VB17 是一個假造的名稱。其實根本就沒有這麽一種維生素

List of B vitamins[edit]

• Vitamin B₁ (thiamin)
• Vitamin B₂ (riboflavin)
• Vitamin B₃ (niacin or niacinamide)
• Vitamin B₅ (pantothenic acid)
• Vitamin B₆ (pyridoxine, pyridoxal, or pyridoxamine, or pyridoxine hydrochloride)
• Vitamin B₇ (biotin)
• Vitamin B₉ (folic acid)
• Vitamin B₁₂ (various cobalamins; commonly cyanocobalamin in vitamin supplements)

B vitamin molecular functions[edit]

Vitamin	Name	Structure	Molecular Function
Vitamin B1	Thiamin		Thiamin plays a central role in the generation of energy from carbohydrates. It is involved in RNA and DNA production, as well as nerve function. Its active form is a coenzyme called Thiamin pyrophosphate (TPP), which takes part in the conversion of pyruvate to acetyl Coenzyme A (CoA) in metabolism.[1]
Vitamin B2	Riboflavin		Riboflavin is involved in the energy production for the electron transport chain, the citric acid cycle, as well as the catabolism of fatty acids (beta oxidation)[2]
Vitamin B3	Niacin		Niacin is composed of two structures: nicotinic acid andnicotinamide. There are two co-enzyme forms of niacin: nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP). Both play an important role in energy transfer reactions in the metabolism of glucose, fat and alcohol.[3] NAD carries hydrogens and their electrons during metabolic reactions, including the pathway from the citric acid cycle to the electron transport chain. NADP is a coenzyme in lipid and nucleic acid synthesis.[4]
Vitamin B5	Pantothenic acid		Pantothenic acid is involved in the oxidation of fatty acids and carbohydrates. Coenzyme A, which can be synthesised from pantothenic acid, is involved in the synthesis of amino acids, fatty acids, ketones, cholesterol,[5] phospholipids, steroid hormones, neurotransmitters (such as acetylcholine), and antibodies.[6]
Vitamin B6	Pyridoxine		Pyridoxine is usually stored in the body as pyridoxal 5'-phosphate(PLP), which is the co-enzyme form of vitamin B6. Pyridoxine is involved in the metabolism of amino acids and lipids; in the synthesis of neurotransmitters [7] and hemoglobin, as well as in the production of nicotinic acid (vitamin B3).[8] Pyridoxine also plays an important role in gluconeogenesis.
Vitamin B7	Biotin		Biotin plays a key role in the metabolism of lipids, proteins and carbohydrates. It is a critical co-enzyme of four carboxylases: acetyl CoA carboxylase, which is involved in the synthesis of fatty acids from acetate; propionyl CoA carboxylase, involved in gluconeogenesis; β-methylcrotonyl CoA carboxylase, involved in the metabolism of leucin; and pyruvate CoA carboxylase, which is involved in the metabolism of energy, amino acids and cholesterol.[9]
Vitamin B8	Inositol		Inositol is a vitamin-like substance. It is found in many plants and animals. It can also be made in a laboratory. Inositol is used for diabetic nerve pain, panic disorder, high cholesterol, insomnia, cancer, depression, schizophrenia, Alzheimer’s disease, attention deficit-hyperactivity disorder (ADHD), autism, promoting hair growth, a skin disorder called psoriasis, and treating side effects of medical treatment with lithium. Inositol is also used by mouth for treating conditions associated with polycystic ovary syndrome, including failure to ovulate; high blood pressure; high triglycerides; and high levels of testosterone.[10]
Vitamin B9	Folic Acid		Folic acid acts as a co-enzyme in the form of tetrahydrofolate (THF), which is involved in the transfer of single-carbon units in the metabolism of nucleic acids and amino acids. THF is involved in pyrimidine nucleotide synthesis, so is needed for normal cell division, especially during pregnancy and infancy, which are times of rapid growth. Folate also aids in erythropoiesis, the production of red blood cells.[11]
Vitamin B12	Cobalamin		Vitamin B12 is involved in the cellular metabolism of carbohydrates,proteins and lipids. It is essential in the production of blood cells in bone marrow, nerve sheaths and proteins.[12] Vitamin B12 functions as a co-enzyme in intermediary metabolism for the methionine synthase reaction with methylcobalamin, and the methylmalonyl CoA mutase reaction with adenosylcobalamin.[13

所有跟帖： 

• 嗬嗬,我還在老黃曆裏......試了一下,真的可以自己改標題呢.謝謝! -閩姑- ♀ (0 bytes) () 07/31/2014 postreply 07:56:38

• 缺乏基本常識，沒辦法～～～：）不過這種貼現在就是發在國內的天涯和豆瓣上，也沒什麽人理，就是在微信上亂轉～ -美妙- ♀ (0 bytes) () 07/31/2014 postreply 07:57:06

• 是嘛,天涯和豆瓣人的素質提高了?還是都轉去玩微信? -閩姑- ♀ (0 bytes) () 07/31/2014 postreply 09:02:21

• 是冷飯了，又被不同的微信公共平台抄了轉發。 -美妙- ♀ (0 bytes) () 07/31/2014 postreply 11:17:04

• “假造”有點誇張，應為曾經的VB家族成員 -好好先生*- ♂ (3196 bytes) () 07/31/2014 postreply 10:47:18

• B17 是Krebs 的推銷行為。 -26484915- ♂ (347 bytes) () 07/31/2014 postreply 12:07:54