Vitamin A The Eyes Need It

Vitamin A The Eyes Need It



Vitamin a​ the​ Eyes Need It
You may have heard from your grandma that eating carrots can improve you vision. That may not be exactly true,​ but carrots do contain something called provitamin a​ carotenoids. These are pigments in​ some plants that can be converted by the​ body into vitamin A,​ and vitamin a​ is​ important to​ your vision.
Vitamin a​ is​ also helpful to​ bone growth and your immune system. as​ with other vitamins,​ there are different forms of​ vitamin A. One of​ the​ forms that is​ most usable to​ the​ body is​ called retinol,​ and it​ can be found in​ liver,​ eggs,​ and milk. One of​ the​ most common provitamin a​ carotenoids that the​ body converts easily to​ retinol is​ beta carotene,​ and it​ is​ found in​ carrots,​ sweet potatoes,​ spinach,​ and cantaloupe. Vitamin a​ is​ also one of​ the​ vitamins often used to​ fortify breakfast cereals.
Vitamin a​ is​ fat soluble,​ which means that the​ body stores it,​ mostly in​ the​ liver. That also means that it​ is​ possible to​ build up toxic levels of​ it​ in​ the​ body. This rarely happens from food sources because as​ the​ body builds up supplies of​ vitamin A,​ it​ will slow down the​ processing of​ beta carotene conversion to​ vitamin A. When people do get vitamin a​ toxicity,​ it​ is​ usually from taking too much in​ supplemental,​ or​ pill,​ form. Toxic levels of​ vitamin a​ can cause liver problems,​ central nervous system problems,​ deterioration of​ bone density,​ and birth defects.
True deficiency of​ vitamin a​ is​ rare in​ the​ US,​ but common in​ countries where malnourishment is​ widespread. as​ mentioned earlier,​ vitamin a​ is​ important to​ the​ immune system and vision. This is​ because the​ body uses vitamin a​ to​ make various internal tissues,​ such as​ those lining the​ eye,​ lungs,​ and intestinal tract. When these linings are weakened by vitamin a​ deficiency,​ it​ is​ easier for harmful bacteria to​ penetrate them and thus,​ people with vitamin a​ deficiency are more prone to​ infections,​ illness,​ blindness,​ and respiratory problems.
Aside from the​ malnourished,​ other people who may be prone to​ vitamin a​ deficiency include those who consume large amounts of​ ​alcohol​ and those with certain metabolic disorders that affect how fat and other nutrients are absorbed by the​ body.
Some recent and ongoing studies involving vitamin a​ and beta carotene include investigations as​ to​ whether high amounts of​ vitamin a​ contribute to​ osteoporosis,​ and whether beta carotene can lower the​ risk of​ some forms of​ cancer.




You Might Also Like:




No comments:

Powered by Blogger.