Vitamins for SSC Exams: Vitamin A, B, C, D, E, K, Functions, Deficiency Diseases & Tricks

Vitamins are essential organic compounds required by the human body in small quantities to maintain proper growth, metabolism, immunity, and overall health. Since the body cannot produce most vitamins in sufficient amounts, they must be obtained through a balanced diet containing fruits, vegetables, dairy products, and other nutrient-rich foods. 

Each vitamin performs specific functions, from supporting vision and bone health to improving immunity and preventing deficiency-related diseases. Understanding the types, sources, functions, and deficiency symptoms of vitamins is important not only for maintaining good health but also for those preparing for biology and competitive examinations.

Also Read: Science Tissues Notes for SSC Exams

Classification of Vitamins by Solubility

Vitamins are categorised into two main groups based on how they dissolve:

• Water-Soluble Vitamins: These dissolve in water and are not stored in the body for long periods, requiring regular intake. Examples include Vitamin B complex and Vitamin C. (Memory Tip: Remember "BC" for Water-Soluble.)

• Fat-Soluble Vitamins: These dissolve in fat and can be stored in the body's fatty tissues and liver. Examples include Vitamin K, Vitamin E, Vitamin D, and Vitamin A. (Memory Tip: Remember "KEDA," like "कीड़ा" (insect) that will drown in fat/oil.)

Chemical Names of Vitamins

Understanding the chemical names of vitamins is important for competitive exams. Here are the key vitamins and their chemical names:

• Vitamin A: Retinol. (Memory Tip: Linked to रतौंधी (Night Blindness), so remember Retinol.)

• Vitamin B Complex:

• B1: Thiamine

• B2: Riboflavin

• B3: Niacin

• B5: Pantothenic Acid

• B6: Pyridoxine

• B7: Biotin

• B9: Folic Acid (Often given to pregnant women)

• B12: Cyanocobalamin (Contains cobalt)

• Vitamin C: Ascorbic Acid. Found abundantly in citrus fruits.

• Vitamin D: Calciferol. Associated with calcium absorption.

• Vitamin E: Tocopherol. Known for its role in reproductive health.

• Vitamin K: Phylloquinone. Essential for blood clotting. (Memory Tip: "Blood को फिल करना पड़ेगा" (Blood needs to be filled) -> Phylloquinone.)

Functions and Deficiency Diseases of Vitamins

Each vitamin performs specific functions in the body, and its deficiency can lead to various health issues.

Vitamin A (Retinol)

• Functions: Maintains healthy epithelial tissue and is beneficial for eyes.

• Deficiency: Causes Night Blindness, a condition affecting the cornea, and Xerophthalmia.

• Sources: Vegetables, carrots, fish liver oil, milk, cheese.

Vitamin B Complex

• Vitamin B1 (Thiamine)

• Deficiency: Causes Beriberi.

• Vitamin B2 (Riboflavin)

• Deficiency: Can lead to weight loss and dry skin.

• Vitamin B3 (Niacin)

• Deficiency: Causes Pellagra, also known as the Four D Syndrome, which is a skin disease.

• Vitamin B5 (Pantothenic Acid)

• Deficiency: Leads to skin diseases and premature greying of hair.

• Vitamin B6 (Pyridoxine)

• Deficiency: Can result in anaemia (blood deficiency).

• Vitamin B7 (Biotin)

• Functions: Aids in fat synthesis.

• Deficiency: Causes muscle pain.

• Vitamin B9 (Folic Acid)

• Functions: Helps in RBC (Red Blood Cell) formation.

• Deficiency: Causes anaemia.

• Vitamin B12 (Cyanocobalamin)

• Contains: Cobalt.

• Deficiency: Causes blood deficiency (anaemia).

• General Sources of Vitamin B: Milk, rice, green leafy vegetables, eggs, meat, sprouts.

Vitamin C (Ascorbic Acid)

• Deficiency: Causes Scurvy, characterised by bleeding gums.

• Sources: Lemon, orange, sweet lime, guava, amla (richest source), tomato, sprouted grains. It is found in citrus fruits.

Vitamin D (Calciferol)

• Functions: Essential for strong bones.

• Deficiency: Causes weak bones, Rickets in children (leading to bow-shaped legs), and Osteomalacia in adults (weakening of bone density).

• Synthesis: Ultraviolet (UV) rays from sunlight convert ergosterol in the body into Vitamin D. Short daily exposure to sunlight is beneficial.

Vitamin E (Tocopherol)

• Also known as the Reproductive Vitamin.

• Functions: Essential for reproductive functions.

• Deficiency: Can cause infertility and reduced reproductive capacity.

• Sources: Wheat, chickpeas, peas, green leafy vegetables.

Vitamin K (Phylloquinone)

• Functions: Essential for proper blood clotting. A normal clot forms in approximately 2-5 minutes. It helps the liver produce prothrombin, a crucial factor for clotting.

• Deficiency: Impairs blood clotting, leading to excessive bleeding.

Understanding Vitamins is important for SSC Exams and other competitive exams as questions are frequently asked from their functions, sources, and deficiency diseases. 

Learning key facts, chemical names, and memory tricks can make revision easier and improve accuracy. Regular practice and quick revision of vitamin-related concepts will help you confidently solve biology-based questions in exams.