The Human Biofield: What Science Is Beginning to Ask About Living Systems

Most of us were taught to think about the human body in terms of anatomy and chemistry.

Bones. Muscles. Organs. Hormones. Neurotransmitters. Blood. DNA.

All of those are real and important.

But living systems also generate and respond to electrical, magnetic, and even extremely faint light-based activity. That does not automatically prove the existence of an aura, chakras, Reiki energy, or any particular spiritual model. But it does raise a fascinating question:

Is there more happening in and around a living body than our traditional biochemical model describes?

Researchers have been asking versions of that question for decades.

One term that has emerged from that conversation is biofield.

WHERE DID THE WORD “BIOFIELD” COME FROM?

The word sounds very modern, but the idea behind it is much older.

Cultures around the world have long described life in terms of an organizing or animating force—qi, prana, ki, vital force, life force, breath, spirit.

The scientific term biofield entered the modern research conversation in the early 1990s. A historical review published in Global Advances in Health and Medicine describes the biofield concept as an attempt to create a framework for studying biological regulation and some of the phenomena historically associated with energy medicine. [Rubik et al., 2015]

That does not mean science declared an invisible healing field to be proven.

It means researchers needed language for asking questions that did not fit neatly inside a purely chemical description of the body.

That distinction matters.

Science often begins by creating a way to describe something before it fully understands it.

WHAT DO RESEARCHERS MEAN BY “BIOFIELD”?

There is not one universally settled definition.

One group of researchers proposed biofield physiology as an umbrella term for electromagnetic, biophotonic, and other spatially distributed fields that living organisms generate and respond to as part of cellular, tissue, and whole-body regulation. [Hammerschlag et al., 2015]

That is much broader than saying, “Scientists discovered the aura.”

They did not.

Instead, the biofield concept asks whether biological organization may involve communication and regulation occurring across multiple levels—and whether field-like processes deserve more investigation.

That question interests me because it sits right at the place where science and ancient healing traditions begin to look at one another.

Not necessarily agreeing.

But perhaps noticing some of the same mystery from very different directions.

WE ALREADY KNOW THE BODY IS ELECTRICALLY ACTIVE

There is nothing controversial about saying that the human body has measurable electrical activity.

Your heart depends on coordinated electrical signaling.

Your nervous system depends on electrical impulses.

Living cells maintain electrical differences across their membranes.

Those electrical processes also produce associated magnetic fields.

Modern medicine routinely measures some of this activity through technologies such as ECG and EEG.

So a living person is not merely a collection of chemicals.

We are electrochemical organisms.

The more interesting question begins when we ask whether those known electrical and electromagnetic processes account for everything practitioners and spiritual traditions describe as energy—or whether they represent only one measurable part of something larger.

At this point, science does not have a definitive answer.

LIVING CELLS ALSO EMIT LIGHT

Here is one of the more fascinating pieces of established biology.

Living systems emit extremely small amounts of light.

Researchers usually call this ultraweak photon emission, or UPE. A 2019 review of human UPE describes it as a measurable, visually undetectable phenomenon influenced by internal and external factors, including oxidative processes and physiological state. [Calcerrada & Garcia-Ruiz, 2019]

A 2024 review describes UPE as photons produced at extremely low intensities, largely as by-products of cellular metabolism, and notes that improved technology is making these emissions easier to detect and study. [Mould et al., 2024]

Human skin has also been directly imaged for ultraweak photon emission, with changes observed under oxidative stress such as ultraviolet exposure. [Ou-Yang et al., 2019]

Does that mean science has discovered the spiritual light people have described for centuries?

No.

But I still think it is remarkable.

Human beings used the language of light, radiance, energy, and life force long before we had equipment capable of detecting photons emitted by living tissue.

Maybe those ideas are unrelated.

Maybe some ancient descriptions were symbolic.

Maybe people were describing subjective spiritual experiences rather than physical light.

Or perhaps some traditional observations will eventually intersect with biology in ways we have not yet imagined.

We do not have to decide prematurely.

THIS IS WHERE CURIOSITY MATTERS

There is a tendency to approach questions like this from one of two extremes.

One side may say:

“If science cannot currently measure the energy used in Reiki, then it cannot exist.”

The other may say:

“Science has discovered electromagnetic fields and biophotons, therefore Reiki and chakras are scientifically proven.”

I do not find either position especially satisfying.

The first closes the door before the investigation is complete.

The second claims an answer that the research has not actually given us.

There is a much more interesting space between those two positions.

We can acknowledge what is already measurable.

We can respect what is still unknown.

And we can remain open to the possibility that our scientific model of life is still developing.

Because of course it is.

SCIENCE HAS CHANGED ITS MODEL OF THE BODY BEFORE

For much of medical history, people could observe biological effects without understanding their mechanisms.

Microorganisms existed before microscopes made them visible.

Genes affected inheritance long before DNA was understood.

The nervous system changed with experience long before modern neuroscience developed the language we now use for neuroplasticity.

None of that means every unexplained spiritual idea will eventually become established science.

It simply means:

“We cannot currently explain it” and “it cannot be real” are not the same statement.

That difference leaves room for investigation.

And for wonder.

IS THE BIOFIELD THE SAME AS THE AURA?

This is one of the questions people naturally ask.

The most accurate answer is:

We do not know that they are the same thing.

The aura is generally a spiritual or energetic concept describing a field or layers of energy surrounding a person.

The biofield is a research framework intended to investigate field-based aspects of living systems.

There are obvious conceptual similarities.

But using one word does not scientifically validate everything associated with the other.

Personally, I do not need them to be proven identical in order to find the comparison meaningful.

Spiritual traditions developed their language through observation, intuition, embodied experience, and spiritual practice.

Science develops its language through measurement, experimentation, and repeatability.

Those methods are different.

Sometimes they may eventually describe overlapping parts of the same reality.

Sometimes they may not.

WHY THIS MATTERS FOR ENERGY HEALING

When I practice Reiki or other forms of energy work, I am working from a model that says we are more than just our physical structure.

That does not require me to reject biology.

Quite the opposite.

The deeper I look into biology, neuroscience, consciousness, the nervous system, electrical signaling, and emerging biofield research, the more extraordinary the human body becomes.

Energy work does not have to compete with medicine.

Spiritual experience does not have to compete with science.

They can ask different questions.

Medicine may ask:

What disease process is occurring, and how do we treat it?

Biofield research may ask:

How do living systems organize and regulate themselves through forms of information and energy?

Energy healing may ask:

What happens when we intentionally support balance within the whole person?

Spirituality may ask:

Is there an aspect of life that extends beyond what we currently know how to measure?

I think all four questions are worth asking.

WHAT WE KNOW, WHAT WE WONDER

We know that living bodies are electrically active.

We know that biological electromagnetic activity exists.

We know that living cells emit ultraweak photons. [Calcerrada & Garcia-Ruiz, 2019]

We know that researchers have proposed the biofield as a framework for investigating aspects of biological organization that may not fit neatly within a purely biochemical model. [Rubik et al., 2015]

We do not yet know whether these measurable phenomena explain Reiki, chakras, auras, qi, prana, intuitive healing, or the many other experiences people have described throughout human history.

And that is okay.

Mystery is not failure.

Sometimes mystery is simply the place where the next question begins.

For me, that is one of the most exciting places where science and spirituality meet.

SOURCES FOR CURIOUS READERS

Rubik B, Muehsam D, Hammerschlag R, Jain S. Biofield Science and Healing: History, Terminology, and Concepts. Global Advances in Health and Medicine. 2015.

Hammerschlag R, Levin M, McCraty R, et al. Biofield Physiology: A Framework for an Emerging Discipline. Global Advances in Health and Medicine. 2015.

Calcerrada M, Garcia-Ruiz C. Human Ultraweak Photon Emission: Key Analytical Aspects, Results and Future Trends—A Review. Critical Reviews in Analytical Chemistry. 2019.

Mould RR, et al. Ultra Weak Photon Emission—A Brief Review. Frontiers in Physiology. 2024.