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Yeast Extract

Last reviewed October 19, 2026

In plain words: Yeast extract is a savory flavoring made from yeast. It contains glutamate, so US rules don't allow foods that contain it to claim "No MSG."

What the evidence review says

Yeast extract is a savory flavoring made from yeast. We found no notable concern at its normal flavoring use. It naturally contains glutamate, so US rules don't allow foods that contain it to claim 'No MSG.'

No notable toxicological concern at the affirmed flavoring use. It is not added monosodium glutamate, but it does contain free glutamate, so US labeling rules bar 'No MSG' and 'No added MSG' claims on foods that contain it. A group ADI for added glutamic acid and its salts does not apply to glutamate built into this ingredient.

Policy note: FDA has proposed a rule (not final) that would require companies to notify FDA before using a food substance on the basis that it is generally recognized as safe (GRAS). Comments close December 9, 2026. Source: 91 FR 51834, published August 11, 2026, Docket FDA-2025-N-3262 (federalregister.gov, checked 2026-10-19).

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This page is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 19, 2026.