What is alpha-1 antitrypsin deficiency?

Also known as: AATD, A1AT, alpha-1.

Alpha-1 antitrypsin is a protein produced by the liver. It plays a role in protecting the lungs. When the body doesn’t make enough of it, or it can’t travel properly from the liver to the lungs, the disease is known as alpha-1 antitrypsin deficiency. It can cause both liver and lung problems.

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Reviewed by: John M. Peters, DO

This page was last updated on: 1/29/2019 3:21:13 PM