Tentative Hypothesis of How Earthing Works
Is Earthing Just in Fact of Form of Microcurrent Therapy?
I have a tentative hypothesis that may explain why earthing (grounding) the body creates measurable physiological effects, which can lead to health benefits.
My hypothesis is that
earthing works in conjunction with the constant changes in electric potential in the body caused by the heart beat, and I think to a much greater extent, caused by mains hum-induced electric potential.
Both the heart, and mains hum, induce a time-varying electric potential in the body. This means any earth connection attached to your body will actually "see" a time-varying electric potential (ie, an oscillating voltage) in your body, rather than "see" a body with a fixed, static electric potential.
As a result, while you are earthed, you will constantly have a tiny alternating electric currents moving in and out of your body via the earth connection. This current simply arises from Ohm's law: as the electric potential (voltage) in your body oscillates, a corresponding oscillating electric current will run in and out of the body, with the current always acting to neutralize the continually changing voltage of the body.
These oscillating electric currents running through the body, and in and out of the body via the earth connection will be very small in magnitude, but in this hypothesis, I suggest that these tiny currents are responsible for the physiological effects observed when earthing the body.
Tiny electric currents of microamp (or even nanoamp) magnitude do have physiological effects in the body. Such tiny currents are called
microcurrents, and therapy with these tiny electric currents is known as
microcurrent therapy. Studies such as
this one and
this one demonstrate that microcurrents have antioxidant effects, as well as other therapeutic benefits. Other studies like
this one have shown that microcurrent therapy boosts ATP production in mitochondria.
My hypothesis is that earthing is, in effect, a form of microcurrent therapy, with the microcurrents being generated by the mains hum or heart beat voltage oscillations, which continually drive a tiny alternating electric current in and out of the body via the earth connection.
Note that microcurrent therapy is similar to the well-known
TENS unit electric current therapy, but most TENS units uses much higher current levels, in the millamp range, which has a different range of therapeutic effects compared to microcurrent therapy (therapeutic effects of an electric current depend on the magnitide of the current, and sometimes on its frequency as well).
You may ask: how can I be sure that mains hum electromagnetic emissions, which induce an oscillating electric potential in the body, does drive tiny electric currents in and out of the body when the body is connected to an earth?
Well the proof of this can be found in
this study, which observed that the magnitude of the voltage oscillations produced by mains hum on the body were dramatically reduced by earthing the body: now you can only reduce these voltage oscillations if a current is flowing in or out of the body in order to neutralize them. This is basic electrical theory. Ergo, earthing the body in the presence of main hum will create an oscillating microcurrent running in and out of the body whose frequency is equal to the main hum frequency (50 Hz or 60 Hz).
Note that the main hum-induced voltage oscillations in the body are around 1000 times stronger in magnitude that the heart beat-induced voltage oscillations: the above cited
study says that mains hum can induce voltages in the body as much as 4 volts RMS; whereas the typical voltages arising from the heart beat are just a few millivolts. So if my hypothesis is correct, mains hum will be responsible for most of the physiological effects derived from earthing the body, with the heart beat having only a minor contribution.
In fact, this idea that the physiological effects of earthing derive mostly from main hum provides an explanation of why natural earthing (walking barefoot in the garden, or out in nature in a forest) may not be as effective as earthing performed within the home. People commented
earlier in this thread that they did not experience any effects from barefoot earthing while out in nature, but did experience very strong effects when they earthed themselves at home.
Out in nature there is generally no mains electricity, so therefore no mains hum, so I suggest you will not get the full benefits of earthing, because the voltage oscillations in your body will be only the very weak ones deriving from your heart beat, not the strong voltage oscillations deriving from main hum. So you will have much less current flowing though your body from a natural earth connection when walking barefoot out in nature, compared to earthing at home, and so you may well get less of a therapeutic effect.
In summary: I suggest that the most of the physiological effects produced by earthing may be dependent on main hum, which serves to induce an oscillating electric potential in the body that continually drives microcurrents in and out of the body via the earth connection. Though the heart beat may also play a role in generating much smaller microcurrents.
Thus I suggest earthing may have very little to do with nature, but everything to do with the 50 Hz or 60 Hz hum deriving from the domestic electrical supply!
Which means the view that earthing is "
a connection to the natural energy of the Earth" misses the mark; if my hypothesis is correct, the benefits of earthing may arise primarily from the microcurrents driven in and out of the body by the rather unnatural mains hum-induced voltage oscillations in the body!
What Does This Hypothesis Imply, in Practical Therapeutic Terms?
If my hypothesis is correct, and the physiological effects and benefits of earthing are indeed due to microcurrents generated in the body, it may be a better idea to use a proper microcurrent therapy device, rather than use earthing.
The advantages of using a proper microcurrent therapy device are that you can precisely control the current, and you can accurately apply that current to various different areas of the body. By contrast, in earthing, the microcurrents are not precisely controlled, as their magnitude will depend on factors such as the electrical resistance of your earth connection, and your body's proximity to the electricty suppy that generates the main hum.
Furthermore, the microcurrents in earthing will be alternating currents of 50 Hz or 60 Hz (the mains electricity frequencies used in Europe+Australia, and the USA+Canada respectively). These particular frequencies may not be the most appropriate to apply to the body.
Unfortunately, however, microcurrent therapy units are ludicrously expensive to buy, the cost ranging from hundreds to even thousands of dollars. This is a complete rip-off, because it should not cost more than $10 to $20 to create a simple battery powered device that can supply a few microamps to pass through your body.
There is a list of different microcurrent therapy units
here. The cheapest one on this list is the Matrix MCT Patch, a disposable unit that costs $25 and provides around 200 to 500 hours of use before the battery runs out.