A total cholesterol level of 240 mg/dL or higher is considered high, while 200 to 239 mg/dL falls in the borderline-high range. But total cholesterol is only part of the picture. Your lipid panel breaks cholesterol into several types, and each has its own thresholds that matter for heart disease risk.
Total Cholesterol Numbers
When your doctor orders a lipid panel, the total cholesterol number is the broadest measure. Below 200 mg/dL is desirable. Between 200 and 239 mg/dL is borderline high, meaning it warrants attention but not necessarily alarm. At 240 mg/dL and above, you’re in the high category, which roughly doubles heart disease risk compared to someone with desirable levels.
That said, total cholesterol alone can be misleading. Someone with a high total number driven mostly by protective HDL cholesterol is in a very different situation than someone whose number is high because of LDL. That’s why doctors look at the full breakdown.
LDL: The Number That Matters Most
LDL cholesterol is the type that builds up in artery walls and drives plaque formation. Its ranges are more granular than total cholesterol:
- Optimal: Less than 100 mg/dL
- Near optimal: 100 to 129 mg/dL
- Borderline high: 130 to 159 mg/dL
- High: 160 to 189 mg/dL
- Very high: 190 mg/dL and above
These categories apply to the general adult population. If you already have heart disease, diabetes, or chronic kidney disease, the targets are stricter. The 2026 ACC/AHA guidelines, which replaced the 2018 version, set specific LDL goals based on your estimated 10-year risk of a heart attack or stroke. For people at borderline or intermediate risk, the goal is under 100 mg/dL. For those at high risk, it drops to under 70 mg/dL. And for people who already have cardiovascular disease and are at very high risk of another event, the target is under 55 mg/dL.
HDL: When Higher Is Better
HDL cholesterol works in the opposite direction from LDL. It helps remove excess cholesterol from your bloodstream, so higher levels are protective. The thresholds differ slightly by sex:
- At risk (men): Less than 40 mg/dL
- At risk (women): Less than 50 mg/dL
- Desirable (both): 60 mg/dL or above
Low HDL is an independent risk factor for heart disease. If your HDL is below those at-risk thresholds, it raises concern even if your other numbers look reasonable.
Triglycerides
Triglycerides aren’t cholesterol, but they’re measured on the same blood test and play a role in cardiovascular risk. These are fat molecules your body stores from excess calories.
- Healthy: Below 150 mg/dL
- Borderline high: 150 to 199 mg/dL
- High: 200 to 499 mg/dL
- Very high: 500 mg/dL and above
Very high triglycerides (above 500) carry a risk beyond heart disease: they can trigger inflammation of the pancreas, which is a medical emergency. High triglycerides often accompany excess weight, high sugar intake, and heavy alcohol use, and they tend to respond well to lifestyle changes.
Non-HDL Cholesterol
Many doctors now pay close attention to non-HDL cholesterol, which is simply your total cholesterol minus your HDL. This single number captures all the harmful cholesterol types at once, not just LDL. An optimal non-HDL level for most people is less than 130 mg/dL. If you have a history of heart disease, the target is lower. The Mayo Clinic notes that non-HDL cholesterol may actually be a better predictor of heart disease risk than LDL alone, particularly for people with high triglycerides.
Cholesterol Levels in Children and Teens
The thresholds for anyone 19 or younger are lower than adult ranges. Healthy levels for children and adolescents are:
- Total cholesterol: Less than 170 mg/dL
- LDL: Less than 110 mg/dL
- HDL: More than 45 mg/dL
- Non-HDL: Less than 120 mg/dL
Cholesterol-lowering medication is generally only considered for children 10 and older whose LDL stays above 190 mg/dL after six months of diet and exercise changes, or above 160 mg/dL if they have additional risk factors for heart disease.
Do You Need to Fast Before the Test?
Traditionally, doctors asked you to fast for 9 to 12 hours before a lipid panel. Research published in the AHA journal Circulation found that eating a normal meal changes results only minimally: LDL and total cholesterol dip by about 8 mg/dL at most in the first couple hours after eating, and triglycerides rise by about 27 mg/dL. These shifts are small enough that many experts now consider non-fasting lipid panels perfectly acceptable for routine screening. Your doctor may still request a fasting test if your triglycerides come back elevated on a non-fasting draw, since that’s the number most affected by recent food intake.
Risk Factors That Lower Your Target
The standard thresholds listed above apply to generally healthy adults. But the newest guidelines emphasize that your personal target depends on your overall cardiovascular risk, not just the number on the lab report. Several conditions push your ideal LDL lower than the standard “optimal” of 100 mg/dL:
- Existing heart disease or prior heart attack/stroke: LDL goal under 70 mg/dL, or under 55 mg/dL for very high-risk patients
- Type 1 or Type 2 diabetes
- Chronic kidney disease (stage 3 or higher)
- Chronic inflammatory conditions like lupus or rheumatoid arthritis
- Family history of early heart disease
The updated guidelines also recognize that certain ancestral backgrounds, including South Asian and Filipino heritage, carry higher cardiovascular risk. Reproductive factors like early menopause, preeclampsia, and gestational diabetes are now considered risk enhancers for women. All of these factors can shift the conversation about what counts as “high enough to treat” even when your numbers fall in the borderline range.
Your 10-year risk of a cardiovascular event is now calculated using a newer tool called the PREVENT equations, which tend to produce risk estimates 40% to 50% lower than the older calculator. Under the current guidelines, a 10-year risk of 3% or higher is enough to start discussing cholesterol-lowering treatment, down from the previous 5% threshold.