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Glucose (fasting)
Primary marker for diabetes screening and metabolic health
Also known as: Fasting Blood Sugar,FBS,Glucose Fasting,Fasting Glucose
Reference Ranges
Clinical Reference
70.0 – 100.0 mg/dL
Optimal Range
75.0 – 95.0 mg/dL
Critical Range
< 40.0
/
> 500.0
mg/dL
Fasting 8-12h
Related Conditions
Diabetes
High
Metabolic Syndrome
High
Food & Lifestyle Recommendations
🍎 Food
Reduce refined carbohydrates and added sugars; prioritize whole grains, legumes, and vegetables
Low-glycemic diet improves fasting glucose in RCTs
🏃 Exercise
Aim for 150+ min/week of moderate aerobic activity; even a 10-min walk after meals helps
Post-meal walks reduce glucose spikes by 20-30% in studies
😴 Sleep
Prioritize 7-8 hours of quality sleep; poor sleep directly increases insulin resistance
Sleep restriction increases fasting glucose by 10-20 mg/dL
Evidence-Backed Supplements
When High
-
Mixed evidence; some RCTs show modest glucose reduction
Chromium picolinate 200–1000 mcg/day With meals -
Strong evidence; meta-analyses show comparable to metformin
Berberine HCl 500 mg 2–3x/day With meals -
Modest effect in meta-analyses; heterogenous results
Ceylon cinnamon extract (avoid cassia) 120–360 mg/day or 1–6 g powder With meals -
Berberine activates AMPK; meta-analyses show HbA1c reduction comparable to metformin
Berberine HCl 500 mg 2–3x/day With meals -
Chromium picolinate shows modest fasting glucose reduction in meta-analyses
Chromium picolinate 200–1000 mcg/day With meals -
ALA improves insulin sensitivity; IV form used for diabetic neuropathy
Questions to Ask Your Doctor
- Could my elevated fasting glucose indicate prediabetes or early insulin resistance? Ask about HbA1c and OGTT follow-up
- Should I be monitoring my post-meal glucose levels as well? Postprandial glucose can reveal issues fasting glucose misses
Upload your blood test to see how your Glucose (fasting) compares to reference and optimal ranges.
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