An essential amino acid or indispensable amino acid is an amino acid that cannot be synthesized de novo by the organism (usually referring to humans), and therefore must be supplied in the diet.
Read more about Essential Amino Acid: Essentiality Vs. Conditional Essentiality in Humans, Recommended Daily Amounts, Use of Essential Amino Acids, Essential Amino Acid Deficiency, Mnemonics
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“It is the business of thought to define things, to find the boundaries; thought, indeed, is a ceaseless process of definition. It is the business of Art to give things shape. Anyone who takes no delight in the firm outline of an object, or in its essential character, has no artistic sense.... He cannot even be nourished by Art. Like Ephraim, he feeds upon the East wind, which has no boundaries.”
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