: a white crystalline essential amino acid C6H13NO2 that is obtained by the hydrolysis of dietary protein (as of eggs, soy, or fish) and plays an important role in various physiological functions (as the regulation of insulin secretion and stimulation of protein synthesis in skeletal muscle)
Examples of leucine in a Sentence
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There’s also astaxanthin combined with glutamine and leucine—amino acids that may also play a role in exercise recovery.
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Isabel Vasquez Rd Ldn, Verywell Health, 9 July 2024
This product, from Optimum Nutrition, delivers that plus a hearty 24 grams of protein per serving, including 3 grams of leucine.
—Jenny McCoy, Glamour, 8 July 2024
Studies show that eating cheddar can help increase blood levels of amino acids like leucine and promote muscle growth.14
Try adding cheddar to salads and sandwiches or pairing cheddar with fresh fruit and nuts for a filling snack.
5.
—Jillian Kubala, Health, 1 July 2024
The name refers to amino acids involved in two new mutations on the virus’s spike protein: phenylalanine (F), leucine (L), arginine (R) and threonine (T).
—Lauren J. Young, Scientific American, 5 June 2024
See all Example Sentences for leucine 
Isabel Vasquez Rd Ldn, Verywell Health, 9 July 2024
This product, from Optimum Nutrition, delivers that plus a hearty 24 grams of protein per serving, including 3 grams of leucine.
—Jenny McCoy, Glamour, 8 July 2024
Studies show that eating cheddar can help increase blood levels of amino acids like leucine and promote muscle growth.14
Try adding cheddar to salads and sandwiches or pairing cheddar with fresh fruit and nuts for a filling snack.
5.
—Jillian Kubala, Health, 1 July 2024
The name refers to amino acids involved in two new mutations on the virus’s spike protein: phenylalanine (F), leucine (L), arginine (R) and threonine (T).
—Lauren J. Young, Scientific American, 5 June 2024
See all Example Sentences for leucine
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“Leucine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leucine. Accessed 2 Nov. 2024.
Copy CitationKids Definition
leucine
noun
leu·cine
ˈlü-ˌsēn 
: an amino acid that is very important in the nutrition of human beings
Medical Definition
leucine
noun
leu·cine
ˈlü-ˌsēn
: a white crystalline essential amino acid C6H13NO2 obtained by the hydrolysis of most dietary proteins
—abbreviation Leu
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