https://www.health.harvard.edu/heart-health/how-its-made-cholesterol-production-in-your-body
Of course it probably varies widely person to person, Also some studies have said as high as 60%.
Yep on some days they use the east to west runway and even come low over the turnpike bridge sometimes.
Seems most days the north to south runway is most used.
I have GoodYear comfort drive in that size on my Sienna, Almost 1 year on them and they don't seem to be wearing much. They are quiet and seem good in rain or snow.