Earth has a negative charge and when our feet or body touch the earth, we discharge our excess energy, producing a healing effect at cellular level. I grabbed this explanation written by an earthing pioneer, Clint Ober.
"Our innate immune systems use white blood cells (known as neutrophils) to release reactive oxygen molecules (commonly known as free radicals) to oxidise and destroy pathogens and damaged cells. Free radicals have an electron imbalance that makes them electrically charged - in their quest to find a free electron and neutralise, they can attach to, or steal an electron, from a healthy cell, damaging it in the process. The damaged cell then needs to be removed, and the immune system sends another neutrophil to process it, starting the entire cycle over again.
This is how chronic inflammation (which causes chronic pain and promotes many health disorders) is set in motion. This entire response is compounded by the fact that free radical-generating substances are present all around us: in fried food, alcohol, tobacco smoke, pesticides, air pollutants, and even the sun’s rays.
The earth has an infinite supply of free electrons, so when a person is grounded, those electrons naturally flow between the earth and the body, reducing free radicals and eliminating any static electrical charge. The reason grounding is so powerful is it reduces and prevents inflammation from occurring in the body, which in turn prevents inflammation-related health disorders.”
