essential amino acid

noun

: any of various amino acids that are required for normal health and growth in many vertebrates, are either not manufactured in the body or manufactured in insufficient quantities, are usually supplied by dietary protein, and include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine compare nonessential amino acid

Example Sentences

Recent Examples on the Web Getting the right mix of essential amino acids is important for muscle growth and recovery.6 No protein source contains all of the amino acids that the body needs. Claire Bugos, Verywell Health, 4 Apr. 2023 This provides adequate amounts of all essential amino acids to be a complete protein, and each serving has 20 grams of protein. Isabel Vasquez Rd Ldn, Health, 27 Mar. 2023 On the most fundamental level, tryptophan is an essential amino acid required to make many different proteins in the body. Alice Chi Phung, Discover Magazine, 26 Nov. 2013 Solaray L-Carnitine 500 mg Capsules are a great source of this essential amino acid that helps the body utilize fats for energy production. Amber Smith, Discover Magazine, 15 Jan. 2023 This essential amino acid can help treat premature ejaculation by delaying the conversion of histidine into histamine in your body. Dallas News, 23 Dec. 2022 One scoop of this powder provides 20 grams of protein with a complete essential amino acid profile. Jaclyn London, M.s., R.d., Good Housekeeping, 22 Nov. 2022 In addition, some nootropics help your body combat deficiencies by replenishing vital nutrients, like essential amino acid compounds and proteins. Dallas News, 23 Aug. 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'essential amino acid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1911, in the meaning defined above

Time Traveler
The first known use of essential amino acid was in 1911

Dictionary Entries Near essential amino acid

Cite this Entry

“Essential amino acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/essential%20amino%20acid. Accessed 9 Jun. 2023.

Kids Definition

essential amino acid

noun
: an amino acid that is necessary for proper growth of the animal body and that cannot be made by the body in sufficient amounts but must be obtained from food containing proteins

Medical Definition

essential amino acid

noun
: any of various alpha-amino acids that are required for normal health and growth, are either not manufactured in the body or manufactured in insufficient quantities, are usually supplied by dietary protein, and in humans include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine
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