Taking folate supplements that exceed recommendations might mask deficiency of which nutrient?

• A. Magnesium
• B. Vitamin D
• C. Vitamin B12
• D. Calcium

Answer: (C)

Excess folate can mask a vitamin B12 deficiency by correcting the megaloblastic anemia that B12 deficiency causes, while the neurological damage from B12 deficiency continues unchecked. Folate supports red blood cell production, so blood tests and anemia symptoms may look normal even though B12–related nerve issues are developing. If the deficiency isn’t addressed, those nerve problems can become irreversible, making early detection important. Vitamin B12 status is particularly a concern for people with limited animal‑based foods, malabsorption, or aging. Because folate doesn’t fix the neurological aspects, the nutrient that is masked is vitamin B12.