# arginine

/ˈɑːdʒɪnˌaɪn/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/arginine
Updated: 2026-05-30

## Definition

a type of amino acid that your body uses to build proteins. It also helps your body make nitric oxide, which is important for keeping your blood vessels healthy.

For teachers: an essential α-amino acid that is a precursor to nitric oxide and plays a role in the urea cycle. It is conditionally essential, meaning the body can usually produce it but may require dietary sources under certain stress conditions.

## Examples

- Arginine is often found in foods like nuts and seeds.
- Supplementing with arginine may help improve blood flow by increasing the production of nitric oxide in the body.
- While the liver typically synthesizes sufficient arginine for normal physiological functions, clinical studies suggest that patients with severe trauma or burns may benefit from exogenous supplementation to support tissue repair.

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