Because health is dynamic.
One test per year can miss early warning signs, while testing every 6 months allows you to detect trends before a problem develops.
Some biomarkers change quickly and are influenced by diet, stress, exercise, or other lifestyle factors.
Concrete examples:
Prediabetes: A fasting glucose level that appears "normal" in January may shift toward a high HOMA-IR or borderline HbA1c by July. Without an intermediate test, this drift can go unnoticed for a full year.
Vitamin D deficiency: Often normal in summer, it tends to drop in autumn. A single annual test won't catch the seasonal decline in time to adjust supplementation.
Chronic inflammation: Elevated hs-CRP or ferritin levels over 3–6 months may signal hidden oxidative stress. Better to catch it early than too late.
Testosterone: In active men, levels can fluctuate significantly depending on sleep, stress, and exercise. Testing every 6 months can identify abnormal drops, which may correlate with low energy or libido.
With 2 tests per year, you gain a real decision-making tool to:
track your efforts (training, nutrition, supplements),
adjust your routines before imbalances become symptomatic,
refine your strategy based on real data.
Want to go even further?
You can always add follow-up tests anytime you’re experimenting (with fasting, supplementation, muscle gain, etc.).