Learn · Biofield Foundations
What Is the Biofield?
The biofield is a term used in several overlapping but different ways—from measurable electrical and magnetic activity in living systems, to broader scientific research constructs, to traditional subtle-energy frameworks. Understanding those distinctions helps separate what science can measure from what remains developing, hypothetical, traditional, or unresolved.
In science, living systems are known to generate measurable electrical and magnetic activity, from the voltage across individual cell membranes to the electrical activity recorded by ECG and EEG and the magnetic fields detected from the heart and brain. Living cells also emit extremely low levels of light known as ultraweak photon emission. These are real, measurable biological phenomena. [3] [6]
In some areas of research, biofield is used more broadly as a framework for investigating whether physical fields, electrical patterning, optical emissions, information, or other processes contribute to biological organization in ways that are not yet fully understood. The term has also been adopted within research on practices such as Reiki and other so-called biofield therapies. [1]
Traditional and spiritual systems use still other frameworks, including qi or ki, prāṇa, chakras, subtle bodies, and aura.
These ideas may overlap in the questions they ask about vitality, embodiment, connection, and human experience, but they should not automatically be treated as different names for the same scientifically established phenomenon.
That distinction is central to understanding what the biofield is—and what science can currently say about it.
The Biofield Is Not One Single Concept
When people use the word biofield, they may be referring to very different things. Separating those meanings makes it possible to explore the subject without confusing measurement, hypothesis, tradition, and personal experience.
Measurable Biological Phenomena
Electrical potentials, ion currents, electrical gradients, magnetic fields, and optical emissions can be detected with appropriate instruments.
Scientific Constructs & Frontier Hypotheses
Researchers investigate whether some physical processes contribute to biological communication or organization in ways that are not yet fully understood.
Traditional & Spiritual Frameworks
Concepts such as qi, ki, prāṇa, chakras, subtle bodies, aura, and Reiki energy belong to particular cultural, contemplative, spiritual, and practitioner traditions.
Human Experience
People may report warmth, tingling, flow, spaciousness, centeredness, or connection during contemplative and healing practices. Experience and demonstrated mechanism are different questions.
Where the Term “Biofield” Comes From
The modern research use of the word biofield developed in the early 1990s in connection with a working group convened around the then-NIH Office of Alternative Medicine.
A later historical review describes the term as an attempt to create broader research language for phenomena and practices that did not fit neatly into conventional biomedical categories. That literature went on to use biofield as an organizing concept encompassing electromagnetic activity and, in some models, additional proposed forms of biological organization or information. [1]
That history is important, but it should not be misunderstood. The fact that a term developed in an NIH-associated research context does not mean that NIH established the existence of a unified subtle field around the human body.
NCCIH, the NIH center that succeeded the Office of Alternative Medicine and NCCAM, has included the human biofield among less-studied aspects of the body that may warrant rigorous fundamental research. [2]
What Science Can Actually Measure in Living Systems
The strongest place to begin is with the electrical, magnetic, and optical activity that biology can already observe directly.
Electrical Activity From Cells to Organs
Electrical activity is fundamental to life. Living cells maintain differences in electrical potential across their membranes because charged ions are distributed unevenly inside and outside the cell. These membrane potentials influence how cells respond to their environment and interact with one another. [3]
This is most familiar in nerves and muscles, but bioelectricity is not limited to the nervous system. Scientists can measure electrical phenomena using techniques ranging from cellular electrophysiology to familiar technologies such as ECG and EEG.
An electrocardiogram, or ECG, records electrical activity associated with the heart. An electroencephalogram, or EEG, records electrical potentials associated with brain activity.
These measurements are not metaphorical uses of the word energy. They are measurements of specific physical quantities.
Magnetic Fields of the Heart and Brain
Electrical currents also generate magnetic fields. The electrical activity of the brain produces extremely weak magnetic fields that can be measured using magnetoencephalography, or MEG. Cardiac activity similarly produces magnetic fields that can be recorded using magnetocardiography, or MCG. [4] [5]
These signals require highly sensitive instrumentation. The important point is straightforward: living tissues can generate physical fields that extend beyond the tissue itself and can be detected outside the body.
That is established biophysics. But it does not follow that these magnetic fields are identical to an aura, qi, Reiki energy, or a broader subtle human biofield. Those are separate propositions and require separate evidence.
Bioelectricity Beyond Nerves
One of the most interesting areas in modern biology is the study of non-neural bioelectricity.
Researchers are examining the roles played by membrane voltage, ion movement, endogenous electrical gradients, and electrical responses in processes such as cell migration, tissue repair, embryonic development, and morphogenesis.
A 2025 review in the Annual Review of Cell and Developmental Biology describes substantial evidence that bioelectricity contributes to diverse morphogenetic contexts while also emphasizing that non-neural bioelectric mechanisms remain less understood than classical nervous-system electrophysiology. [3]
This does not mean the body is controlled by a single invisible electrical blueprint. It does mean that electrical state is increasingly recognized as one part of how cells and tissues coordinate behavior at larger scales.
Beyond Electricity and Magnetism: Ultraweak Photon Emission
Living cells and tissues also emit extremely low levels of light. This phenomenon is known as ultraweak photon emission, or UPE, and is sometimes called biophoton emission.
UPE is associated substantially with oxidative and metabolic chemistry. Reactive molecular processes can produce electronically excited states that release photons, and advances in detector technology are making those emissions easier to study. [6]
The measurement itself is real. What is less certain is what biological role, if any, these photons play beyond their relationship to metabolic and oxidative processes.
Researchers have proposed that ultraweak photons could participate in biological signaling, but a general information-bearing communication network has not been established.
Can the Biofield Be Measured?
The answer depends on what someone means by biofield.
If the term refers to known biological electrical and magnetic activity, then specific components can be measured. ECG and EEG record electrical activity associated with the heart and brain. MEG and MCG detect magnetic fields arising from neural and cardiac electrical activity. Sensitive photon detectors can measure ultraweak photon emission.
But each instrument measures a particular physical signal. Detecting a signal is not the same as proving a broader interpretation of that signal.
A thermal camera, for example, measures infrared radiation associated with surface temperature; producing a visible image around the body does not make it a measurement of an aura. Similarly, a device can produce electrical or optical output without demonstrating that the output corresponds to a proposed subtle human field.
At present, there is no universally accepted instrument that has been demonstrated to measure a single unified subtle human biofield corresponding across Reiki, aura, qi, prāṇa, and related models.
That does not negate the biological signals we can measure. It defines the current limit of what those measurements establish.
Frontier Research
Where Current Science Becomes Frontier Science
Science often advances by studying real observations before their full significance is understood. That is especially true at the edges of bioelectricity, field interactions, photon emission, and quantum biology. These subjects are receiving serious scientific attention, but they do not all have the same level of evidence.
Could Ultraweak Photons Carry Information?
One frontier question is whether ultraweak photons serve biological functions beyond being products of metabolism.
A 2026 review examining a possible neural “biofield” considers whether photons might mediate interactions among neurons. The authors also state that the proposed quantum information coding and decoding have not been experimentally demonstrated in neural tissue and conclude that this form of biofield-mediated neural communication remains largely hypothetical. [7]
There is a measurable phenomenon, a proposed mechanism, and still a substantial gap between the two.
Fields, Coordination, and Biological Organization
Scientists also study situations in which endogenous electrical fields influence nearby biological activity. In neuroscience, for example, local extracellular fields generated by neuronal activity can influence neighboring neural activity under some conditions, a phenomenon known as ephaptic coupling. [10]
Researchers continue to investigate how far electrical states and field-like interactions contribute to larger-scale biological coordination. Those broader interpretations remain less settled than the existence of the underlying electrical phenomena.
What About Quantum Biology?
The word quantum is often used loosely in wellness language, but quantum biology is a legitimate scientific field. Researchers investigate specific circumstances in which quantum phenomena may contribute to biological function, including tunneling, spin-dependent chemistry, energy transfer, and possible magnetic-sensing mechanisms.
A 2026 Proceedings of the National Academy of Sciences article describes quantum biology as the effort to determine when quantum processes genuinely underpin biological function and emphasizes important unresolved questions about measurement and how quantum function might operate at larger biological scales. [8]
Evidence that quantum effects occur in some biological systems does not automatically establish quantum healing, a quantum human biofield, Reiki transmission through entanglement, or nonlocal healing intention. Each proposition requires its own evidence.
Quantum biology should expand the questions we are willing to investigate, not lower the standard of proof.
Newer “Photonic Biofield” Hypotheses
Recent research is also revisiting whether ultraweak photon emissions may display forms of organization or coherence worth deeper investigation.
A 2026 BioSystems paper proposed the term photonic biofield as a heuristic framework for investigating whether ultraweak photon emissions show forms of organization, coherence, or information-bearing behavior. This is a frontier proposal rather than an established biological model. [9]
Whether such a photonic system plays a meaningful coordinating role in living organisms remains unresolved.
Traditional Ways of Understanding Vitality and Subtle Energy
Long before modern instruments could measure membrane voltage, magnetic fields, or photons, many cultures developed their own frameworks for thinking about vitality, embodiment, breath, consciousness, and relationship.
Qi and Ki
In Chinese philosophical and medical traditions, qi is associated with vitality, function, movement, relationship, and patterns of life. The Japanese term ki is historically related to qi and appears in multiple Japanese traditions and practices, including Reiki.
These concepts are often translated into English as energy, but that translation can be misleading if it causes readers to equate qi or ki directly with electrical energy or electromagnetic fields.
Qi and ki can be explored alongside biological science without pretending that they have been scientifically identified as electricity, magnetism, or photons.
For the Reiki-specific tradition and practice context, see What Is Reiki?
Prāṇa, Nāḍīs, and Chakras
Indian yogic and tantric traditions developed their own subtle-body frameworks. Prāṇa is closely associated with vitality, breath, and life processes. Many systems describe nāḍīs, or subtle channels, together with cakras or chakras, whose structures and functions vary among texts and traditions.
There is no single historically universal chakra system. Scholarship on Hindu and Buddhist tantric traditions documents numerous subtle-body systems with different structures, meanings, and ritual uses. [11]
The familiar modern seven-chakra system is influential, but it should not be presented as the only ancient model. Nor should chakras be described as scientifically established endocrine glands, nerve plexuses, or anatomical organs.
Aura and the Subtle Body
Ideas of a subtle body also have long and varied histories. Indian, Buddhist, Western esoteric, philosophical, occult, and modern spiritual traditions have developed different ways of conceptualizing aspects of embodiment beyond ordinary gross anatomy.
Modern Western ideas about layered subtle bodies and aura were shaped by a complex history involving Western esotericism, Theosophy, interpretations of Asian traditions, psychology, and later spiritual culture. [12]
It is therefore too simple to say that every ancient culture discovered the same biofield and merely gave it a different name. The modern word biofield can bring these frameworks into conversation without making them historically or scientifically identical.
Experience, Meaning, and Measurement Are Different Questions
People sometimes describe physical or emotional sensations during contemplative and healing practices, including warmth, tingling, pulsing, heaviness, lightness, spaciousness, flowing sensations, deep stillness, emotional release, or a sense of connection.
Those experiences can be meaningful to the person having them. But an experience does not automatically identify its physical cause.
A sensation of warmth, for example, does not by itself tell us whether it arose from circulation, attention, touch, expectation, nervous-system activity, emotional response, another physiological process, or something not yet characterized.
The same principle works in the opposite direction. If science has not established a specific mechanism for a person’s experience, that does not make the experience meaningless.
What a person experienced and what mechanism has been demonstrated to produce it are different questions.
So, What Can We Say With Confidence?
Established
Living organisms generate measurable electrical activity, membrane potentials, ion currents, electrical gradients, and magnetic fields.
Measured / Observed
Living cells and tissues emit ultraweak photons associated substantially with metabolic and oxidative processes. [6]
Supported but Developing
Bioelectric signaling contributes to biological organization beyond conventional nerve and muscle activity, including areas of development, cell coordination, regeneration, and morphogenesis. [3]
Emerging / Frontier
Researchers continue to investigate broader roles for electrical fields, optical emissions, coherence, information, and quantum processes. Their evidentiary support varies substantially, and several proposed mechanisms remain hypothetical.
Traditional / Spiritual
Qi, ki, prāṇa, chakras, subtle bodies, aura, and Reiki energy are meaningful concepts within particular traditions and practices. They should not be presented as biomedical facts merely because comparable language is used in modern wellness settings.
Unresolved
Science has not established that traditional subtle-energy concepts are identical to known electrical, magnetic, optical, or quantum phenomena, nor has it established a single unified subtle human biofield that accounts for all of these domains.
That boundary is not a reason to stop investigating. It is what makes rigorous investigation possible.
From the Biofield to Biofield Therapy
Understanding the concept of a biofield is different from asking what biofield therapies are or whether particular practices produce measurable effects.
In research literature, practices including Reiki, Therapeutic Touch, Healing Touch, and external qigong have been grouped under the broad category of biofield therapies. A 2025 scoping review mapped a substantial published clinical-research literature while also documenting major differences in methods, interventions, and results. [13]
Classification does not establish a shared physical mechanism.
For Reiki specifically, NCCIH states that the proposed energy field involved in the practice has not been scientifically demonstrated and that research on health-related effectiveness remains inconsistent. [13]
Explore What Is Biofield Therapy? for the practice category, or visit Evidence & Research for the deeper evidence pathway.
Sources & Further Reading
This page distinguishes established measurements from developing interpretations, frontier hypotheses, traditional frameworks, and unresolved questions. Sources below were reviewed for this article and will be updated as the research develops.
- Rubik B, Muehsam D, Hammerschlag R, Jain S. Biofield Science and Healing: History, Terminology, and Concepts. Global Advances in Health and Medicine. 2015. PMID: 26665037.
- National Center for Complementary and Integrative Health. Objective 1: Advance Fundamental Science and Methods Development. NCCIH Strategic Plan 2021–2025.
- Nunes CO, Barriga EH. Bioelectricity in Morphogenesis. Annual Review of Cell and Developmental Biology. 2025. PMID: 40829786.
- Yang Y, et al. From bench to bedside: Overview of magnetoencephalography in basic principle, signal processing, source localization and clinical applications. NeuroImage: Clinical. 2024. PMID: 38653131.
- Roth BJ. The magnetocardiogram. Biophysics Reviews. 2024. PMID: 38827563.
- Mould RR, et al. Ultra weak photon emission—a brief review. Frontiers in Physiology. 2024. PMID: 38420619.
- Pospíšil P, Prasad A. Biofield in neural communication: A review and conceptual framework. Progress in Biophysics and Molecular Biology. 2026. PMID: 41724272.
- Scholes GD, Fleming GR. What is quantum biology?. Proceedings of the National Academy of Sciences. 2026. PMID: 41860951.
- Sá R. Coherent photonic biofields: Revisiting Fritz-Albert Popp’s hypothesis. BioSystems. 2026. PMID: 42409159.
- Pinotsis DA, Miller EK. Cytoelectric coupling: Electric fields sculpt neural activity and “tune” the brain’s infrastructure. Progress in Neurobiology. 2023. PMID: 37210066.
- Hayes GA. Esoteric Physiology and Subtle Body Systems. The Oxford Handbook of Tantric Studies. Oxford University Press.
- Cox S. The Subtle Body: A Genealogy. Oxford University Press. 2021/2022.
- Sprengel ML, et al. Biofield Therapies Clinical Research Landscape: A Scoping Review and Interactive Evidence Map. Journal of Integrative and Complementary Medicine. 2025. PMID: 39854162.
- National Center for Complementary and Integrative Health. Reiki.