NAD Profile

Every cell in your body depends on a single molecule to turn food into energy, repair damaged DNA, and defend against oxidative stress (damage from unstable molecules that builds up over time). That molecule is nicotinamide adenine dinucleotide, or NAD+. By your forties and fifties, your NAD+ levels may have dropped substantially from where they were in your twenties. This panel measures NAD+ alongside its partner molecules to show you where your cellular energy system stands right now.

A single NAD+ measurement tells you something useful, but it does not tell you enough. The NAD Profile adds the energy-carrying form (NADH), the antioxidant-related forms (NADP+ and NADPH), the precursor vitamins your body uses to build NAD+, and three calculated ratios that reveal the balance between energy production and antioxidant defense. Together, these nine markers paint a picture of cellular metabolic fitness that no single test can provide.

A Note on Clinical Maturity

This panel sits at the frontier of metabolic testing. NAD+ and its related molecules are well established in biochemistry, and research linking NAD+ decline to aging is growing rapidly. However, standardized clinical reference ranges for blood NAD+ levels have not yet been established by major medical societies. No professional guidelines currently recommend routine NAD+ testing for screening or diagnosis.

That said, the science connecting NAD+ to aging, metabolic function, and disease risk is compelling enough that longevity physicians and researchers increasingly use this panel to guide supplementation and track interventions. Treat your results as a metabolic snapshot rather than a clinical diagnosis.

What This Panel Reveals

The NAD Profile covers three interconnected domains of cellular metabolism: energy production, antioxidant defense, and precursor supply.

Energy Production and Cellular Balance

NAD+ is the oxidized (ready-to-work) form of nicotinamide adenine dinucleotide. Your mitochondria (the energy factories inside each cell) use NAD+ to convert the calories you eat into a usable energy currency called ATP. When NAD+ accepts electrons during this process, it becomes NADH, the energy-loaded form. The ratio between these two forms (the NAD/NADH Ratio) reflects how efficiently your cells are cycling between energy extraction and energy production.

A healthy cell maintains more NAD+ than NADH, keeping the ratio tilted toward the oxidized side. When this ratio drops, it can signal that mitochondria are struggling to keep up with demand, or that metabolic stress from alcohol, excessive calorie intake, or other factors is overwhelming the system. A study of 29 healthy adults published in Rejuvenation Research found that plasma NAD+ levels declined with age, with those over 60 showing significantly lower levels than those aged 20 to 40.

Antioxidant Defense

NADP+ and NADPH form a second molecular pair that works in parallel to NAD+ and NADH but serves a different purpose. While NAD+ drives energy production, NADPH fuels your body's antioxidant recycling systems. NADPH provides the chemical energy needed to recharge glutathione, one of the body's most important built-in antioxidants (molecules that neutralize the unstable byproducts of normal metabolism).

The NADP/NADPH Ratio tells you whether your antioxidant defense system has enough fuel. A shift toward too little NADPH relative to NADP+ may indicate that oxidative stress is outpacing your body's ability to neutralize it. This matters for everything from cardiovascular health to immune function.

Precursor Supply

Your body builds NAD+ from precursor vitamins, primarily forms of vitamin B3. This panel measures two of those precursors: nicotinamide (also called niacinamide) and nicotinic acid (also called niacin). These are the raw materials your cells use to synthesize and replenish NAD+.

Low precursor levels alongside low NAD+ suggest that the problem may start with insufficient building blocks, whether from diet, absorption issues, or increased demand. High precursors with low NAD+ point to a different problem: the conversion machinery itself may be impaired. This distinction matters because the intervention for each scenario is different.

How to Read Your Results Together

The real value of this panel is in the patterns. Individual numbers in isolation tell you less than how the markers relate to each other.

The NAD/NADP Index brings these two systems together. It reflects the overall balance between your energy production pool (NAD+) and your antioxidant defense pool (NADP+). A skewed index suggests one system is being depleted at the expense of the other.

When Results Can Be Misleading

Because standardized reference ranges for blood NAD+ levels are still evolving, interpreting any single result requires caution. Several factors can shift your numbers temporarily. Recent intense exercise can transiently lower NAD+ as muscles consume it for energy recovery. Alcohol intake within 24 to 48 hours of testing can suppress the NAD/NADH ratio because alcohol metabolism directly consumes NAD+. Even your recent meal composition may influence results.

Medications can also affect this panel. Certain chemotherapy agents deplete NAD+ pools. Isoniazid, used for tuberculosis, interferes with NAD+ synthesis. If you take any NAD+ precursor supplements (nicotinamide riboside, nicotinamide mononucleotide, or niacin), your results will reflect that supplementation rather than your baseline status. Discuss your medication and supplement list with the clinician reviewing your results.

Tracking Over Time

A single NAD Profile gives you a snapshot. Serial testing, repeated every six to twelve months, transforms that snapshot into a trend line. This is where the panel becomes most useful. You can see whether your NAD+ levels are declining faster than expected for your age, whether a supplement or lifestyle change is actually raising your levels, and whether the ratios between energy production and antioxidant defense stay balanced over time.

In a clinical trial published in Nature Communications, healthy adults aged 55 to 79 who took nicotinamide riboside (a NAD+ precursor supplement) for six weeks showed a roughly 60% increase in blood NAD+ levels compared to placebo. Serial testing is how you would confirm whether a similar intervention is working for you personally, since individual responses vary.

What to Do with Your Results

If all nine markers fall within expected ranges, you have a reassuring baseline. Retest in 12 months to track age-related changes. If one or more markers are outside the expected range, here is a practical decision pathway:

• Low NAD+ or low NAD/NADH Ratio: Discuss with a longevity or functional medicine physician. Consider whether supplementation with a NAD+ precursor is appropriate. Evaluate lifestyle factors that consume NAD+ (alcohol, poor sleep, caloric excess, chronic inflammation).
• Low NADPH or low NADP/NADPH Ratio: Investigate sources of oxidative stress. Consider testing glutathione (a key antioxidant your body makes internally) and inflammatory markers such as hs-CRP (high-sensitivity C-reactive protein) to see if chronic inflammation is driving the imbalance.
• Low precursors (nicotinamide or nicotinic acid): Evaluate dietary intake of vitamin B3 from food sources (poultry, fish, legumes, fortified grains). Consider whether a gut health issue may be limiting absorption.
• Skewed NAD/NADP Index: This pattern warrants a broader metabolic workup. Consider adding a metabolic panel and markers of mitochondrial function to understand the full picture.

Because this panel does not yet have consensus-based clinical guidelines, results should be interpreted alongside your full health picture, not in isolation. A knowledgeable clinician can help you distinguish a meaningful finding from normal variation.