What Actually Happens Electrically When the Human Body Is Grounded?
Grounding is often discussed in terms of sleep, inflammation, pain or recovery. But before asking whether grounding affects health, there is a more basic question:
What actually happens electrically when the human body is connected to the Earth?
Researchers have investigated this surprisingly directly. They have measured electrical potential at the skin, mouth and even in venous blood; measured voltage induced in the body by nearby electrical equipment; and built sensitive instruments to detect the tiny currents flowing between a grounded person and Earth.
The short answer is that grounding produces real, measurable electrical changes.
Studies have reported rapid changes in body electrical potential, substantial reductions in induced AC body voltage, and small currents flowing between the body and ground. Some experiments have also reported accompanying changes in physiological or electrophysiological measurements such as skin conductance and EEG activity.
What is much less certain is what those electrical changes mean biologically—and whether they explain the health effects reported in other grounding studies.
That distinction matters.
The Short Answer
When a conductive connection is established between the human body and Earth:
the body's electrical potential can change almost immediately;
voltage induced in the body by surrounding AC electrical fields can fall substantially;
very small electrical currents can flow between the body and ground;
movement-related changes in electrical potential can be reduced;
some physiological and electrophysiological measurements may also change.
These are measurable effects.
What has not yet been firmly established is whether the electrical changes themselves cause improvements in sleep, inflammation, pain, stress or other health outcomes—or exactly what biological mechanism would connect the two.
So the electrical side of grounding is considerably easier to demonstrate than the proposed health mechanisms behind it.
What Does “Grounding” Mean Electrically?
In its simplest form, grounding means creating a conductive pathway between the body and the Earth.
This might occur through direct skin contact with conductive ground outdoors, or through a conductive system connected to Earth ground.
Electrically, an ungrounded human body is not necessarily at the same potential as Earth. The body can also pick up voltage through capacitive coupling with surrounding electrical wiring and appliances.
Once a sufficiently conductive path to ground is provided, charge can move through that path and the electrical relationship between the body and its surroundings changes.
This is basic electrical behavior.
The more interesting research question is what those changes look like when measured in real people.
Study 1: Electrical Potential Changed Within Seconds of Grounding
One of the most direct experiments was published in 2012 by Polish researchers Karol and Pawel Sokal.
They measured electrical potential at several locations in the body, including the:
tongue;
teeth;
fingernails;
and venous blood.
The study included two small experiments. Four people participated in the first, while 12 participated in the second.
In the first experiment, participants were electrically insulated and then connected to Earth through a conductive system.
Before grounding, electrical potential at the measured locations was approximately around 0 millivolts under the experimental conditions.
Once grounding was switched on, the researchers observed a rapid shift to approximately -200 millivolts, including within venous blood.
When the ground connection was removed, the measurements quickly returned toward their original values.
The important finding here is not that every grounded person should have a body voltage of exactly -200 mV. Voltage depends on how and where it is measured and on the experimental reference being used.
The important finding is that establishing and removing the Earth connection produced a rapid and repeatable change in measured electrical potential.
Movement produced another interesting result
The researchers also examined what happened when participants moved vertically.
When participants were electrically insulated, standing up and lying back down caused substantial transient changes in measured potential.
When they were grounded, those movement-related fluctuations were greatly reduced and electrical potential remained much more stable.
In other words, grounding did not simply produce a one-time electrical change. It altered how the body behaved electrically while connected to Earth.
That is a genuine physical effect.
What the experiment did not establish was whether stabilizing electrical potential improves health.
Study 2: Grounding Dramatically Reduced Induced AC Body Voltage
A different electrical question was investigated by physiologist Richard Brown in 2016.
Rather than measuring body potential in a controlled Faraday-cage environment, Brown examined what happens around ordinary electrical equipment.
The study included 50 participants aged 12 to 79.
Participants stood near common office equipment and a desk lamp while researchers measured the AC voltage induced in their bodies. Measurements were taken while participants were ungrounded and then repeated while they were grounded.
The result was substantial:
AC body voltage was reduced by an average factor of 58 when participants were grounded.
This does not mean grounding universally reduces every form of body voltage by precisely 58 times.
The result applies to the electrical environment and setup used in this particular experiment.
But it clearly demonstrates an important principle: connecting the body to ground can substantially alter voltage induced by surrounding AC electrical fields.
What about current?
Brown also measured current while participants were grounded.
The highest average current occurred while participants were physically touching the desk lamp and was approximately 2.62 microamps (µA).
That was far below the 1 milliamp level generally regarded as the threshold at which electrical current becomes perceptible.
The study was actually designed partly to address a concern that grounding people in normal electrical environments might expose them to harmful currents.
Under the conditions tested, the measured currents were extremely small.
It is also worth distinguishing these currents from the natural body-to-ground charge exchange investigated in another study.
Brown was measuring AC current induced by nearby electrical equipment. That is not necessarily the same electrical phenomenon as the tiny low-frequency currents exchanged with ground in a quieter electrical environment.
Study 3: Does Electrical Charge Actually Flow Between the Body and Earth?
This question was tackled particularly directly by electrical engineers at the University of New Hampshire.
In 2014, Kent Chamberlin and colleagues designed sensitive, low-noise equipment specifically to measure current between grounded people and Earth.
The study involved three young male participants and approximately 40 measurements under different conditions.
Despite the small number of participants, the experiment is valuable because its goal was not to test a health outcome. It was simply to investigate grounding as an electrical phenomenon.
And the researchers did detect current.
Once a path to ground existed, electrical charge flowed between the human body and ground.
However, there was an important qualification.
After the initial ground connection was established, the measured current was very small—less than approximately 10 nanoamps (nA).
A nanoamp is one-billionth of an amp.
The researchers also found that changes in current correlated strongly with movement.
What they did not find is equally interesting
The team specifically looked for evidence that the electrical current carried identifiable biological or environmental information.
They examined whether signals corresponding to things such as:
heartbeat;
respiration;
or other proposed Earth-body communication
could be detected.
They could not identify them.
Their conclusion was straightforward: a measurable charge exchange exists between the grounded body and Earth, but the sustained currents are tiny and primarily reflect body movement.
This study therefore supports one part of the grounding concept while placing limits on another.
Charge really does move between the body and ground.
But this experiment does not support the idea that a large or information-rich electrical current is continuously entering the body.
What Happens to the Body Beyond Voltage and Current?
Once researchers established that grounding changes the body's measurable electrical state, another question naturally followed:
Does anything physiological change at the same time?
Several small studies suggest that it may.
Skin Conductance Changed Almost Immediately
A 2010 study led by Gaétan Chevalier examined 28 healthy adults in a double-blind experiment involving real and sham grounding.
Researchers measured several physiological parameters, including:
skin conductance;
respiratory rate;
blood oxygenation;
pulse rate;
and perfusion index.
One of the clearest findings was remarkably rapid.
When grounding was activated, skin conductance decreased in all participants. When grounding was disconnected, it increased again.
The estimated change was around 10% and occurred within approximately 0.5 to 4 seconds.
Skin conductance is influenced by autonomic nervous system activity, so the researchers suggested that the result might reflect a change in autonomic balance.
However, it is important not to take that interpretation further than the measurement allows.
The study measured a rapid change in skin conductance.
It did not directly demonstrate that grounding activated the parasympathetic nervous system, nor did it prove that participants entered a particular state of relaxation.
Several other physiological measures changed during the experiment, while some of the researchers' original predictions were not confirmed.
The overall result is nevertheless intriguing: something measurable happened physiologically within seconds of establishing the electrical connection.
What About Brain Activity?
A much more recent experiment, published by Zahari and colleagues in 2022, examined EEG activity before and during body grounding.
EEG—or electroencephalography—measures electrical activity generated by the brain.
Nine participants between 19 and 30 years old took part in the experiment, with EEG activity recorded from ten electrode positions.
Researchers analyzed theta, alpha and beta frequency bands and reported changes following grounding.
In particular:
theta power and energy increased;
differences were observed in alpha activity in the left-side recordings;
and beta activity changed in right-side recordings.
Those findings are interesting because they suggest that grounding may influence measurable electrophysiological activity.
But this was a very small experiment, and the EEG changes should not automatically be translated into claims such as “grounding improves mood” or “grounding reduces stress.”
Those would be separate clinical conclusions requiring appropriate outcome measures.
For now, the defensible observation is simpler:
EEG patterns changed during the grounding protocol used in this small study.
Grounding Has Also Been Associated With Biochemical Changes
Electrical measurements are not the only findings in this research area.
In 2011, Sokal and Sokal published a series of experiments examining physiological markers while participants were grounded or ungrounded.
Different experiments assessed calcium and phosphorus metabolism, electrolytes, thyroid hormones, blood glucose and immune responses.
The largest involved 84 participants.
Among the findings were changes in serum calcium and phosphorus and reductions in the renal excretion of calcium and phosphorus during overnight grounding.
Other experiments reported changes in electrolytes, thyroid measures and glucose.
These findings are potentially interesting because they suggest that grounding may be associated with effects beyond surface electrical measurements.
But they should not be taken as proof of a particular electrical mechanism.
The studies measured biochemical changes.
They did not demonstrate precisely how the grounding connection caused those changes.
That mechanism remains an open question.
So How Might Grounding Affect Biology?
This is where grounding research becomes more theoretical.
Researchers have proposed several possible mechanisms.
Some have considerably more direct evidence behind them than others.
1. Electrical Potential and Charge Equalization
This is the simplest explanation and the one most directly supported by measurement.
Connecting a conductive body to ground changes its electrical potential and provides a path through which charge can move.
The Sokal, Brown and Chamberlin studies all demonstrate aspects of this phenomenon.
What remains unknown is whether this electrical equalization itself has meaningful biological consequences.
2. Reduced Induced Body Voltage
Grounding can reduce voltage induced in the body by surrounding AC electric fields.
Brown's study demonstrated this clearly under the conditions tested.
Whether reducing this induced voltage provides measurable health benefits is a different question and has not been established by the voltage experiment alone.
3. Electron Transfer and Oxidative Stress
One of the most frequently proposed grounding mechanisms is that electrons supplied through contact with Earth may act as antioxidants and help neutralize reactive oxygen species involved in inflammation.
This is an interesting hypothesis and has been discussed extensively in grounding reviews.
But there is an important gap in the evidence.
Researchers have demonstrated that electrical charge can move between a grounded person and Earth.
They have not directly demonstrated in humans that Earth-derived electrons travel to sites of inflammation and neutralize reactive oxygen species there.
The antioxidant explanation therefore remains a proposed biological mechanism rather than an established fact.
4. Autonomic Regulation
Changes in skin conductance, heart-rate variability and other physiological parameters have led researchers to propose effects on autonomic nervous system regulation.
Again, there is suggestive evidence.
But the distinction between measurement and interpretation matters.
Researchers have measured changes in autonomically influenced variables. Precisely how grounding produces them—and how clinically meaningful they are—requires further investigation.
What Does the Electrical Evidence Actually Establish?
Putting these experiments together, several conclusions can be made reasonably confidently.
Grounding changes measurable body electrical potential
This has been observed directly, including measurements from the skin, mouth and venous blood.
Grounding reduces some forms of induced AC body voltage
In one 50-person experiment conducted around ordinary electrical equipment, grounding reduced induced AC body voltage by an average factor of 58.
Electrical current can flow between the body and ground
Sensitive electrical-engineering measurements detected a small charge exchange once a grounding pathway was established.
The sustained natural current appears to be extremely small
In the Chamberlin experiment, currents after connection were below approximately 10 nanoamps and were strongly influenced by movement.
Acute physiological changes have also been measured
Skin conductance changed within seconds in one sham-controlled experiment, and small EEG studies have reported changes in brain-wave measurements.
These findings make grounding an interesting subject for further bioelectrical research.
But they do not answer every question.
What Has Not Yet Been Established?
The research does not yet establish that:
the measured electrical changes necessarily produce health benefits;
Earth-derived electrons have been shown to neutralize free radicals inside the human body;
changes in body voltage themselves improve sleep, pain, inflammation or stress;
EEG changes demonstrate improved mood or cognitive function;
grounding acts through one single biological mechanism;
or every grounding method produces identical electrical and physiological effects.
Those are important distinctions—not because the measured findings are unimportant, but because understanding what has actually been demonstrated helps identify the most interesting questions still left to answer.
Limitations of the Current Research
The electrical measurements themselves are compelling in the sense that a conductive connection predictably changes electrical conditions.
The biological implications are less certain.
Several important studies are small. The Chamberlin current-flow experiment involved only three participants, the Sokal bioelectrical experiments involved four and 12 people, and the 2022 EEG study involved nine.
Protocols also vary considerably.
Researchers have used:
conductive patches;
sheets;
copper plates;
direct connections to outdoor ground rods;
and electrical-outlet grounding systems.
Environmental electrical conditions also vary between laboratories, homes and controlled spaces such as Faraday cages.
Some grounding research has also been funded by organizations connected with the grounding industry. For example, the 2010 Chevalier study was financially supported by Earth FX, and Chevalier disclosed working as an independent contractor for the company and owning a small number of shares. Brown likewise disclosed being hired by Earth FX for the 2016 voltage study.
Those disclosures do not invalidate the findings, but independent replication would strengthen confidence in the results.
Notably, the University of New Hampshire electrical-engineering study reported no funding source or conflict of interest.
The Bottom Line
So, what actually happens electrically when you ground the human body?
Something measurable happens almost immediately.
Connecting the body conductively to Earth changes its electrical potential. It can substantially reduce voltage induced by surrounding AC electrical fields. And sensitive instruments confirm that very small currents can flow through the resulting connection.
There is also preliminary evidence that physiological and electrophysiological measurements—including skin conductance and EEG activity—can change during grounding.
That makes the basic electrical phenomenon reasonably clear.
The more difficult question is what happens next.
Does changing the body's electrical environment influence biology in a meaningful way? Are tiny charge exchanges involved in the effects reported in sleep, recovery, pain and other grounding studies? Does grounding affect autonomic regulation, oxidative stress or other cellular processes—and if so, by what pathway?
Research has proposed answers to those questions, but it has not yet resolved them.
For now, the evidence supports a cautiously interesting conclusion:
Grounding is a real and measurable electrical interaction between the human body and Earth. What those electrical changes ultimately mean for human physiology and health remains an important—and still developing—area of research.
Research References
Sokal K, Sokal P. Earthing the Human Organism Influences Bioelectrical Processes. Journal of Alternative and Complementary Medicine. 2012;18(3):229–234. DOI: 10.1089/acm.2010.0683.
Chamberlin K, Smith W, Chirgwin C, Appasani S, Rioux P. Analysis of the Charge Exchange Between the Human Body and Ground: Evaluation of “Earthing” From an Electrical Perspective. Journal of Chiropractic Medicine. 2014;13(4):239–246. DOI: 10.1016/j.jcm.2014.10.001.
Brown R. Effects of Grounding on Body Voltage and Current in the Presence of Electromagnetic Fields. Journal of Alternative and Complementary Medicine. 2016;22(9):757–759. DOI: 10.1089/acm.2015.0340.
Chevalier G. Changes in Pulse Rate, Respiratory Rate, Blood Oxygenation, Perfusion Index, Skin Conductance, and Their Variability Induced During and After Grounding Human Subjects for 40 Minutes. Journal of Alternative and Complementary Medicine. 2010;16(1):81–87. DOI: 10.1089/acm.2009.0278.
Sokal K, Sokal P. Earthing the Human Body Influences Physiologic Processes. Journal of Alternative and Complementary Medicine. 2011;17(4):301–308. DOI: 10.1089/acm.2010.0687.
Zahari ZL, Mustafa M, Ab Rahman NA, Abdubrani R, Mat Zain Z. An Effectiveness of EEG Signal Based on Body Earthing Application. International Journal on Advanced Science, Engineering and Information Technology. 2022;12(6):2322–2326. DOI: 10.18517/ijaseit.12.6.14390.
Chevalier G, Sinatra ST, Oschman JL, Sokal K, Sokal P. Earthing: Health Implications of Reconnecting the Human Body to the Earth's Surface Electrons. Journal of Environmental and Public Health. 2012;2012:291541. DOI: 10.1155/2012/291541.
This article is for informational and educational purposes and is not intended as medical advice or as a claim that grounding can diagnose, treat, cure or prevent any medical condition.