver has been used as a cure for night blindness but it was only in the early part of the 20th century that researchers discovered that it is a rich source of vitamin A, which is essential for healthy eyes. The value of certain foods in maintaining health was recognised long before the first vitamins were actually identified. In the 18th century, for example, it had been demonstrated that the addition of citrus fruits to the diet would prevent the development of scurvy. In the 19th century it was shown that substituting unpolished for polished rice in a rice-based diet would prevent the development of beriberi.

In 1906 the British biochemist Frederick Hopkins demonstrated that foods contained necessary "accessory factors" in addition to proteins, carbohydrates, fats, minerals, and water. In 1911 the Polish chemist Casimir Funk discovered that the anti-beriberi substance in unpolished rice was an amine (a type of nitrogen-containing compound), so Funk proposed that it be named vitamine for "vital amine." This term soon came to be applied to the accessory factors in general. It was later discovered that many vitamins do not contain amines at all. Because of its widespread use, Funk's term continued to be applied, but the final letter e was dropped.

In 1912 Hopkins and Funk advanced the vitamin hypothesis of deficiency, a theory that postulates that the absence of sufficient amounts of a particular vitamin in a system may lead to certain diseases. During the early 1900s, through experiments in which animals were deprived of certain types of foods, scientists succeeded in isolating and identifying the various vitamins recognised today.

Elmer V. McCollum and M. Davis discovered vitamin A during 1912–1914. In 1913, Yale researchers, Thomas Osborne and Lafayette Mendel discovered that butter contained a fat-soluble nutrient soon known as vitamin A. Vitamin A was first synthesized in 1947.

In 1912 E V McCollum from Wisconsin University developed an approach which opened the way to the discovery of all nutrients - the use of rats, because they were easy to maintain, inexpensive and could give quick results. Rats fed butter were healthier than those fed lard; butter contains more vitamin A.

Using rats he discovered the first vitamin - A it was first called "fat soluble A".
In 1930 the structure of vitamin A was determined, and five years later it was found to be necessary for normal vision. In the years that followed, researchers started to study the vital role vitamin A plays in growth, development and reproduction.
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