From which disease we suffer in lack of vitamin B? Write the system of the disease?

Write with full explanation

Dear Student

Vitamin B-complex: Vitamin B-complex performs a number of functions in the body. It is a collective group of vitamins. It includes vitamin B1, B2, B3, B5, B6 and B12


Vitamin B1: It helps to convert sugar and starch into energy. It also promotes digestion, strengthens heart muscles, promotes growth and prevents fatigue.

Vitamin B2: It helps in releasing energy to body cells and enables utilisation of fats, proteins and sugars.

Vitamin B3: It helps to maintain healthy digestive tract and nervous system.

Vitamin B5: It helps in the breakdown of fats and carbohydrates to release energy. It is also important for production of red blood cells and sex related hormones. 

Vitamin B6: It is helpful in amino acid metabolism. It also prevents skin disorders, retarded growth and convulsions.

Vitamin B7: It helps in converting food into glucose.

Vitamin B9: It helps in converting food into glucose and keeps baby inside the womb of mother healthy.

Vitamin B12: It promotes utilisation of fats, proteins and carbohydrates. It is also essential for formation of RBCs, nucleic acids and also prevents anaemia.

The following table summarizes the sources and deficiency diseases of vitamin B. 

Name of vitamins


Deficiency diseases

Vitamin B1

Yeast, milk, green vegetables and cereals

Beri beri

Vitamin B2

Milk, egg-white, liver,


Cheilosis, digestive disorders and burning sensation of the skin

Vitamin B6

Yeast, milk, egg yolk,

cereals and grams


Vitamin B12

Meat, fish, egg and


Pernicious anaemia


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Dear student,

Vitamin B deficiencies can lead to anemia, a condition where the bone marrow produces large abnormally shaped red blood cells that do not function properly.

Below listed are the symptoms of Anemia-
  • Easy fatigue and loss of energy.
  • Unusually rapid heart beat, particularly with exercise.
  • Shortness of breath and headache, particularly with exercise.
  • Difficulty concentrating.
  • Dizziness.
  • Pale skin.
  • Leg cramps.
  • Insomnia.


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