How many essential amino acids are there that the human body cannot synthesize?

How many essential amino acids are there that the human body cannot synthesize?

Step 1: Understand what amino acids are. Amino acids are the building blocks of proteins.
Step 2: Learn the difference between essential and non-essential amino acids. Essential amino acids cannot be made by the body and must come from food.
Step 3: Identify how many essential amino acids there are. Research shows that there are 9 essential amino acids.
Step 4: Conclude that these 9 essential amino acids must be obtained from the diet because the body cannot synthesize them.

Essential Amino Acids – Essential amino acids are those that the human body cannot produce on its own and must be obtained through dietary sources.