About Biofeedback


Your skin, and much of the rest of your body for that matter, conducts electricity. If your body didn’t conduct electricity, touching a high-voltage fence or sticking a knife in an electric socket would have no effect on you. We wouldn’t be alive without electricity because body functions are controlled by electrical signals.

The skin in particular is a good conductor of electricity, so even a weak electrical signal introduced to the skin can be measured. By applying a constant, unperceived level of voltage to the skin, we can get a baseline reading of the skin’s conductance. 

A Measurable Reaction

The baseline reading of skin conductance is referred to as tonic conductance. This conductance level is different for everyone, but it usually ranges from 10 to 50 very small units of conductance called microsiemens. Tonic skin conductance levels also vary based on the person’s psychological state and autonomic regulation at the time the measurement is taken.

While tonic skin conductance is a baseline measurement, phasic conductance changes are the result of the body responding to external stimuli. This increase in conductance compared to the baseline can be observed shortly after a subtle stimulus such as a smell, a sound, an image, or a question is introduced.2

Phasic changes can be observed when the skin’s sweat ducts fill in response to a stimulus. After the sweat is deposited or absorbed by the skin, conductance returns to tonic levels. According to Edelberg’s widely accepted sweat circuit model, the extent of this increase can be measured by the amount of sweat and number of sweat glands activated.

Why You Need A ZYTO Scan

With so many choices available today, deciding which nutritional products to take can be a difficult task to say the least. Most people use a try-it-and-see approach, which can be a costly and time-consuming process. But there’s a much better way to decide from among the multitude of wellness options available to you.

Beyond Nutrition Scanning

Scanning the body for biological preference to nutritional products is a key component of ZYTO Technology. Items that can be scanned for include supplements, essential oils, and skin-care products. Additionally, your body can also be scanned for its preference to foods, wellness services, and lifestyle options.

Bioscan Options

The ZYTO software contains more than 40,000 digital signatures representing actual items. These include not only products from over 200 nutritional product companies, which we call balancer Virtual Items, but also thousands of items representing internal body systems as well as external factors which are called stressor Virtual Items.

A practitioner can scan you for as few or as many of these items as desired based on your needs and specific wellness goals. Generally, a bioscan consists of scanning for stressors, and then scanning balancers to determine the top items that will bring the most stressors back into range, or balance.

Personalized Information Equal Better Decisions

Along with determining your body’s preference to products scanned for, a ZYTO bioscan can provide a wealth of additional information about the body. ZYTO reports can reveal correlations, patterns, and trends in the items that you were scanned for. Your practitioner can use this information to ask better questions and reveal additional key information to help you remove the barriers preventing you from achieving optimal wellness.

The potential benefits of biofeedback have been well-researched. Some of the common health concerns that biofeedback can address include:

While galvanic skin response was first used in the field of psychoanalysis in the early 1900s, acupuncturists began experimenting with the technology in the 1930s. In the early 1950s, the celebrated German physician Reinhold Voll developed a device that measured the electrical potential of skin by means of a stylus that was manually applied to an acupuncture point.

Similar to detecting truth and lies when hooked up to a polygraph machine, ZYTO biocommunication technology can determine if the body’s response to a digital signature of an actual stimulus is in range or out of range (and by how much) compared to the baseline reading. Digital signatures of specific nutritional products, for example, are posed as questions to the body, and the body responds directly via galvanic skin response. Because the computer communicates directly with the body, the subjectivity that occurs when questions are asked, perceived, and responded to (as with a polygraph test) is eliminated.

While ZYTO technology isn’t diagnostic, it provides a wealth of information that can be used to make better wellness decisions. Focusing on the stressor Virtual Items that are out of range as well as the biologically coherent balancer Virtual Items can greatly assists wellness professionals and their clients as they seek to better manage stress load and improve overall well-being.

The ZYTO bioscan relies on galvanic skin response (GSR)—an established technology that measures fluctuations in electrical conductivity of the skin. One familiar application of GSR is lie detector testing.

Biocommunication technology utilizes the ZYTO Hand Cradle to gather galvanic skin response readings. The Hand Cradle offers a number of advantages over other GSR and EDS devices, including:

  • Was developed by energetic medicine pioneer Dr. Vaughn R Cook, who has 30+ years of clinical experience
  • Has 6 large contact points to maximize accuracy (most EDS devices only have 2 points of contact)
  • Is the only FDA-cleared wellness scanner of its kind
  • Can scan items quickly—about 100 Virtual Items per minute

We do have telehealth services available; you do not have to be local to be a client. You will receive everything you need for a wellness visit. If you own your own ZYTO cradle, you can receive extra discounts. Please inquire if this is something that interests you.

ZYTO hand cradles are the only FDA-cleared wellness scanner of its kind.