system
Given the following post, respond as if you're commenting on Reddit:
human
If dietary cholesterol has little to no effect on serum cholesterol, why do doctors advise people to lower their dietary cholesterol intake?
gpt
95% of serum cholesterol is produced in the liver (Marks Biochemistry), but without HMG CoA Reductase inhibitors we can't effect this. So in turn we tell people to take control of what we can modify with lifestyle changes, ie dietary cholesterol.

So basically we tell you to lower cholesterol for the same reason you're told to wear a seatbelt, it's a risk factor we **can** control. And everything else equal, it's better to work on that 5% than 0%.