A vitamin (US /ˈvaɪtəmɪn/ and UK /ˈvɪtəmɪn/) is an organic compound and a vital nutrient that an organism requires in limited amounts. An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize the compound in sufficient quantities, and it must be obtained through the diet; thus, the term "vitamin" is conditional upon the circumstances and the particular organism. For example, ascorbic acid (one form of vitamin C) is a vitamin for humans, but not for most other animal organisms. Supplementation is important for the treatment of certain health problems, but there is little evidence of nutritional benefit when used by otherwise healthy people.
By convention the term vitamin includes neither other essential nutrients, such as dietary minerals, essential fatty acids, or essential amino acids (which are needed in greater amounts than vitamins) nor the great number of other nutrients that promote health, and are required less often to maintain the health of the organism. Thirteen vitamins are universally recognized at present. Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" refers to a number of vitamer compounds that all show the biological activity associated with a particular vitamin. Such a set of chemicals is grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A", which includes the compounds retinal, retinol, and four known carotenoids. Vitamers by definition are convertible to the active form of the vitamin in the body, and are sometimes inter-convertible to one another, as well.
Meosseukhage heullin miso
himeobsi chyeojin du eokkae
geumbangirado ul deutan
neoui moseubeul bwasseo
neodapji anke wae geureoni
na gateun aedo jalsaneunde
cheoeumbuteo jeonbu jaldoemyeon
jaemieobseo
(ja nae sonjapgo)
nunmul kotmul jjatdeon gireotdeon
bameun itgo ijen useo
sumchage dallin neoui jinannari itjanha (geu)
jinsimeun jeoldae baesin an hae
V I T A M I N neol wihan nae jageun seonmulhana
"nan neoui bitamin"
neol eungwonhalge
saranghae
neoui yeoljeongeul mideo
gatabuta geureon malhajin mara
niga wonhaneun ge jinjeong jilliya
ireokungjeoreokung neol heundeuneun mal
sanggwanhaji malgo miraeui neol bwa
haneureul hyanghae useum jitdeon
geu moseube nan banhaesseosseo
haemarkdeon geuttae neoro
doraga jwo
(ja nae sonjapgo)
nunmul kotmul jjatdeon gireotdeon
bameun itgo ijen useo
sumchage dallin neoui jinannari itjanha (geu)
jinsimeun jeoldae baesin an hae
neomeojimyeon eottae
dasi tuk teolgo eussya ireonaja
"nan neoui bitamin"
neol eungwonhalge
saranghae
neoui yeoljeongeul mideo
gatabuta geureon malhajin mara
niga wonhaneun ge jinjeong jilliya
sumi chal ttaen swieoga geurae
neomu geokjeonghajima urin
meon yeohaengui kkeuteseon tto
useul tenikka
(ja nunmul dakkgo)
kkeuteobsi pyeolchyeojin i heomhan
giri neol himdeulge haedo
da gwaenchanha
umcheuryeotdeon nalgaereul dasi jjuk pyeo (oh)
sesangeul jeonbu gajyeoboja
V I T A M I N neol wihan nae jageun
seonmulhana
nan hangsang ne pyeon "kkok gieokhaejwo"