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¦.
ASNT Community is the go-to site for NDT professionals to learn, network, and advance their profession, while also building upon the body of knowledge and strong traditions of ASNT.
Aspartate transaminase (AST) is an enzyme produced in the liver. It plays an important role in amino acid metabolism. It is normally found in the liver, heart, muscles, brain, kidneys, and red blood cells. The level of AST in the blood is often tested to reveal the presence of liver disease or of damage to the liver.hen elevated AST indicates damage to the liver, this damage can come from a variety of different causes, both in the sense of indicating various liver diseases and also in the sense of the diseases being due to various causes.