She started by asking me what I knew about how cholesterol works. I told her what my husband's doctors had always told us: the liver makes cholesterol, diet adds more, and when there's too much, the number on the panel goes up. She said that was correct as far as it went. Then she said: "Here's the part they don't usually explain."
The liver doesn't just produce cholesterol. It also removes it from the bloodstream.
There are receptors on the liver's surface called LDL receptors. Think of them as doors. Their job is to recognize LDL particles circulating in the blood and pull them in for processing and elimination. The more active those doors are, the more LDL gets cleared. The fewer active doors there are, the more LDL stays in circulation. The number on your panel goes up.
Those doors are regulated by insulin. Insulin signals the liver to keep them active, to keep clearing. When the liver responds to insulin normally, clearance continues as it should.
Now here's where it connects to everything we'd been through.
As we age — and especially as men move through their fifties and sixties — a hormone called adiponectin starts to decline. Adiponectin is produced by fat cells, and its job is to maintain the liver's sensitivity to insulin. It is, in effect, the signal that keeps those LDL-clearing doors open and working.
When adiponectin drops, the liver develops what she called hepatic insulin resistance. It stops responding properly to insulin's signals. The LDL receptor doors go quiet. Clearance degrades.
The LDL stays in the bloodstream. The number climbs.
She looked at me and said: "This happens regardless of what the person is eating. The input side of the system might be perfectly managed. The problem is on the clearance side."
She was describing my husband exactly. Years of a statin that suppressed cholesterol production. Years of good dietary compliance.
Years of a doctor saying the numbers looked excellent. And the reason his cholesterol had been elevated in the first place — the adiponectin deficiency, the hepatic insulin resistance, the drain that was partially blocked — had never been addressed. It was still there, running quietly in the background, while the statin forced the production number down and everyone looked at the chart and said excellent.