Cholesterol Ratio Guide 2026: LDL, HDL and What Numbers Mean
Table of Contents
The Key Numbers
| Marker | Optimal | High Risk |
|---|---|---|
| Total cholesterol | Under 200 mg/dL | 240+ |
| LDL ("bad") | Under 100 | 160+ |
| HDL ("good") | 60+ | Under 40 (men), 50 (women) |
| Triglycerides | Under 150 | 200+ |
Unit conversion for the rest of the world: cholesterol mg/dL ÷ 38.67 = mmol/L (200 mg/dL = 5.2 mmol/L); triglycerides ÷ 88.57. A UK lab reporting total 5.2, LDL 3.0, HDL 1.4 is exactly the US "200/116/54" panel. Know both — travel, telehealth, and expat forums mix units constantly, and misread units have caused real medication errors. When in doubt, ask the lab which units; never guess.
Fasting is mostly obsolete: non-fasting panels are now standard in most guidelines since total cholesterol, HDL, and ratios barely move post-meal. The exception: triglycerides swing 20-30% after eating, and the Friedewald LDL calculation breaks when TG exceeds 400 mg/dL — then order a direct LDL or ApoB test instead of trusting the computed number your portal displays.
Ratio Example: 240 mg/dL Total
Panel: Total 240, LDL 155, HDL 45, Triglycerides 200.
- Total/HDL ratio: 240 / 45 = 5.3 (above 5.0 - elevated risk)
- LDL/HDL ratio: 155 / 45 = 3.4 (target under 3.0)
- Non-HDL cholesterol: 240 - 45 = 195 (target under 130 for high-risk)
Non-HDL cholesterol (total minus HDL) is now considered the best single predictor - it captures all atherogenic particles including VLDL.
Contrast panel — total 210, HDL 70, LDL 120, triglycerides 100: total/HDL = 3.0 (excellent), even though total 210 exceeds the "under 200" flag. This patient carries lower risk than the original 240/45 case despite the higher total — the single number misleads, the ratio enlightens. HDL above 60 is protective enough that some guidelines effectively subtract it from risk calculations; context beats cutoffs.
The advanced markers worth knowing: ApoB counts atherogenic particles directly — target under 90 mg/dL (under 80 if high-risk); it catches danger that LDL-C misses when particles are small and dense. Lp(a) is 80-90% genetic: test once in a lifetime; over 50 mg/dL (≈125 nmol/L) affects ~20% of people and roughly doubles risk independent of everything else — including a perfect lifestyle.
What Moves Each Number
| Change | LDL Effect | HDL Effect | Triglycerides |
|---|---|---|---|
| Cut saturated fat | Down 5-10% | -- | -- |
| Add soluble fiber (oats, beans) | Down 5-10% | -- | -- |
| Aerobic exercise | Down slightly | Up 5-10% | Down 10-20% |
| Cut sugar/alcohol | -- | -- | Down 20-30% |
| Lose 10 lb | Down ~8% | Up slightly | Down ~15% |
The portfolio diet — 2g plant sterols + 10g psyllium + 30g nuts + soy protein daily — cut LDL ~30% in trials, rivaling low-dose statins. Individually: sterols −8-10%, psyllium 10g −7%, 30g almonds/walnuts −5%. The effects are roughly additive, which is why dietitians prescribe the combination rather than single "superfoods." Food can be pharmacology when it's dosed like it.
Fat-swap hierarchy: replacing butter with olive oil drops LDL ~10% in trials; replacing it with refined carbs drops LDL slightly but raises triglycerides and lowers HDL — a bad trade most "low-fat" advice accidentally made. Eggs: one daily is neutral for ~70% of people; hyper-responders (~30%) see LDL rise 10-15% — a 3-month recheck after changing egg intake answers it personally. Trans fats remain the worst: they raise LDL and lower HDL simultaneously.
When Medication Enters
- Statins cut LDL 30-50%+ and are first-line for high risk (diabetes, established heart disease, LDL 190+).
- The 10-year ASCVD risk calculator guides decisions for borderline cases (7.5-20% risk).
- Statin muscle aches affect ~5-10% - dose/type changes usually resolve it; don't quit silently, tell your doctor.
- Diet + exercise remain mandatory alongside medication, not instead of it.
Intensity tiers: high-intensity (atorvastatin 40-80 mg, rosuvastatin 20-40 mg) cuts LDL 50%+; moderate (atorva 10-20 mg, simva 20-40 mg) cuts 30-49%. Add-on ezetimibe: another −15-20% for ~$10/month generic; PCSK9 inhibitors: −60% but ~$6,000/year — reserved for familial hypercholesterolemia or statin-intolerant high-risk patients. Bempedoic acid (−15-25%) is the newer non-statin option for the statin-intolerant, without the muscle-ache profile.
The CAC tiebreaker: a coronary calcium score of 0 means very low 10-year event risk — guidelines support deferring statins even with borderline LDL; 100+ (or 75th percentile for age) favors starting. It's a $100-400 CT scan that resolves the "should I medicate?" debate with a picture of your actual arteries instead of a risk calculator's population math. Data beats dread.
Frequently Asked Questions
Total/HDL under 5.0 (ideal under 3.5); LDL/HDL under 3.0. Non-HDL cholesterol under 130 is the modern primary target.
Less than once thought - saturated fat raises blood cholesterol far more than dietary cholesterol. Eggs are fine for most people in moderation.
Diet/exercise changes show in 6-12 weeks. Statins work within 2-4 weeks. Recheck panels after 3 months of changes.
Fasting (9-12 hrs) is still preferred for accurate triglycerides, though non-fasting panels are acceptable for routine screening.
Extremely low LDL (under 40) on medication appears safe in trials. Naturally very low cholesterol with other symptoms warrants investigation.