The antioxidant NAC didn't change the size of the heart muscle in mice with heart failure.

The antioxidant NAC didn't change the blood pressure in mice with heart failure, even though it reduced heart scarring.

Giving the antioxidant NAC to mice with heart failure didn't help their heart's pumping ability improve, even though it reduced some scarring.

The antioxidant NAC didn't change the levels of two heart stress markers in mice with heart failure.

The antioxidant NAC made the heart cells in mice with heart failure produce about 42% less of a marker that shows oxidative stress.

The antioxidant NAC made the heart cells in mice with heart failure produce about 30-40% less of the proteins that form scar tissue.