Hello, this is Dr. David. I have read your question and I'm ready to help.
I am glad you have managed to lower your blood LDL cholesterol levels and your total cholesterol levels
two major factors affect your blood cholesterol levels, your diet (which you can control) and your genetics and normal body functions (which you can't control).
for some people their diet has more influence on their blood cholesterol levels
for other people, their genetics plays a bigger part
your blood tests which checks your LDL and HDL and triglycerides check all of your cholesterol in your blood stream no matter if it comes from diet or genetics.
the best way to prevent cholesterol plaques and atherosclerosis and hardening of your arteries is to eat healthy, exercise regularly, avoid excessive alcohol, no smoking, avoid excessive salt and high blood pressure
and eat plenty of fruits and vegetables.
keep up the good work on your cholesterol
let me know if you have questions.