Why is my steak brown after thawing?

When a steak turns brown after thawing, it is due to a process called oxidation. When meat is exposed to air, the iron in the myoglobin (a protein in meat that gives it its red color) reacts with oxygen, causing the meat to turn brown. This is a natural and safe process, and the steak is still safe to eat as long as it has been properly stored and thawed.