NAD Testing

NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every living cell. It powers the conversion of nutrients into cellular energy, supports DNA repair, and activates sirtuins — the proteins closely linked to healthy ageing. Without adequate NAD+, cells simply cannot function at their best.

Why NAD+ declines

Research suggests NAD+ levels fall significantly as we age, with contributing factors including chronic stress, poor sleep, metabolic strain, and inflammation. This decline is associated with lower energy, slower recovery, and reduced cellular resilience.

Why test before you supplement

NAD+ boosters — from NMN and NR supplements to IV infusions — have become one of the fastest-growing categories in longevity. But without a baseline measurement, you are optimising blind. Testing answers three essential questions:

• Where do you stand today? Your NAD+ level compared to an optimal range and your age cohort.
• Is your protocol working? Retesting shows whether your supplementation, dosage, or delivery method is actually raising your levels.
• What should you change? Data allows you and your practitioner to personalise — not guess.

How NAD testing works

A simple blood sample is analysed to quantify your intracellular NAD+ level. Results are benchmarked against optimal ranges, giving you a clear starting point. From there, a test–optimise–retest cycle (typically every 3 months) lets you track real progress.

Measure first. Then optimise.

At Bien-Être, we believe prevention starts with precision. Our CellularIQ NAD+ test gives you an accurate picture of your cellular energy status — so every step of your longevity protocol is guided by data, not trends.

Where prevention meets precision.