GNMT (Glycine N-Methyltransferase) is an essential enzyme involved in methionine metabolism and liver detoxification. It helps regulate homocysteine levels by converting excess methionine into sarcosine, preventing harmful methionine accumulation and supporting liver health. Dysfunction of GNMT is linked to liver conditions such as fatty liver disease and liver cancer. Ongoing research emphasises GNMT’s protective role against liver toxicity and its potential as a marker for assessing liver health.