NAD Level Test — Measure Your Cellular Energy

The NAD Level Test is the only at-home test in the UK that measures both NAD+ and NADH — giving you not just a number but the redox ratio that reflects how efficiently your cells are actually generating energy. Co-developed by Dr Chun Tang via MeCheck. Simple finger-prick collection at home, accredited laboratory analysis under EN ISO 13485 quality standards, CE-IVD marked, ~7-day turnaround. £249 — the difference between guessing about your supplementation and knowing. The most clinically meaningful single test for anyone serious about NAD+ optimisation.

Most people who take NMN supplements are doing so without knowing where they started. They don't know if their NAD⁺ levels are critically depleted, marginally low, or already reasonably maintained. They have no way to measure whether supplementation is working. They are guessing.

This test changes that. The NAD Level Test measures both NAD⁺ (the active, oxidised form) and NADH (the reduced form that reflects how efficiently your cells are generating energy). Together, these two measurements give you a complete picture of your cellular metabolism status — not just a number, but a ratio that reflects your redox balance and metabolic resilience.

Why Your NAD⁺ Level Matters More Than You Think

NAD⁺ is involved in a large number of biochemical processes — cellular metabolism production via the electron transport chain, DNA repair via PARP enzymes, circadian rhythm regulation via SIRT1, and mitochondrial biogenesis via PGC-1α. Every cell in your body needs it to function. When it runs low, almost everything runs less efficiently.

NAD⁺ levels decline by roughly 1–2% per year from your mid-30s. Published estimates of the scale of that decline vary between studies and measurement methods. This decline correlates with the fatigue, slower recovery, reduced cognitive stamina and metabolic changes that most people assume are just "getting older." They are partly biology — but they are not inevitable.

The problem is that this decline is invisible. You cannot feel your NAD⁺ levels dropping. You cannot see them in a standard blood test. Until recently, measuring them accurately at all required a laboratory and specialist equipment. This test brings that measurement home.

What Makes This Test Clinically Meaningful

Many health tests measure a single value. The NAD Level Test measures two: NAD⁺ and NADH — and the relationship between them (the NAD⁺/NADH redox ratio) is as diagnostically important as either value alone.

A low NAD⁺/NADH ratio indicates impaired energy metabolism and oxidative stress — your cells are struggling to convert food into energy efficiently. A high ratio alongside low absolute NAD⁺ indicates depletion. Understanding both gives you precision that a single measurement cannot.

How It Works

What's Included

The Test and Supplement Protocol

For anyone taking NMN — or considering it — the NAD Level Test creates a measurement framework that turns supplementation from guesswork into evidence:

Step 1 — Establish your baseline. Test before you start NMN to know exactly where your NAD⁺ levels sit. Are you critically depleted, or just declining with age? The answer informs whether you should start with NMN Pure (500mg) or consider a higher dose approach.

Step 2 — Supplement consistently. Take NMN Plus (500mg β-NMN + Trans-Resveratrol) every morning for 90 days. Consistent daily supplementation is what shifts NAD⁺ levels meaningfully — not occasional use.

Step 3 — Re-test. A second test at 90 days tells you whether your levels have responded, by how much, and whether further adjustment is warranted. This is how longevity medicine actually works.

This test is a laboratory health assessment and is not a medical diagnostic. Results should be interpreted in the context of your wider health. If you have concerns about your health or are taking prescription medication, consult your GP. This product is supplied by MeCheck, a medical testing service co-founded by Dr Chun Tang.