Types of Amino Acids

Amino acids are the small building blocks that make up proteins.
Out of 20 commonly used amino acids, our body can make some by itself, but for the rest, we need to get them from food.

So, we divide amino acids into two types:

🧩 1. Non-Essential Amino Acids

Let’s first understand the name.

• “Non-essential” does not mean they are not important.
• It simply means that our body can make these amino acids on its own, so we don’t have to worry about getting them from food.

✅ Think of it this way:
Your body is like a factory, and for these 11 amino acids, the factory has the right machines (enzymes) to make them from other nutrients.

📋 List of Non-Essential Amino Acids:

1. Alanine
2. Arginine
3. Asparagine
4. Aspartic acid
5. Cysteine
6. Glutamic acid
7. Glutamine
8. Glycine
9. Proline
10. Serine
11. Tyrosine

👉 Real-life analogy:
Imagine you’re baking cookies. You already have flour, sugar, and butter at home (you can make cookies whenever you want). That’s like non-essential amino acids – your body already has the “ingredients” to make them.

🧩 2. Essential Amino Acids

Now let’s understand what “essential” means here.

• These amino acids cannot be made by your body.
• That’s why they are essential to get from your diet (through food).

✅ If we don’t eat enough of them, our body can’t build the proteins we need – and that can lead to weakness, poor growth, or illness.

📋 List of Essential Amino Acids:

1. Methionine
2. Valine
3. Tryptophan
4. Isoleucine
5. Leucine
6. Lysine
7. Threonine
8. Phenylalanine
9. Histidine (essential for babies only)

👉 Real-life analogy:
Back to the cookie example — now imagine you don’t have chocolate chips at home, and you can’t make them either. You have to buy them from the store every time you want to use them. That’s how essential amino acids work — we need to get them from food because our body can’t make them.