Essential Blood Markers to Monitor

Lipid Panel

Total Cholesterol (150-250 mg/dL)

“The relationship between serum cholesterol and cardiovascular disease (CVD) risk is more nuanced than previously believed, with evidence suggesting that very low cholesterol levels may not necessarily be better.”

– Int J Environ Res Public Health.

HDL (High-Density Lipoprotein)

  • Men: >40 mg/dL
  • Women: >50 mg/dL

“HDL cholesterol levels above 40 mg/dL for men and 50 mg/dL for women are considered protective against heart disease.”

– American Heart Association Guidelines

Triglycerides

  • Optimal: <150 mg/dL
  • Ideal: <100 mg/dL

“Low-carbohydrate diets consistently show significant reductions in triglyceride levels.”

– American Journal of Clinical Nutrition Study

Metabolic Markers

Fasting Blood Glucose

  • Optimal range: 70-90 mg/dL
  • Conventional range: 70-100 mg/dL

“Fasting glucose levels below 90 mg/dL are associated with optimal metabolic health.”

– PubMed

HbA1c (Glycated Hemoglobin)

  • Optimal: <5.7%
  • Pre-diabetic: 5.7-6.4%
  • Diabetic: >6.5%

“HbA1c below 5.7% indicates normal glucose metabolism.”

– American Diabetes Association

Fasting Insulin

  • Optimal: <8 µIU/mL
  • Functional range: <5 µIU/mL

“Below, we’ve summarized comments from five Levels advisors—all suggest that fasting insulin should stay below 10 μU/mL.”

– Levels

Additional Important Research

When to Test

Recommended Testing Schedule

  • Baseline (Before Starting):
    • Complete metabolic panel
    • Lipid panel
    • Thyroid function
    • Complete blood count
    • Vitamin D
  • Follow-up Testing:
    • 3 months: Basic metabolic panel
    • 6 months: Comprehensive testing
    • Annually: Full panel review

Important Notes for Working with Your Doctor

  • Share your dietary approach
  • Request comprehensive testing
  • Track trends over time
  • Consider working with a low-carb friendly physician (Low Carb USA Provider Directory)

Important Note: Reference ranges can vary by laboratory and population. Always consult with a qualified healthcare provider for interpretation of your specific results. This article is for informational purposes only and should not be considered medical advice.