Why is use of aspartame limited to cold foods and drinks ?

Explanation

### Step-by-Step Solution:

1. **Understanding Aspartame**:
- Aspartame is an artificial sweetening agent that is commonly used in various food and drink products to provide sweetness without the added calories of sugar.

2. **Properties of Aspartame**:
- It is much sweeter than sugar, meaning only a small amount is needed to achieve the desired sweetness level.
- It has a negligible caloric count, making it a popular choice for those looking to reduce calorie intake.
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