In the context of water-soluble vitamins, which vitamin is considered the most transient in the body (i.e., has minimal storage and requires regular dietary intake)?

• A. Vitamin C (ascorbic acid)
• B. Niacin (vitamin B3)
• C. Folate (vitamin B9)
• D. Vitamin B12 (cobalamin)

Answer: (A)

Verified step by step guidance

1. Understand that water-soluble vitamins generally have limited storage in the body and need regular replenishment through diet.
2. Recall that among the listed vitamins, Vitamin B12 is unique because it can be stored in the liver for a long time, sometimes years, so it is not the most transient.
3. Recognize that folate (vitamin B9) and niacin (vitamin B3) have some storage but are still water-soluble and require regular intake, though not as rapidly depleted as some others.
4. Identify that Vitamin C (ascorbic acid) is known for having minimal storage in the body and is rapidly used or excreted, making it the most transient water-soluble vitamin.
5. Conclude that because Vitamin C requires frequent dietary intake due to its minimal storage, it is considered the most transient among the options provided.