What do vitamins A B C D do?

Answer 1

Vitamin A

needed for:

• normal vision and enables the eys to see in dim light
• keeps lining of throat, air passages and digestive system moist and healthy
• keeps skin healthy
• helps in body growth

Vitamin B

Isn't really a thing. Instead, there are 8 or so unrelated compounds that are collectively grouped as "the B vitamins." Each of them has a distinct function, but they all have to do with cell metabolism. The numbering is wonky because other compounds have at times been included.

B1 - generation of energy from carbohydrates

B2 - energy production in the electron transport chain, the citric acid cycle

B3 - energy transfer reactions

B5 - oxidation of fatty acids and carbohydrates

B6 - metabolism of amino acids and lipids

B7 - metabolism of lipids, proteins and carbohydrates

B9 - cell division and the production of red blood cells

B12 - essential in the formation of nerve sheaths and has several other functions besides

Vitamin C

needed for:

• helps body absorb iron and make blood
• helps wounds to heal by helping to bind body cells together
• helps prevent infection
• helps keep skin healthy

Vitamin D

needed for:

• Enables bones and teeth to grow properly
• Helps body absorb calcium and phosphorus