Reference Ranges

What the colors mean

HealthTab applies the concept of ‘risk ranges’ to help you interpret your results in a clear, visual way. Low risk is generally considered ‘normal’ or within the reference range and is represented by the color green. An orange or red value means a particular result was outside of the reference interval established by the instrument manufacturer or cut points set by clinical guidelines.

However, it’s important to remember that your body is a complex system that is in constant flux. Some biomarkers can occasionally be ‘abnormal’ for reasons unrelated to a specific health concern. Think of the indicators on your dashboard as a ‘check engine’ light – a signal that parts of your health might need further investigation and you should follow up with your doctor to learn more.

HealthTab is a screening tool and is not intended to provide a diagnosis of any kind or to replace the valuable role of your doctor, pharmacist, and other trusted health experts in evaluating your results in the broader context of your history and overall health.

For more information, we recommend reading Reference Ranges and What They Mean.

Our reference ranges

The table below outlines the reference intervals and cut points HealthTab uses in applying a relative health risk category to patient results. All units are in SI, the international system of laboratory measurement. If you would like to convert your results to US units, you can use this calculator.

Total Cholesterol1 (mmol/L)< 5.2Desirable
 5.2 - 6.1Borderline high
 > 6.1High
HDL1,2 (mmol/L)> 1.53Less than average risk
 1.03 - 1.53Average risk (male)
 1.29 - 1.53Average risk (female)
 < 1.03Increased risk (male)
 < 1.29Increased risk (female)
LDL1 (mmol/L)< 2.6Optimal
 2.6 - 3.3Near optimal
 3.4 - 4.1Borderline high
 4.2 - 4.9High
 > 4.9Very high
CHOL/HDL3,4 (mmol/L)< 3.5Optimal (male)
 < 3.4Optimal (female)
 > 5.0Above average risk (male)
 > 4.4Above average risk (female)
Non-HDL1,2 (mmol/L)< 3.4Optimal
 3.4 - 4.1Near optimal
 4.2 - 4.9Borderline high
 5.0 - 5.7High
 > 5.7Very high
Triglycerides1 (mmol/L)< 1.69Desirable
 1.69 - 2.25Borderline high
 2.26 - 5.63High
 > 5.63Very high
Glucose6,7,8 (mmol/L)< 5.6Normal (fasting)
 < 7.8Normal (non-fasting)
 4.1 - 6.6Reference interval (fasting)
 < 2, > 30Critical
HbA1c11 (%)< 6.0Normal
 <= 7.0Target (diabetic)
ALT9,A (U/L)10 - 47Reference interval
AST9,A (U/L)11 - 38Reference interval
ALP9,A (U/L)53 - 128Reference interval (male)
 42 - 141Reference interval (female)
Total Bilirubin9,A (µmol/L)4 - 27Reference interval
Albumin9 (g/L)33 - 55Reference interval
Total Protein9 (g/L)64 - 81Reference interval
AUS9 (mmol urea/L)2.5 - 7.9Reference interval
Creatinine9 (umol/L)53 - 106Reference interval
eGFR10,B (mL/min/1.73 m2)> 59Normal
Sodium9 (mmol/L)128 - 145Reference interval
 < 120, > 160Critical
Potassium9 (mmol/L)3.6 - 5.1Reference interval
 < 2.8, > 6.2Critical
Calcium9 (mmol/L)2.0 - 2.58Reference interval
 < 1.5, > 3.25Critical
Chloride9 (mmol/L)98 - 108Reference interval
Total CO29 (mmol/L)18 - 33Reference interval
 < 10, > 40Critical
  1. National Cholesterol Education Program ATP III
  2. Lab Tests Online - Lipid Panel
  3. Harvard Medical Health Guide
  4. American Heart Association
  5. Lab Tests Online - VLDL
  6. Abaxis – Piccolo® Lipid Panel Plus Reagent Disc
  7. American Diabetes Association
  8. Mayo Clinic
  9. Abaxis – Piccolo® Comprehensive Metabolic Reagent Disc
  10. National Kidney Disease Education Program
  11. Canadian Diabetes Association
  1. Values below the lower limit of these ranges are still interpreted as ‘Low Risk’ by the HealthTab system because they are usually not of concern from a medical standpoint.
  2. HealthTab calculates eGFR using the 2009 CKD-EPI creatinine equation as recommended by the Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group.