alanine

noun

al·​a·​nine ˈa-lə-ˌnēn 

: a simple nonessential crystalline amino acid C₃H₇NO₂

Examples of alanine in a Sentence

Recent Examples on the Web

Pre-workout supplements can support energy, strength, and endurance, thanks to ingredients like caffeine and beta-alanine. —Sherri Gordon, Health, 13 Mar. 2026

The beta-alanine also provides a mild boost, and creatine supports strength gains over time. —Bestreviews, Chicago Tribune, 3 Feb. 2026

Other ingredients, such as creatine and beta-alanine, may remain in the body longer but do not cause stimulation and are unlikely to be felt after a workout ends. —Morgan Pearson, Verywell Health, 21 Jan. 2026

The cyanobacterial toxin β-N-methylamino-L-alanine (BMAA), as well as its isomers 2,4-diaminobutyric acid (2,4-DAB), and N-2-aminoethylglycine (AEG), have been found to be extremely toxic to neurons. —Maria Azzurra Volpe, MSNBC Newsweek, 3 Oct. 2025

Word History

Etymology

German Alanin, irregular from Aldehyd aldehyde

First Known Use

1850, in the meaning defined above

Kids Definition

alanine

noun

al·​a·​nine ˈal-ə-ˌnēn 

: an amino acid formed especially by the breakdown of proteins

Medical Definition

alanine

noun

al·​a·​nine ˈal-ə-ˌnēn 

: a simple nonessential crystalline amino acid C₃H₇NO₂ formed especially by the hydrolysis of proteins

—abbreviation Ala