Question:
Which of the following is the richest source of vitamin B12?
Which of the following is the richest source of vitamin B12?
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B12 comes only from animal products, never from plant oils or greens.
Updated On: Jun 23, 2026
- Meat
- Green leafy vegetables
- Corn oil
- Sunflower oil
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The Correct Option is A
Solution and Explanation
Step 1: Vitamin B12 (cobalamin) is synthesised by microorganisms and reaches humans through animal foods. It is found in meat, liver, fish, poultry, eggs, milk and milk products.
Step 2: Plant foods, including green leafy vegetables, do not naturally contain B12, so option b is out. Corn oil and sunflower oil are pure fats and carry no B12 either.
Step 3: Meat (especially liver) is therefore the richest natural source among the options. Strict vegetarians depend on fortified cereals or supplements to meet their B12 needs.
Ref: DM Vasudevan, Textbook of Biochemistry for Medical Students, 6th edn, pg 404.
Step 2: Plant foods, including green leafy vegetables, do not naturally contain B12, so option b is out. Corn oil and sunflower oil are pure fats and carry no B12 either.
Step 3: Meat (especially liver) is therefore the richest natural source among the options. Strict vegetarians depend on fortified cereals or supplements to meet their B12 needs.
Ref: DM Vasudevan, Textbook of Biochemistry for Medical Students, 6th edn, pg 404.
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