viji sakthi

IntroductionVitamins are organic compounds needed in minute amounts that are essential for life. A vitamin must be in the diet or be synthesized by microorganisms in the digestive system and then absorbed by the host animal. Currently there are 14 recognized vitamins of which four are fat-soluble and ten are water-soluble, but not all animals require all 14 vitamins (Table 1). When an animal absor ...