Blood Sugar / Metabolism

Blood sugar control affects far more than diabetes risk. Even modestly elevated HbA1c — well below the diabetic threshold — is associated with elevated cardiovascular risk, accelerated cognitive ageing, and reduced energy stability throughout the day. Testing reveals where you actually sit on the metabolic spectrum and gives you objective feedback on whether lifestyle changes are working.

Blood sugar and metabolic biomarkers

• HbA1c (glycated haemoglobin) — The gold-standard marker of long-term blood sugar control. Reflects your average blood glucose over the past 8–12 weeks. Stable across days (unlike random glucose), making it useful for tracking change.
• Omega-3 Index — Influences insulin sensitivity and inflammation balance. Higher Omega-3 Index is associated with better metabolic markers.
• NAD+ Index — Powers the mitochondrial reactions that process glucose. Declining NAD+ contributes to age-related metabolic decline.
• Vitamin D — Vitamin D deficiency is associated with reduced insulin sensitivity. Many people with prediabetes also have suboptimal vitamin D.

HbA1c reference ranges

• Optimal — Below 5.0% (31 mmol/mol). Best long-term cardiometabolic profile.
• Normal — 5.0–5.6% (31–38 mmol/mol). Within reference range but room to optimise.
• Prediabetic — 5.7–6.4% (39–47 mmol/mol). Intervene now to prevent progression.
• Diabetic — 6.5%+ (48+ mmol/mol). Requires medical management.

Why test even when symptom-free

HbA1c rises slowly over years — by the time you have noticeable symptoms (excess thirst, frequent urination, unexplained weight loss), the underlying metabolic shift has been progressing for a long time. Testing every 6–12 months catches the trajectory early, when lifestyle changes are most effective.

Each test uses simple at-home dried blood spot collection with clinical-grade HPLC analysis. Results in 3–5 business days.