Which vitamin is supplied from only animal source:: (A) Vitamin C, (B) Vitamin B7, (C) Vitamin B12, (D) Vitamin D
Answer is C. Ans. (c) Vitamin B12 Ref: Harrison's 19th ed. P 640* Vitamin B12 (Cobalamin) is synthesized solely by microorganisms.* In humans, the only source for humans is food of animal origin, e.g., meat, fish, and dairy products.* Vegetables, fruits, and other foods of nonanimal origin doesn't contain Vitamin B12 .* Daily requirements of vitamin Bp is about 1-3 pg. Body stores are of the order of 2-3 mg, sufficient for 3-4 years if supplies are completely cut off.