Dispensable amino acids is another name for non-essential amino acids — the amino acids the human body can synthesise for itself and therefore does not strictly need from food. Alanine, aspartic acid, glutamic acid, serine, and several others are built from metabolic intermediates as long as enough total nitrogen and energy are available. The term “dispensable” is the older nutritional vocabulary; modern usage prefers “non-essential,” though both describe the same group. The distinction matters because protein quality is judged on the indispensable — essential — amino acids the body cannot make: a protein source is complete only if it supplies those. Dispensable does not mean unimportant — these amino acids are vital building blocks — only that the body can manufacture them rather than depending on the diet.