How Is Energy Measured in the Body? From Calories to Biophotons

When we talk about having more energy, we might mean feeling alert, eating enough, or recovering after a busy day. In measurement, however, “energy” needs a more precise definition. Calories, electrical activity, heat, and light emissions describe different things, and each requires its own instruments and interpretation.

Bio-Well’s guide explores this range, from metabolic energy to biophotons. It offers a useful starting point for understanding different measurements, provided we keep established physical quantities separate from broader claims about wellness and biofield coherence.

Calories and joules: energy as fuel

Food supplies chemical energy that the body uses for cellular processes, movement, and heat production. Calories and joules describe quantities of energy. A food kilocalorie is equivalent to 4.184 kilojoules.

The source discusses calorimetry and metabolic carts as ways to assess energy use. These measurements address questions about metabolic expenditure. They are not measurements of motivation, concentration, or how energetic someone feels.

Electrical activity: voltage and frequency

The guide also discusses electrical signals recorded using methods such as ECG, EEG, and EMG. These approaches examine different aspects of heart, brain, or muscle activity rather than measuring the body’s total fuel supply.

Voltage and frequency are distinct quantities. Millivolts describe electrical potential differences; hertz describes cycles per second. Neither is interchangeable with a calorie count. A number is meaningful only when we know what was recorded and how it is being interpreted.

Heart rate variability and body heat

Heart rate variability describes variation in the timing between heartbeats, often expressed in milliseconds. Bio-Well’s article includes it in a broader discussion of body energy, but milliseconds measure time, not energy. HRV should not be read as a single score for overall health or available energy.

Thermal measurements examine heat emitted from the body’s surface. The guide describes infrared thermography and refers to watts per square metre, a measure of radiant power per area. As with electrical recordings, this captures a particular physical signal rather than a complete picture of someone’s wellbeing.

Biophotons: ultra-weak light emissions

The source introduces biophotons as ultra-weak photon emissions associated with living systems and discusses research into their possible biological significance. It cites work by Fritz-Albert Popp and a 2024 review of ultra-weak photon emission.

Photon counts can describe the amount of detected light over a given time and area. Detecting such emissions is a different task from demonstrating that they form an organising communication system, reveal organ health, or explain a person’s fatigue. These broader interpretations require their own evidence.

Where Bio-Well’s claims need context

Bio-Well’s guide contrasts chemical energy with what it calls “informational energy”. It presents GDV imaging as a way to assess patterns, coherence, and energy balance. This is the source’s interpretive framework, not a demonstration that all these measurements belong to one validated clinical system.

In particular, fingertip gas-discharge imaging should not simply be equated with passive measurement of naturally emitted biophotons. Claims that a scan reveals organ-level energy deficits, proves that a treatment worked, or measures an overall state of health need independent clinical validation. The source is published by the company marketing the device.

Why several measurements do not automatically make a diagnosis

Different tools can answer different questions. But combining measurements does not, by itself, validate a new health score or diagnostic claim. The source cites associations between GDV parameters and other physiological measures; an association does not establish that one can replace the other.

A before-and-after change also needs careful interpretation. Without appropriate controls and validation, it cannot by itself show that an intervention caused a health benefit. A device-generated report, a subjective feeling, and a clinical outcome are different forms of information.

The takeaway

There is no single unit that captures everything people mean by “body energy”. Calories and joules quantify energy, while voltage, frequency, heartbeat timing, heat flux, and photon counts describe other specific quantities. Understanding the distinction makes wellness information easier to evaluate and helps prevent one measurement from being asked to prove more than it can.

Use Bio-Well reports as wellness information rather than a substitute for medical assessment or established tests. A scan should not be used to diagnose a condition or explain persistent symptoms on its own.

Sources and further reading

Bio-Well: How energy is measured in the body: from calories to biophotons (10 April 2026).

Rubik and colleagues (2015): Biofield Science and Healing: History, Terminology, and Concepts. Cited in the supplied guide.

Ultra weak photon emission — a brief review (2024). Cited in the supplied guide.

This article is an original, contextualised summary of the supplied Bio-Well guide, not an independent systematic review of its cited studies. It is for general information and is not medical advice.