Saturated fatty acid that reduces oil quality

Options

A. Palmitic acid
B. Stearic acid
C. Erucic acid
D. All the above.

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for a saturated fatty acid that reduces oil quality.

2. **Understand Saturated Fatty Acids**: Saturated fatty acids are types of fats that have no double bonds between the carbon atoms. They are typically solid at room temperature and can impact the quality of oils.

3. **Consider Common Saturated Fatty Acids**: Some common saturated fatty acids include palmitic acid, stearic acid, and lauric acid. However, we need to identify one that specifically reduces oil quality.

4. **Research Erucic Acid**: Erucic acid is a saturated fatty acid that is known to be present in certain oils, particularly those derived from the Brassica family, such as rapeseed oil.

5. **Evaluate the Effects of Erucic Acid**: While erucic acid can be safe in small doses, higher levels can be harmful. Research indicates that long-term exposure to high levels of erucic acid may lead to health issues, including myocardial lipidosis.

6. **Conclusion**: Based on the information gathered, the saturated fatty acid that reduces oil quality is erucic acid.

### Final Answer:
The saturated fatty acid that reduces oil quality is **erucic acid**.

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