Healthy human does not excrete out in his urine

Options

A. Glucose
B. Uric acid
C. Creatinine
D. B-complex vitamins

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which substance is not excreted in the urine of a healthy human. We need to analyze the options provided: glucose, uric acid, creatinine, and B complex vitamins.

2. **Analyzing Glucose**: In a healthy individual, glucose is typically present in urine at very low levels. However, if there is an excess of glucose in the blood (due to conditions like diabetes), it can lead to a condition called glycosuria, where glucose is excreted in higher amounts. Therefore, glucose can be present in urine, albeit in small quantities.

3. **Analyzing Uric Acid**: Uric acid is a waste product formed from the breakdown of purines, which are found in certain foods and are also produced by the body. The kidneys filter uric acid from the blood and excrete it in urine. Thus, uric acid is present in the urine of healthy individuals.

4. **Analyzing Creatinine**: Creatinine is a waste product produced from muscle metabolism. It is also filtered out by the kidneys and excreted in urine. Therefore, creatinine is also present in the urine of healthy humans.

5. **Analyzing B Complex Vitamins**: B complex vitamins are water-soluble vitamins. They are not stored in the body and are excreted through urine if they are not absorbed by the body. This can lead to bright yellow urine, especially due to riboflavin (B2). However, in a healthy individual, B complex vitamins are not typically present in urine as they are excreted in small amounts.

6. **Conclusion**: Based on the analysis, the substance that is not excreted in the urine of a healthy human is **B complex vitamins**.

**Final Answer**: B complex vitamins

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