Question

The richest source of vitamin D is:

• A. Fish
• B. Soyabean
• C. Halibut liver oil
• D. Vegetables

Hint:

Concentrated fish liver oils outrank whole fish and plant foods for vitamin D.

Answer 1

The Correct Option is C

Step 1: Vitamin D is a fat-soluble vitamin found in highest concentration in fish liver oils. Among the listed options the most concentrated dietary source is halibut liver oil.

Step 2: Halibut liver oil contains far more vitamin D per gram than cod liver oil and ordinary fish, making it the richest natural food source of the vitamin.

Step 3: Whole fish do contain vitamin D but in much smaller amounts than the concentrated liver oil. Soyabean and vegetables are essentially poor sources because plant foods contain little to no preformed vitamin D. Therefore halibut liver oil is the answer.