Former cable TV executive who originated the grounding hypothesis in the late 1990s. Recognised that the human body, like cable systems, may function better when electrically grounded. Founded EarthFx Inc. and funded much of the foundational research into grounding's physiological effects. Co-author of the book Earthing: The Most Important Health Discovery Ever?

Physicist at the University of California, Irvine. Lead or co-author on the majority of published grounding studies, including the blood viscosity study (2013), HRV research (2011), mood study (2015), and the landmark 2012 review paper in the Journal of Environmental and Public Health. His work spans electrophysiology, autonomic nervous system measurement, and cardiovascular implications of grounding.

Articulated the electron transfer and antioxidant mechanism in his 2007 paper "Can electrons act as antioxidants?" published in the Journal of Alternative and Complementary Medicine. Author of Energy Medicine: The Scientific Basis. Co-author of the 2015 inflammation and wound healing review in the Journal of Inflammation Research — one of the most comprehensive papers on grounding's effects on the immune response.

Board-certified cardiologist who focused on the cardiovascular implications of grounding, particularly blood viscosity and heart rate variability. Co-author of the 2013 blood viscosity study and the 2012 review paper. His involvement brought grounding research into the cardiological discourse.

Research team at Penn State College of Medicine / Hershey Medical Center who conducted the 2017 study on preterm infants in the NICU, published in Neonatology. This is the only grounding study conducted at a major academic medical centre independent of EarthFx funding, making it particularly significant for the credibility of the research field.

Polish physicians who conducted multiple controlled experiments on blood chemistry, glucose regulation, thyroid function, and exercise physiology. Their 2011 study in the Journal of Alternative and Complementary Medicine and 2013 study in Evidence-Based Complementary and Alternative Medicine expanded the evidence base beyond sleep and inflammation into metabolic and exercise recovery domains.

There are now more than 20 peer-reviewed studies documenting measurable physiological changes during and after grounding. These include changes in cortisol, blood viscosity, heart rate variability, vagal tone, inflammatory markers, and mood. The research has been published in legitimate peer-reviewed journals. However, most studies have small sample sizes, and no large-scale randomised controlled trials have been conducted yet. The evidence is substantial and growing, but the field is still developing. Read our full breakdown: Do grounding sheets actually work?

The 2017 Penn State NICU study (Passi et al.) is considered the most independently credible — it was conducted at a major academic medical centre, involved preterm infants (eliminating placebo effect), and showed a 67% increase in vagal tone. The 2013 blood viscosity study is also strong because it measured objective blood parameters, not subjective reports. The 2004 cortisol study is foundational because it measured hormonal changes over 8 weeks with established biomarkers.

The majority of grounding research has been funded by EarthFx Inc., founded by Clint Ober. Key researchers including Gaetan Chevalier and James Oschman have disclosed conflicts of interest as contractors or equity holders in EarthFx. The notable exception is the 2017 Penn State NICU study, which was conducted independently. As with many emerging fields, industry-funded research has built the initial evidence base, with independent replication expected to follow as the field matures.

Research shows that some effects are immediate — the 2006 electrophysiology study documented autonomic nervous system changes within seconds of grounding. Skin conductance drops immediately. Blood viscosity changes were measured after 2 hours. However, hormonal changes like cortisol normalisation took 6–8 weeks in the Ghaly & Teplitz study. Most people who ground consistently report noticeable improvements in sleep and comfort within 2 to 10 weeks.

Yes. Grounding sheets, mats, and patches connect to the earth pin of your home's electrical system, which is physically connected to a grounding rod in the earth outside your home. The Applewhite (2005) study confirmed that conductive bed pads connected to earth ground produced a 70-fold reduction in body voltage — demonstrating that indoor grounding via the electrical system's earth connection is electrically effective. See our setup guide for step-by-step instructions.

No adverse effects have been reported in any published grounding study. Grounding is electrically passive — it connects you to the Earth's natural charge, it does not introduce electricity into the body. The only caution noted in the literature relates to people on blood-thinning medication, as grounding's effect on blood viscosity may complement the medication's effect. As with any wellness practice, consult your healthcare provider if you have specific medical concerns. Read more: Grounding sheets — side effects, safety & what to expect.

Published peer-reviewed studies have documented 12 physiological effects: improved sleep quality (85–93%), cortisol normalisation, reduced blood viscosity, inflammation reduction visible on thermal imaging within 30 minutes, pain reduction, improved heart rate variability, parasympathetic nervous system activation, increased vagal tone in preterm infants, wound healing acceleration, mood improvement, decreased blood glucose in diabetic patients, and 70x reduction in body voltage. See our complete guide to the benefits of earthing.

You can practice grounding for free by walking barefoot on grass, soil, sand, or natural water. To ground indoors — especially during sleep, when your body does its deepest recovery — grounding sheets are the most practical option. They connect to your home's earth via the grounding pin and allow 6–8 hours of continuous contact while you sleep. See our comparison of grounding sheets vs mats to decide which format suits you.