Hdl cholesterol normal range
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HDL Cholesterol Normal Range: Key Definitions and Population Data
High-density lipoprotein cholesterol (HDL-C) is often referred to as "good" cholesterol because higher levels are generally associated with a lower risk of cardiovascular disease. The normal range for HDL cholesterol is typically defined as 40 mg/dL or higher in adults, with levels below 40 mg/dL considered low and associated with increased cardiovascular risk Carroll2017Carroll2020. This threshold is widely used in clinical practice and public health reporting.
HDL Cholesterol Ranges in Adults
Large-scale population studies in the United States have consistently used <40 mg/dL as the cutoff for low HDL cholesterol in adults, regardless of sex, and have shown that both high total cholesterol (≥240 mg/dL) and low HDL cholesterol (<40 mg/dL) are independent risk factors for coronary heart disease Carroll2017Carroll2020. Trends from 2007–2018 indicate a decline in the prevalence of low HDL cholesterol among U.S. adults, but the <40 mg/dL threshold remains the standard for defining low HDL-C Carroll2017Carroll2020.
HDL Cholesterol in Children
Reference values for HDL cholesterol in healthy children vary by age group, but mean HDL-C levels generally increase with age. For example, in one study, mean HDL-C ranged from about 32 mg/dL in infants (0–12 months) to about 46 mg/dL in older children (7–15 years), with no significant differences between males and females . These values suggest that while the adult cutoff of 40 mg/dL is a useful benchmark, normal ranges in children may be somewhat lower, especially in infancy.
Optimal HDL Cholesterol Range in the Elderly
Among elderly populations, research has identified a nonlinear relationship between HDL-C levels and mortality. The lowest risk of all-cause mortality was observed in individuals with HDL-C concentrations between 61 and 87 mg/dL, with a single optimal value at 71 mg/dL. Both lower (<61 mg/dL) and higher (>87 mg/dL) HDL-C levels were associated with increased mortality risk, suggesting that extremely high HDL-C may not always be beneficial in older adults .
Risks Associated with Low and High HDL Cholesterol
Both low and very high HDL cholesterol levels have been linked to increased health risks. Low HDL-C (<40 mg/dL) is a well-established risk factor for cardiovascular disease Carroll2017Carroll2020. Interestingly, very high HDL-C levels (above 100 mg/dL) have also been associated with a higher risk of infectious diseases, indicating a U-shaped relationship between HDL-C and certain health outcomes . The optimal range for minimizing risk appears to be between 61 and 95 mg/dL in adults Li2019Madsen2018.
Laboratory Reference Ranges and Standardization
Automated enzymatic methods for measuring HDL cholesterol have been standardized, with reference values for HDL-C typically ranging from 26.5 to 64 mg/dL in laboratory settings . These methods ensure consistency and reliability in clinical testing.
Conclusion
The normal range for HDL cholesterol in adults is generally considered to be 40 mg/dL or higher, with values below this threshold indicating increased cardiovascular risk. In children, normal values are age-dependent but tend to rise with age. For elderly individuals, the optimal HDL-C range for lowest mortality risk is between 61 and 87 mg/dL. Both low and very high HDL-C levels can be associated with adverse health outcomes, highlighting the importance of maintaining HDL cholesterol within an optimal range for overall health.
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