The Measurement Gap

The core issue is that the wellness industry has historically been built on inputs (what you consume, inject or do), rather than outputs (how your body actually responds). Blood panels capture a snapshot of hormones, glucose and nutrient levels. But they can't tell you how efficiently your mitochondria are producing energy, how well your cardiovascular system delivers oxygen under stress or whether your cells can flexibly switch between burning fat and carbohydrates.

These aren't abstract questions. They determine whether a given intervention produces results or is wasted. A landmark study published in the Journal of the American College of Cardiology found that each unit increase in VO2 max was associated with a 45-day increase in longevity. A separate meta-analysis found that "mortality risk is reduced by 11%–17% for every 1-metabolic equivalent of task increase in aerobic fitness." Yet most people investing in longevity protocols have never had their VO2 max or metabolic rate objectively measured.​

Why Peptides Make This More Urgent

The recent surge in peptide therapies makes the measurement gap more consequential. Supplements provide raw materials that the body can use broadly. Peptides are signaling molecules; they issue specific instructions: repair this tissue, release this hormone, activate this pathway. That specificity makes them appealing, and it also makes them entirely dependent on the underlying system's capacity to respond.

If someone's fat oxidation is poor, their resting metabolic rate suppressed or their cardiovascular fitness low, those signals land on a system that can't fully execute the instruction. Combining peptide protocols with objective metabolic data can lead to more targeted and potentially more effective interventions, not because the peptides are different, but because the interventions are targeted rather than speculative.

Why Starting With A Baseline Is Simpler Than You Think

The first step for any clinic, wellness brand or practitioner isn't a technology overhaul. It's committing to a baseline before recommending a single protocol.

You don't need a hospital or research lab. Breath-based metabolic testing—indirect calorimetry—has been the gold standard in exercise physiology for decades and is now accessible outside academic settings. A single resting test under 10 minutes ​can help quantify resting metabolic rate, fat-versus-carbohydrate utilization, metabolic flexibility and cardiorespiratory fitness​: a complete physiological picture without rebuilding your entire offering.​

Position metabolic testing as your intake step—the assessment before nutrition, supplementation or recovery protocols begin. It can slot into any existing workflow and make everything downstream more precise.

The Three Metrics That Actually Drive Decisions

VO2 max is the single most predictive metric for longevity and cardiovascular health. In 2016, the American Heart Association formally recommended it be treated as a powerful predictor of mortality, alongside blood pressure and cholesterol, comparable to traditional risk factors such as smoking, hypertension or type 2 diabetes.

What makes VO2 max especially powerful is what it reveals beyond fitness: biological age. Researchers at the Norwegian University of Science and Technology developed the concept of "fitness age," the age at which your VO2 max would be considered average, and found it predicts mortality better than chronological age.

A 50-year-old with the aerobic capacity of a 35-year-old is biologically younger in the ways that matter most. This is a number that clients grasp immediately, reframing the conversation from performance to longevity. A client in the bottom quartile for their age shouldn't be starting with peptides. They should be building aerobic capacity first.

Substrate utilization, how the body partitions fat versus carbohydrate as fuel, is the clearest signal of metabolic flexibility. Someone burning almost exclusively carbohydrates at rest has a metabolic foundation that limits how well most longevity and recovery interventions will work. Identifying this early changes the intervention order entirely.

Resting metabolic rate calibrated against prediction equations tells you immediately whether standard nutrition advice applies. A 300-calorie gap between predicted and measured resting metabolic rate (RMR) changes the entire nutrition plan, and explains why generic advice so often fails.

Together, these three markers turn a wellness consultation from a conversation about inputs into a conversation about biology.

How Measurement Becomes Revenue

Metabolic testing isn't just a clinical tool; it's a lead generator and a retention engine.

A baseline test creates a natural entry point for every service you offer. A client with low VO2 max has a clear reason to start a structured training program. Poor fat oxidation points directly to a nutritional or metabolic health protocol. A suppressed RMR signals a need for follow-up monitoring. The data tells clients, and you, exactly where to go next. Instead of presenting a menu of services and hoping something lands, you're presenting a personalized roadmap grounded in their own biology.

Retention follows naturally. Clients who see their numbers improve don't need convincing to come back. Repeat assessments every eight to 12 weeks gives them proof their investment is working and your practice a predictable touchpoint, one of the hardest things to build in any wellness business.

The wellness industry doesn't have a supply problem. It has a measurement problem. As the sector approaches $10 trillion, the practitioners who win long term are the ones who replace guesswork with baselines, and turn those baselines into personalized, measurable journeys that clients actually stay on.​

Forbes Technology Council is an invitation-only community for world-class CIOs, CTOs and technology executives. Do I qualify?