> Hen tested (via ultra fast CT scan) the blood flow after the experiment -- there was no change. > It may sound depressing

I think this is a fundamental misunderstanding of the purpose of enforcing low cholesterol.

The goal would be to prevent further damage and restriction. By all accounts that test is a positive result.

Atherosclerosis is correlated with lifetime exposure to high cholesterol. Once you reach the point of having open heart surgery for severe problems, the goal is to slow further progression as much as possible.

Hoping to reverse a lifetime of accumulated exposure to high cholesterol with 7 years of slightly below average cholesterol just isn’t going to happen. Stopping further progression is great though!