They are appearing more and more often in webshops with sleep products: the earthing sheet and the grounding mat. These are products that you connect to a power outlet with a cable. They are said to ‘ground’ your body, just like walking barefoot on the beach. The promises are bold: deeper sleep, less stress, less inflammation, and even less pain. It sounds almost too good to be true, and that’s exactly what makes people curious. Because if grounded sleep can do all that, why isn’t half of the Netherlands and Belgium sleeping under one? The short answer: an earthing sheet does something you can measure, but the idea that it helps you sleep better hasn’t been convincingly proven yet. So, what’s the deal exactly? Time for a down-to-earth look at what “earthing” does to your body and what the research really says about it.
What is earthing, and what does an earthing sheet do?
Earthing, also known as earthing or grounding, means that you electrically connect your body to the earth. An earthing sheet or grounding mat contains conductive threads, often made of silver, woven into the fabric. Via a thin cable, the sheet connects to the grounding contact of a grounded outlet, or to a rod that you stick into the ground outside. This way, your skin makes contact with the earth, even while you sleep.
The idea behind it comes from the United States. Your body is said to absorb negatively charged electrons from the earth through the skin. These electrons are supposed to neutralize free radicals, reduce inflammation, and restore your ‘electrical balance’. Because we hardly ever walk barefoot anymore and go through life on rubber soles, we are said to miss that contact with the earth.
Does an earthing sheet really work?
Here’s the good news: there is a core of real physics in it. Your body builds up a small electrical voltage relative to its surroundings, partly due to the wiring and appliances in your home. If you connect yourself to the earth, that voltage drops toward zero. You can measure this with a simple voltmeter, and from an electrotechnical standpoint, it’s simply correct. Sellers love to show this: first a number on the screen, then connect the sheet, and the number drops.
It only gets shaky at the next step: the assumption that a lower body voltage also means you sleep better, have less stress, or fewer inflammations. That is not an established fact, but a hypothesis. The fact that a meter shows a change therefore says nothing about how you feel in the morning. It’s exactly this distinction that often gets lost in many product descriptions.
What does the research say about grounded sleep?
The study most often cited is the one by Ghaly and Teplitz from 2004. Twelve people with sleep problems, pain, and stress slept on a conductive mattress cover for eight weeks. After six weeks, their cortisol, the stress hormone, was lower at night, and most participants said they slept better and had less pain. Interesting, but it involved only twelve people, without a control group, and the improvement in sleep was largely based on their own feelings. If you know you’re lying on something ‘healing’, you sometimes actually sleep better. That’s called the placebo effect, and it cannot be ruled out in such a setup.
A 2015 review by Oschman, Chevalier, and Brown is also often mentioned as evidence. It mainly describes the theory behind earthing and inflammation, based on smaller studies and practical stories. It is not a systematic overview of all research, and the authors themselves are closely involved in the earthing movement.
The 2025 study
In 2025, a better-designed study from South Korea was published. Sixty participants were randomly divided into two groups: one group slept on a grounded mat, the other on a mat that looked the same but wasn’t grounded. No one knew who had what, including the researchers. After 31 days, the grounded group scored better on questionnaires about sleep quality, insomnia, and daytime sleepiness, and slept longer on average than the control group (Park and colleagues, 2025).
That is the right way to test, and it deserves an honest mention. But the researchers themselves call it a pilot study, it involved only one mat and one group of people, and the outcomes are mainly questionnaires. Furthermore, the same research group previously collaborated with the manufacturer of such a mat for a study on rats. One promising small study does not yet constitute hard evidence; for that, the result must be repeated by independent researchers.
Independent organizations come to the same conclusion. For example, the Sleep Foundation writes that research into earthing and sleep is limited and that more studies are needed.
What does this mean for your bed?
An earthing sheet is technically a fitted sheet or cover with conductive threads. It therefore doesn’t replace a good mattress or a suitable pillow, and what you feel beneath your body remains the deciding factor for your comfort. Anyone considering such a sheet will quickly encounter a few practical aspects. It only works via a grounded outlet, and in older homes, not every outlet is grounded. The silver in the fabric requires special washing, without fabric softener. And the conductive part must touch your skin, because under a regular sheet or a mattress protector, it does nothing.
Regarding safety, the manufacturers themselves are the main source: they build a resistor into the cable that should limit the current in case of a defective device. Independent safety tests of such products are hard to find.
It also brings to mind other sleep products with a strong story. With a weighted blanket or a silk pillowcase, you see the same pattern: a plausible idea, a few small studies, and many enthusiastic users. That can go perfectly well with real satisfaction, but of course, that’s something different from a proven effect.
Measurable, but not yet proven
So, earthing isn’t outright nonsense, but it’s not a miracle cure either. It does something measurable to your body voltage; whether you notice anything from that in the morning is a completely different question. Perhaps the most interesting question isn’t whether the sheet works, but why you’re looking for it. If you’re lying awake due to stress, the approach with the strongest evidence is something else entirely: cognitive behavioral therapy for insomnia has been extensively researched. And if you already sleep reasonably well but want to optimize it, it’s good to know that being too preoccupied with perfect sleep can in itself keep you awake.
Anyone who wants to try an earthing sheet can certainly do so, with realistic expectations. Not based on a promise that the research hasn’t yet fulfilled.
Frequently Asked Questions
Does an earthing sheet really work?
An earthing sheet measurably lowers your electrical body voltage. Whether this helps you sleep better hasn’t been convincingly proven. There are some small studies with positive results, but large-scale and independent research is lacking.
What does earthing do to your body?
Earthing brings your body’s electrical voltage toward zero by connecting you to the earth. That part is physically correct. The broader health effects, such as reduced inflammation or less stress, are a hypothesis.
Is grounded sleep scientifically proven?
No, not definitively. The best-known study had twelve participants without a placebo group. A better study from 2025 with sixty participants found positive effects on questionnaires, but this still needs to be repeated by independent researchers.
Do you need a grounded outlet for an earthing sheet?
Yes. An earthing sheet works via the grounding contact of a grounded outlet, or via a grounding rod that you stick into the ground outside. Without grounding, it’s just a sheet.
Resources
- Ghaly, M. and Teplitz, D. (2004). The biologic effects of grounding the human body during sleep as measured by cortisol levels and subjective reporting of sleep, pain, and stress. Journal of Alternative and Complementary Medicine, 10(5), 767-776. doi.org/10.1089/acm.2004.10.767
- Oschman, J. L., Chevalier, G. and Brown, R. (2015). The effects of grounding (earthing) on inflammation, the immune response, wound healing, and prevention and treatment of chronic inflammatory and autoimmune diseases. Journal of Inflammation Research, 8, 83-96. doi.org/10.2147/JIR.S69656
- Park, H. J., Lee, G. R., Kim, Y. et al. (2025). A randomized, double-blind, placebo-controlled study on the improvement of sleep quality with Earthing mat. Advances in Integrative Medicine, 12(3), 100458. doi.org/10.1016/j.aimed.2025.01.005
- Sleep Foundation (2024). Do grounding sheets and channeling Earth’s energy help you sleep? sleepfoundation.org