Is Methionine vegetarian?

Methionine is an essential amino acid required for protein synthesis in humans, and also serves as a precursor to cysteine and the methylation agent S-adenosylmethionine (SAM). It is naturally found in a wide range of protein-containing foods. It can be produced synthetically or via fermentation, but is also sourced from animal-derived proteins such as egg albumin and casein, making its vegan status dependent on the production source.

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.