I am also sure that cholesterol level is hereditary but my current GP doesn't believe me. Nor he should, I suppose.
Normally, I am about 6.1. Have been forever, regardless. I will NOT take medication for this. So ... to reduce it, this time, I have given up dairy, completely, to try and prove a point. Last time I gave up red meat for 6 months my cholesterol went down to 5.5, I did not change anything else. The GP said that cutting out red meat could NOT have made a difference, but it did. Obviously.
This time I am going a bit further with "my experiment". It could make my level sky-rocket, who knows. I will see the GP tomorrow to get a referral to have blood taken. Could be a week or so before I know the results.
Could be interesting.

Who cares anyhow? I am not overweight. I don't smoke, drink or eat rubbish food.
I will live as long as I live, regardless of cholesterol.
