2015年1月13日 · Vitamins are an important part of our diet, but you probably haven't given a great deal of thought to their chemical structures. This graphic shows chemical structures for all 13 vitamins; though there can be some variability in these structures in sources of the vitamins, these are generally representative. They perform a range of roles in…

Vitamins have been classified into two categories; fat soluble and water soluble. Fat soluble vitamins are vitamin A, D, E and K. water soluble vitamins are vitamin B complex (vitamins B1, B2, B3, B5, B6, B7, B9 and B12) and the vitamin C.

Vitamins are of different chemical nature. These are alcohols, aldehydes, organic acids, their derivatives and nucleotide derivatives. 1. Fat Soluble Vitamins: these are oily and hydrophobic compounds, they are stored in the liver and not excreted out of the body. Bile salts and fats are needed for their absorption.

2025年2月11日 · What are the two main groups of vitamins? Traditionally vitamins are separated into two groups, the water-soluble and the fat-soluble vitamins. The water-soluble vitamins are thiamin, riboflavin, niacin, vitamin B, folic acid, vitamin B, pantothenic acid, biotin, and vitamin C.

Vitamins are the essential nutrients that our body needs in small amounts. More specifically, an organic compound is defined as a vitamin when it is required by an organism, but not synthesised by that organism in the required amounts (or at all). There are thirteen recognised vitamins. Important for eyesight.

Vitamins are grouped together according to the following general biological characteristics: 1. Vitamins are not synthesized by the body and must come from food. An exception are vitamin B 3 (PP), which active form NADH (NADPH) can be synthesized from tryptophan and vitamin D 3 (cholecalciferol), synthesized from 7-

Currently, there are 13 recognised vitamins: vitamins A to E, including a range of B vitamins, and vitamin K. Generally, we can stick all of the vitamins into two broad categories. The fat soluble vitamins, vitamins A, D E, and K, can be stored by our bodies in the liver or in fatty tissues.

Six minerals are required by people in gram amounts: sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), phosphorus (P), and chlorine (Cl). Daily requirements range from 0.3 to 2.0 grams per day.

Vitamin E is composed of two major subgroups: tocopherol and tocotrienols, with each having four different fat-soluble isoforms: α-, β-, γ-and δ- [110]. ...

2024年4月1日 · Major health bodies have identified thirteen primary vitamins, including Vitamin A, B1, B2, B3, B5, B6, B7, B9, B12, C, D, E, and K. Additionally, some sources also recognize choline as a potential fourteenth vitamin. Delving deeper into their functions, vitamins play varied roles in biochemical processes.