In human beings some essential amino acids are required.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Amino Acids**: Amino acids are the building blocks of proteins and play a crucial role in various biological processes. They are categorized into two types: essential amino acids and non-essential amino acids.

2. **Essential Amino Acids**: Essential amino acids are those that cannot be synthesized by the human body. This means that our body does not have the capability to produce them on its own.

3. **Source of Essential Amino Acids**: Since essential amino acids cannot be produced internally, they must be obtained through dietary sources. This includes various foods that we consume.

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