As you may already know, the water soluble vitamins are vitamin C and all the vitamins B (called vitamin B complex). All the vitamins B work close together, so it is difficult to determine which one is missing. 

Before i start, it is important to explain few terms:

Metabolism - all the chemical reactions involved in maintaining the living state of cells and the organism. It is divided in two categories:

Catabolism - breaking down carbohydrates, fatty acids and proteins to produce energy,

Anabolism - building up components needed by the body. 

Ok, with this in mind, i will talk a bit about the functions of vitamin B complex:

- energy production (they are coenzymes in catabolic reactions)

- needed for healthy nerve conduction (muscle action)

-synthesis of important neurotransmitters (acetylcholine, dopamine, serotonin)

- fat synthesis (used in the myelin sheath of the nerve cell)

- convertor of the aminoacids  that make the proteins (enabling transfer of the methyl groups from one aminoacid to another, to convert aminoacids from one form to another, depending on the body needs), vital for DNA maintenance

- helping to convert fat and aminoacids into glucose

- needed to build haemoglobin

- vital for fatty acids synthesis, to make and control cholesterol

- needed to make melatonin (the sleep hormone)

- needed to make homocysteine (decrease chances of heart disease)

- working with antioxidants such as glutathione

- elimination of certain drugs, carcinogens and steroid hormones

As you can see, they are quite important in multiple vital processes. 

Next post i will start to write about vitamin C. 

Yours truly, 

George

P.S. If you are Romanian, you can also publish your post link in the Publish0x Romanian Community Facebook group for others to read it. 

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Disclaimer: This text is also re-published on my personal blogs, such as this one.