The Bad Cholesterol
LDL carries cholesterol through your bloodstream and drops it off in artery walls—especially where there's damage or inflammation. Over years, these deposits build into plaques that narrow arteries and can rupture, causing heart attacks. Lower LDL = less "litter" in your arteries.
What is LDL Cholesterol?
LDL (Low-Density Lipoprotein) is "bad cholesterol" because it deposits cholesterol in artery walls, leading to atherosclerosis. It's the primary target of cholesterol therapy because reducing LDL definitively reduces cardiovascular events.
↑ What High LDL Cholesterol Means
More cholesterol being deposited in artery walls. This is a major modifiable risk factor. Good news: lowering LDL definitely reduces your risk, and we have effective ways to do it.
Common symptoms:
No symptoms until heart attack or stroke · Xanthomas (fatty skin deposits) in severe genetic cases
↓ What Low LDL Cholesterol Means
Excellent for heart health. Very low LDL (<70 mg/dL) is the goal for people with existing heart disease.
Common symptoms:
No symptoms—low LDL is beneficial
Why It Matters
When normal:
Lower LDL = lower heart attack risk
Every 40 mg/dL reduction = ~25% less risk
Plaques can stabilize with very low LDL
Risks if abnormal:
#1 modifiable risk factor for heart disease
Directly causes atherosclerosis
No symptoms until heart attack or stroke
What Can Cause Abnormal Levels?
Diet High in Saturated Fat
70% likelySaturated fat (red meat, butter, cheese, fried foods) raises LDL more than dietary cholesterol itself.
Genetics
50% likelyAbout 1 in 250 people have familial hypercholesterolemia.
Sedentary Lifestyle
Exercise helps clear LDL from bloodstream.
Obesity
Increases LDL production and decreases clearance.
Trans Fats
Partially hydrogenated oils raise LDL and lower HDL—worst combination.
What You Can Do
Reduce saturated fat to <7% of calories
Impact: -10-15% LDL \u00B7 Timeline: 4-8 weeks
Eliminate trans fats completely
Impact: Significant improvement \u00B7 Timeline: Immediate
Soluble fiber: 10-25g daily (oats, beans, barley)
Impact: -5-10% LDL \u00B7 Timeline: 4-8 weeks
Plant sterols/stanols: 2g daily
Impact: -10% LDL \u00B7 Timeline: 4-8 weeks
If lifestyle changes aren't enough:
Aerobic exercise: 150+ min/week
Impact: -5-10% LDL \u00B7 Timeline: 8-12 weeks
Lose 5-10% body weight
Impact: -5-8% per 10 lbs lost \u00B7 Timeline: 3-6 months
Red yeast rice: 1200mg twice daily
Impact: -20-30% (natural statin) \u00B7 Timeline: 8-12 weeks
Recommended retest: 6-8 weeks after starting medication, 3-6 months after lifestyle changes
Related Markers
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