The following scientific theory of Reiki shows that at least some of the healing aspects of Reiki have been demonstrated to exist using known laws of physics and biology.

An important part of the functioning of the human body is its electrical nature. There are electrical currents flowing through the nerves, through the blood, and through all the organs and cells. And while these currents are very weak when compared with the electrical current flowing through the wiring in your home, they are exactly the right strength for the human body and in fact are a necessary part of its life-sustaining processes.

This idea is demonstrated by the electrocardiogram, which is a medical instrument used to measure the electrical activity of the heart. It's interesting to note that this electrical activity can be measured anywhere on the body, showing that the heart's energy is present throughout the body. There are similar instruments to measure the electrical activity of the brain and nervous system (an electroencephalogram) and the muscles (an electromyogram).

Ampere's Law states that when an electric current flows through a conductor, an electromagnetic field is created around the conductor. Therefore every cell, tissue, and organ in the body has its own electromagnetic field. There are medical devices used to measure the body's magnetic fields. The measuring of the magnetic field is more accurate method of measuring the activity of the body's organs than measuring the electrical activity because the tissues do not affect the magnetic fields they travel through whereas electrical currents do. Some of these devices have similar names to those that measure the electrical activity - magnetocardiogram, magnetoencephalogram, and the magnetomyogram.

Another one of these devices is called a SQUID (Superconducting Quantum Interference Device) and has been used worldwide to study the electromagnetic nature of the human energy field.

Faraday's Law of Electromagnetic Induction states that a change in an electromagnetic field will induce a similar change in electrical flow in conductors close by and therefore in their electromagnetic fields. In this way, every aspect of the human body, mind, and emotions are connected to and affecting each other through electromagnetic induction. This scientifically based understanding validates the basic concept of holistic medicine.

Through the use of magnetograms, it has been found that each organ in the body has a pulsating electromagnetic field. When the organ is healthy, it pulses within a certain range of frequencies, but when it is unhealthy, it moves out of this range. As an example, the healthy range for nerve tissue is in the 2 Hz range; the range for bone is around 7 Hz; for ligaments it is around 10 Hz; and higher frequencies are needed for skin and capillaries. It has also been found that the heart creates the strongest field, which has been measured to a distance of fifteen feet.

The hands of healers have been found to produce strong pulsating electromagnetic fields, whereas pulsating fields are not found around the hands of non-healers. When a healer treats someone who is sick, the healer's hands begin pulsating at a rate that unhealthy organs or tissues they are treating need to be healthy. Through the process of magnetic induction or Faraday's Law, the healer's hands induce the healthy frequency into the unhealthy electromagnetic field of the organ thus helping the organ to return to a healthy state.

   - William Lee Rand
     President of the International Center for Reiki Training