HealthAugust 1, 2026

methionine

muh-THY-uh-neen

Definition

An essential sulfur-containing amino acid that serves as a fundamental building block for proteins and plays a critical role in metabolic signaling and cellular function.

Etymology

The term is a chemical portmanteau derived from 'methyl' and 'thio-' (from the Greek 'theion' meaning sulfur), combined with the '-ine' suffix used for amino acids.

In the news

In the article, methionine is identified as a key amino acid that helps regulate metabolic pathways, such as mTOR, and its restriction is studied for potential links to improved metabolic health and aging.

Eating less protein may support healthier aging

Read the full article ↗

Bioengineer.org

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