Water soluble vitamins are not stored in the body in large quantities except:
**Core Concept**
Water-soluble vitamins are a group of essential nutrients that are not stored in the body in large quantities due to their rapid excretion. These vitamins are primarily used by the body immediately after consumption, and excess amounts are eliminated through urine. The exception to this rule is one specific water-soluble vitamin that is stored in the body.
**Why the Correct Answer is Right**
The correct answer is the water-soluble vitamin that is stored in the body in relatively large quantities. This vitamin is **Vitamin B12**, which is stored in the liver and other tissues. Vitamin B12 is essential for the synthesis of DNA, fatty acid, and amino acid metabolism. The storage mechanism of Vitamin B12 involves binding to a protein called transcobalamin II, which transports it to various tissues for utilization.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not applicable, as it is blank.
* **Option B:** This option is not correct, as Vitamin B1 (Thiamine) is not stored in the body in large quantities. It is rapidly excreted and requires continuous intake.
* **Option C:** This option is not correct, as Vitamin B6 (Pyridoxine) is also not stored in the body in large quantities. It is involved in various enzymatic reactions but is not stored like Vitamin B12.
**Clinical Pearl / High-Yield Fact**
One key point to remember is that water-soluble vitamins, except for Vitamin B12, are not stored in the body and require continuous intake. This is why deficiencies in these vitamins can occur rapidly if dietary intake is inadequate.
**Correct Answer:** C.