Final answer:
A person not getting enough essential amino acids is likely to have a weakened immune system due to the body's inability to carry out proper synthesis of proteins required for healthy growth, repair, and immune function.
Step-by-step explanation:
If a person is not getting enough essential amino acids in his or her diet, the most likely outcome is Weakened immune system (C). Essential amino acids are critical for the biosynthesis of proteins, body repair, and maintenance of various physiological processes, including the immune response. Without adequate consumption of these nutrients, the body can't sustain healthy growth or repair itself effectively, which may lead to a range of health problems, including a weakened immune system and vulnerability to illness.
Protein calorie malnutrition or protein energy malnutrition is a condition that results when there is insufficient supply of dietary proteins, impairing the growth and repair of all cells in the body which can make a person sick and weak.
It is also worth noting that excessive intake of amino acids through supplements when the diet is already sufficient in protein does not confer additional benefits and may actually impair absorption of other essential amino acids, thus potentially contributing to nutritional imbalances.