My current recommendation when either yeast extract or autolyzed yeast extract is listed as an ingredient in foods NOT labeled gluten-free is to contact the manufacturer and ask whether spent yeast from beer manufacturing is the source.Hereâs whyâ¦.y current recommendation when either yeast extract or autolyzed yeast extract is listed as an ingredient in foods NOT labeled gluten-free is to contact the manufacturer and ask whether spent yeast from beer manufacturing is the source. Hereâs whyâ¦.
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Aspartate Aminotransferase (AST) An aspartate aminotransferase (AST) test measures the amount of this enzyme in the blood. AST is normally found in red blood cells, liver, heart, muscle tissue, pancreas, and kidneys. AST formerly was called serum glutamic oxaloacetic transaminase (SGOT). Low levels of AST are normally found in the blood. When body tissue or an organ such as the heart or liver is diseased or damaged, additional AST is released into the bloodstream. The amount of AST in the blood is directly related to the extent of the tissue damage. After severe damage, AST levels rise in 6 to 10 hours and remain high for about 4 days. The AST test may be done at the same time as a test for alanine aminotransferase, or ALT.