The Science of Reiki and Its Impact on Energy Healing
- Healing Light Reiki Training Center - Orem, Utah

- Dec 30, 2025
- 3 min read
Reiki has gained popularity as a form of energy healing that promotes relaxation, reduces stress, and supports overall well-being. But how does Reiki actually work? What is the science behind this ancient practice that many people find effective? This post explores the principles of Reiki, the scientific research related to energy healing, and how this practice impacts the body and mind.

What Is Reiki and How Does It Work?
Reiki is a Japanese technique developed in the early 20th century by Mikao Usui. It involves a practitioner placing their hands lightly on or just above the recipient’s body to transfer energy. The goal is to balance the body’s energy flow, which is believed to support natural healing processes.
The core idea behind Reiki is that the body has an energy field that can become blocked or imbalanced due to stress, illness, or emotional challenges. Reiki aims to clear these blockages and restore harmony. Practitioners describe this energy as universal life force energy, which flows through all living things.
The Energy Concept in Reiki
The concept of energy in Reiki is not energy in the scientific sense like electricity or magnetism. Instead, it refers to a subtle energy or biofield that surrounds and penetrates the body. This biofield is thought to influence physical, emotional, and mental health.
Many traditional healing systems, such as acupuncture and qigong, also work with similar energy concepts. While Western medicine has not fully embraced these ideas, some research suggests that the body’s biofield may play a role in health and healing.
Scientific Research on Reiki and Energy Healing
Scientific studies on Reiki face challenges because energy healing is difficult to measure with conventional tools. However, several studies have explored Reiki’s effects on stress, pain, and well-being.
Stress reduction: Research shows Reiki can lower cortisol levels, the hormone linked to stress. Lower cortisol helps reduce anxiety and promotes relaxation.
Pain management: Some clinical trials report that Reiki helps reduce pain in patients with chronic conditions, such as arthritis or cancer.
Improved mood: Reiki sessions often lead to improved mood and decreased symptoms of depression and anxiety.
A 2017 review published in the Journal of Evidence-Based Complementary & Alternative Medicine analyzed multiple studies and found that Reiki may have positive effects on pain and anxiety, though more rigorous research is needed.
How Reiki Affects the Body and Mind
Reiki’s impact on the body may come from several mechanisms:
Activation of the parasympathetic nervous system: Reiki promotes relaxation by activating the body’s rest-and-digest response, lowering heart rate and blood pressure.
Release of endorphins: Energy healing may stimulate the release of natural painkillers, reducing discomfort.
Placebo effect and expectation: The calming environment and focused attention during Reiki sessions can enhance feelings of well-being.
The mind-body connection plays a crucial role in Reiki’s effectiveness. When people feel relaxed and cared for, their bodies can better manage stress and heal.
Practical Examples of Reiki in Healthcare
Reiki is increasingly used as a complementary therapy in hospitals and clinics. For example:
Cancer centers offer Reiki to help patients cope with pain, nausea, and anxiety during treatment.
Hospice care includes Reiki to improve comfort and emotional support for patients nearing the end of life.
Mental health professionals incorporate Reiki to reduce symptoms of anxiety and depression alongside traditional therapies.
These examples show Reiki’s potential to support conventional medicine by addressing emotional and energetic needs.
What Science Still Needs to Understand
Despite promising findings, science has not fully explained how Reiki works. Key questions remain:
What exactly is the energy involved in Reiki?
How does this energy interact with the body’s cells and systems?
Can energy healing be reliably measured and reproduced in clinical settings?
Ongoing research using advanced imaging and biofield measurement tools aims to answer these questions. Meanwhile, many practitioners and patients report benefits based on experience and observation.
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