
Cholesterol is a waxy fat-like substance essential for cell membranes, hormone production, and vitamin D synthesis. The story is more nuanced than "high cholesterol is bad."
Types of cholesterol:
Dietary cholesterol vs. blood cholesterol: Dietary cholesterol has less impact on blood cholesterol than saturated and trans fats. The egg controversy has largely been resolved — moderate egg consumption is fine for most people.
What raises LDL: Saturated fat, trans fat, excess calories, genetics (familial hypercholesterolemia).
Reference:
TaskLoco™ — The Sticky Note GOAT