ZYTO’s devices include the Balance, the Select (an upgrade to the Balance), the Compass, the Elite (an upgrade to the LSA Pro), and the EVOX. ZYTO software is programmed to recommend products from companies selected by the practitioner. In 2020, the Zyto Web site offered “product libraries” for more than 200 companies, of which at least 25 were multilevel companies. The number of libraries that could be used depended on which ZYTO device was used. Users of the Compass or Balance were limited to one. Users of the Select or Elite devices could select as many as they wanted . In 2011, ZYTO Corporation announced plans to market a Zyto Sphere that would be “particularly well suited” for scanning animals . However, I can find no evidence that it was actually released.
Distribution and Marketing
ZYTO’s “Elite” and “Balance” systems are marketed to professionals, and its “Compass” system is marketed to distributors of health products who sell through direct sales or network marketing channels and to consumers who can lease it for $39.95 per month . A 2008 version of the LSA Pro manual stated:
Using the principles of biology, quantum physics, and the science of information, we facilitate meaningful communication between computers and the human body that is an evolution of bio-feedback. It is a sequence of elegance—the computer poses the question, the body answers, and not a word is spoken—giving healthcare practitioners a better tool to bring wellness to their patients .
It further stated that the device uses galvanic skin response to “measure shifts in the body’s stress system and determine balancers that will move the body back to homeostasis.” Balancers are said to be “stimuli sent to the body that assist in bringing the body back into homeostasis.” They include homeopathic remedies, naturopathic remedies, as well as clinical therapies such as acupuncture and massage therapy.
Click here to hear a “manager at ZYTO headquarters in Utah
answer questions about the meaning of a ZYTO test report.
Testing can be done in the presence of the practitioner or done remotely though the Internet by hooking the hand cradle to the client’s computer. A Compass flier promised “technology that will skyrocket your product sales and have companies rushing to join your downline.”  A flier advertising a 2013 ZYTO regional conference stated that Michael Payne, MS specialized in remote ZYTO scans, had “remote clinics on every continent except Antarctica,” and had personally scanned over 10,000 individuals.
The Elite displays graphics on the computer screen said to represent the “transparent body,” “muscular body,” epidermal body,” “dermatomes” (to display effects of the vertebrae on the body), teeth (for dental assessments) , “5 element overlay” (for Traditional Chinese medicine assessments), and a “stress profile wheel.” According to the company, dots that appear in the graphics reflect whether products are “in range” (suitable for establishing balance) or “out of range” (not suitable).  “LSA” is an abbreviation for “limbic stress assessment.”
One report I have received stated that the device had found 81 “biomarkers” that were “out of range” but could be “brought into range” by using eight products. Click here to view a copy of this report.
The picture to the right shows a screen shot from an LSA Pro Webinar on parasites. The items listed below the human figures are said to represent “Stress Sub-items.” The topmost areas to the right are headed “Stressors,” and the list at the bottom right is labeled “Balancers.” Other Webinars cover attention deficit disorder, autism, constipation, fatigue, fungus, headaches, high blood pressure, inflammation, skin tissues, sleep, and sneezing. The contents of the printed report depends on what the practitioner decides to include.
The Balance employs the same technology as the Pro in a greatly-simplified software interface. The Balance begins with a set of preprogrammed stressors to establish which systems need attention, then automatically assesses products designed to support those areas. A former ZYTO officials says that practitioners can learn how to operate the Balance in a few minutes and learn the basics of LSA operation in a single hour, and advanced techniques in a few more . The Select is an upgrade to the Balance.
The ZYTO EVOX is described as “a reframing biofeedback treatment in which patients receive helpful frequencies which target and unblock built-up, toxic stress and excess energies in the body.” The ZYTO Web site states:
The EVOX uses the voice (VOX is Latin for voice) to create visual maps of a client’s perceptions about specific topics like health, relationships, work, or athletic performance—really any aspect of life. The client speaks about any topic and the EVOX records the energy of the voice. The voice energy is then plotted into what is called a Perception Index, or PI. The Perception Index gives the client a visual image of their perception as it pertains to the topic discussed. . . . With the EVOX system it is possible to quickly and painlessly shift, or reframe, perception at both a conscious and subconscious level. Perception reframing allows for a more mature or functional reality, and can be used to improve any aspect of human performance .
ZYTO Corp. was incorporated in 1998 by Vaughn R. Cook, OMD, who is also the company’s chief executive officer. Its stock is quoted in Pink Sheets under the symbol ZYTO. Its shares began trading in 2006 at a price of $.70. The price per share was 3 cents on May 24, 2009 about 8 cents on July 6, 2011, and about 2 cents on August 26, 2015. The company deregistered on December 4, 2012, which means that it stopped issuing reports to the Securities and Exchange Commission. In 2009, the Compass System Web site stated that ZYTO’s technology had been used by thousands of health professionals around the world, with over 300,000 assessments . Google searches suggest that most of the practitioners in the United States are chiropractors. In 2014, Dr. Cook noted in a Zyto chat that the hand cradle can be used to scan animals if positioned so that all of its six contact points make contact with the animal; otherwise it can be used for a surrogate test (where someone is tested while touching the animal).
The ZYTO Institute (same address and phone number as ZYTO Corp) provides online training. Its Web site offers manuals and many hours of webinar videos. Most of the webinars are presented by Jane Oelke, a Michigan practitioner who is said to have a “Ph.D. in Homeopathic Philosophy and Natural Health Sciences” from the Institute of Natural Health Sciences and a “Doctor of Naturopathy” degree from Trinity College of Natural Health. Neither of these schools is accredited by a recognized accrediting agency.
In 2009, Alternative Growth Streams of Woodstock, Georgia offered ZYTO practitioners a “comprehensive set of business-building marketing tools designed exclusively to empower you to get more clients and make more money with your ZYTO technology.” The tools included an e-mail mailer, direct marketing mailers, and patient handouts. The e-mailer promised that ZYTO assessments will “help you cut down on the time it takes to get better” and “improve your chances of not getting sick in the first place.”
My Testing Confirms That ZYTO Testing Is Untrustworthy
In 2016, I was able to obtain a working ZYTO Elite device and tested myself 43 times in ten days. Sixteen of the tests were “basic” scans that purported to detect problems with 20 body organs. These scans reported an average of 11 problematic organs, but the organs specified and the supposedly corrective products varied considerably from one test to another. I also took 12 food-category tests and 15 individual-food assessments. As with the basic scans, the individual-food scores were wildly inconsistent, with many foods scoring “positive” (recommended) on one test and “negative” (not recommended) on another administered a few minutes later. My basic scan results were so inconsistent that they could not possibly be clinically meaningful. In addition to being inconsistent, my food-category biosurveys recommended excluding so many foods that the resultant diets could be extremely unhealthful. These findings confirmed that the claim that ZYTO devices can provide useful information is preposterous . Curiously, several years ago, ZYTO admitted on its frequently asked questions page that its results were not reproducible:
Q. Are the results reproducible?
A. No. In fact we do not expect them to be. In quantum physics this is referred to as quantum indeterminacy in which the observation or measurement itself affects the results. In effect, we have asked the body a question, received the response, and the body’s energy has shifted in doing so. However, this does tell us that the first question yields the most accurate response because the body’s energy has not yet changed as a result of the question-response event .
The NutriMost Program
For about two years, ZYTO testing was included in the NutriMost Ultimate Fat Loss System developed by Ray Wisniewski, D.C., a chiropractor who practices in Pittsburgh, Pennsylvania and markets the system to other chiropractors. The ZYTO scan was said to “create a personalized and customized plan that will address your body’s top organ stressors as well as finding the best products to balance those stressors.” As part of this, it was said to identify toxins that could stress your body and to prepare customized formulas that provide “energetic resonant frequencies” that have been imprinted onto a special resonant frequency carrier that “provides information to your body’s cells about how to more effectively detoxify.”  Click here to see a NutriMost ZYTO scan report. ZYTO testing was phased out of the NutriMost program in 2016. I believe that NutriMost was ZYTO’s biggest customer.
In April 2017, the Federal Trade Commission announced that NutriMost had agreed to refrain from making unsubstantiated weight-loss and health claims and will pay $2,000,000 to provide refunds to consumers who believe they were misled . A NutriMost official told me that the entire program has been redesigned along standard lines and will undergo a clinical trial that they hope will provide substantiation acceptable to the FTC. Although NutriMost no longer uses ZYTO devices, some of its former franchisees and competitors are still using them.
In 2017, the California Board of Chiropractic Examiners accused Cynthia Benkert, D.C. and Carlos Seals, D.C of a long list of improper acts in connection with operation of their clinic, NutriMost SoCal. The document noted that in addition to making fraudulent claims about ZYTO testing and the NutriMost System, both chiropractors had represented themselves as “licensed” by the Pastoral Medical Association (PMA), which was “not recognized by any regulatory agency as a legitimate governance body.”  About ten days later, Benkert voluntarily surrendered her chiropractic license but continued to do business as PuraVida Wellness. In January 2020, I learned that she is still using ZYTO testing. Seal’s license was revoked in 2018.
In 2017, the Indiana Attorney General and the Indiana Board of Chiropractic Examiners charged Peggy Grabinski-Solano, D.C. with false advertising and failing to practice accordance with the body of scientific systematized knowledge related to the healing arts. The case was settled with agreements under which she was assessed $5,000, placed on indefinite probation, and required to (a) take 24 hours of continuing education, (b) perform 50 hours of community service, (c) pay refunds totaling $4,290 to two patients who had complained to the board, and (d) make full or partial refunds to 142 patients seen between July 1, 2016 and June 11, 2018 who request them [15,16].
EVOX for Treating Cancer Patients
Lee Cowden, MD, who was disciplined by the Medical Board of Texas in 1996 and 2002 and retired from practice in 2009, and is now teaching practitioners how to use a ZYTO EVOX device to treat cancer patients. In a video posted to his site, he states:
With the EVOX, the patient speaks into a microphone. The microphone’s not recording their words, but it’s recording the frequencies that are embedded in their voice. And after 15 seconds of speaking about a person or an event, displayed on the computer screen are all the emotions and all the beliefs that you have about that person or about that event.
What happens then is that the person seeing that on the computer screen, it becomes an aha moment for them at that moment. They see emotional issues that they were not aware of 15 seconds earlier, and so then that gives the brain an opportunity to start a healing process.
In addition to that, the device converts their own voice frequencies into a homeopathic, homochords [PH], basically a higher level of energy that it delivers back to the patient through an electrode that the patient has their hand on, while they are listening to pleasant music and watching faintly flashing lights through their closed eyelids. When we create a marriage between the EVOX therapy and the recalled healing, you get an extremely powerful combination .
ZYTO devices can be purchased or leased with a monthly fee. Its license agreements state that “Purchaser is aware that the purpose of the equipment is to assess the body’s response to certain computer generated stimuli called ‘virtual stressors’, and is not used to diagnose, treat, or cure health conditions or diseases.”  ZYTO’s definition of “stress” differs from popular usage and refers to “the body’s system to maintain balance or homeostasis by counteracting stressors,” which include bacteria, injuries, allergies, lack of sleep, toxins, emotional strain, traumatic events, and “even the requirements of our physical systems (like digestion, adjusting blood pressure, etc.) which are exacerbated by poor health and lack of fitness.” 
ZYTO claims that its devices are comparable to a printed health questionnaire and the pen the patient uses to fill in the blanks. It further claims to have “received documentation from Underwriters Laboratories (UL), a registered FDA consulting organization, stating that ZYTO’s technology is not a medical device and therefore does not require FDA registration.” 
I do not believe that is correct. If a product is labeled, promoted or used in a manner that meets the following definition in section 201(h) of the Federal Food Drug & Cosmetic Act, the FDA will consider it to be a medical device subject to regulatory controls. The official definition of a device is:
- an instrument, apparatus, implement, machine, contrivance, implant, in vitro reagent, or other similar or related article, including a component part, or accessory which is . . . .
- intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease, in man or other animals, or
- intended to affect the structure or any function of the body of man or other animals, and which [is not a drug]. 
Under federal law, “intended use” is determined from the facts surrounding the device’s marketing. It is not determined primarily by the language the manufacturer uses to describe what the device does. If a device requires software to function, the software must also be considered in determining intended use. I assume that ZYTO Corporation realized this because it did register with the FDA and received 510(k) clearance to market the device for “the measurement of galvanic skin response.”  It remains illegal for any such device to be marketed as a diagnostic instrument.
ZYTO customers are led to believe and clearly expect its devices to assess the functioning of their body and to suggest products that can improve it. I believe that the FDA would consider the assessments to be a form of diagnosis and the selection of products to be a form of treatment. I do not believe that using evasive language to describe its procedures can enable ZYTO to nullify its regulatory obligations. The claim that ZYTO devices are equivalent to a history form is preposterous because fill-in forms do not send and receive electrical signals from the body or make product recommendations intended to improve body functions.
ZYTO training videos also advise practitioners to be careful to use language that does not violate laws against unlicensed practice. However, state laws generally consider making health assessments and product recommendations to be diagnosis and treatment regardless of what the practitioner calls them.
A few state boards have considered whether use of a Zyto device should be permitted. In 2015, chiropractors Richard F. Bronson , Michael Bean , and Eric J. Olsen  each signed a consent agreement with the Arizona State Board of Chiropractic Examiners under which they were placed on probation for six months, and ordered to pay a $250 civil penalty and to “cease and desist the use of ZYTO bioscan technology.” Two other chiropractic boards have considered whether EAV devices are “within the scope of chiropractic.” The Oregon Board has said no, but the Arkansas Board has said that the ZYTO can be used as a “nutritional analysis tool.”
In 2015, in response to a complaint from me, Texas Medical Board board concluded that the Web site of Pieter De Wet, M.D., contained improper statements about the ZYTO device, “laser energetic detoxification” with an ASYRA device, and ozone therapy. When notified of a possible violation, De Wet removed the statements at issue plus others that his attorney advised might concern the board in the future. He then signed an agreed order under which he was reprimanded, fined $3,000, and required to take continuing education courses in risk management and ethics .
The FDA is aware that something is wrong. It inspected ZYTO Technologies near the end of in 2014 and subsequently ordered it to stop claiming that its devices are useful for diagnosing problems or selecting corrective products . In 2016, presumably as a result of FDA pressure, ZYTO announced “a voluntary recall of the ZYTO Tower and ZYTO Select and Elite software due to claims exceeding the 510(k) clearance.” [28,29] The company modified some of its marketing language but there is no reason to believe this will influence how its devices are used. The FDA officials in charge of ZYTO regulation have seen my test results and understand how ZYTO devices are used. The fact that they still permit them to be marketed mystifies me.
Zyto Sued by Patients
Between 2008 and 2010, Zyto Corporation was included as a defendant in four lawsuits filed by people who, among other things, had been been tested by a Zyto device during their treatment at the South Coast Center for New Medicine. One of these suits, filed by a California woman named Susan McGreevy, alleged that:
- The clinic’s director, Leigh Erin Connealy, M.D., had engaged in negligent misrepresentation by telling McGreevy that Zyto’s limbic stress assessment (LSA) test would identify “stressors, such as bacteria, injury, allergies, lack of sleep, toxins, emotional strain and traumatic events” that affected her body.
- LSA testing could not identify stressors or therapies or supplements that would alleviate the supposed “stressors.”
- The purpose of the misrepresentations was to induce McGreevy to “undergo an unnecessary and expensive medical treatment, as well as to induce the sale of supplements profitable to Defendants.”
- Zyto’s marketing of its devices for LSA testing constituted unfair competition within the meaning of California’s Business and Professions Code .
A Zyto filing with the Securities and Exchange Commission states that Zyto’s portion of these suits was settled in 2011 with agreements under which the company admitted no fault but paid a total of $10,000 .
The Bottom Line
Skin resistance to an electric current has no value in the diagnosis or treatment of disease. A device claimed to provide information or help with the management of hundreds of diseases and conditions could not be validated without a mountain of evidence substantiating usefulness and reliability. X-ray equipment is approved, for example, because the relationships between x-ray findings and physical findings have been studied in countless millions of cases. As noted above, however, ZYTO’s results are not reproducible, which means that they cannot be validated!
ZYTO scans have no proven practical value and could cause large amounts of time and money to be wasted by people who believe the speculations.
If you have been tested with a ZYTO device and would like to share your experience with me and/or discuss how to seek a refund, please e-mail me a copy of your scan with a brief summary of what happened.
- 16 commonly asked questions about ZYTO technology. ZYTO Corp. Web site, accessed May 24, 2009.
- Morris S. Why a ZYTO scan is like Google for your body. ZYTO Corp Web site, Jan 12, 2018.
- Product lines available in ZYTO libraries. Zyto Corp. Web site, accessed July 30, 2020.
- ZYTO Corp announces expansion into the veterinary market – with pre-order promotion. Business Wire, June 8, 2011.
- Network marketing and sales tool. Compass System Web site, accessed May 24, 2009.
- LSA Pro 2008 User Guide. Orem, Utah: ZYTO Corp., 2007.
- Compass flier ZYTO Corp., copyright 2008.
- Purchase. Bioenergetic Technology Web site, archived July 9, 2009.
- ZYTO EVOX: Life-changing reframing perception reframing technology. ZYTO Web site, accessed Sept 13, 2017.
- Barrett S. Close examination of a ZYTO electrodermal screening system. Missouri Medicine 114:238-244, 2017.
- Questions frequently asked about our technology. Zyto Corp. Web site, accessed May 24, 2009.
- A skeptical look at the NutriMost Fat Loss System. Chirobase.org,
- Marketers of ‘NutriMost Ultimate Fat Loss System’ settle FTC sharges. April 6, 2017. FTC news release, April 21, 2017.
- Accusation and petition to revoke probation. In the matter of the accusation against Cynthia Benkert, D.C. and Carlos Seals, D.C. California Board of Chiropractic Examiners Case No. AC 2017-1133, filed July 10, 2017.
- Assurance of voluntary compliance. In the matter of Priority 1 Medical and Peggy Ann Grabinski-Solano. Hamilton County Circuit/Superior Court, filed June 27, 2018.
- Final order accepting proposed findings of fact, conclusions of law, and order. Before the Indiana Board of Chiropractic Examiners, Cause Number 2017 IBCE 0007, filed July 31, 2018.
- Cowden L. How EVOX helps cancer patients. The Truth about Cancer Web site, accessed Sept 12, 2017.
- Compass licensing agreement. Accessed online on May 25, 2009.
- Stress is your friend. Bioenergetic Technology Web site, accessed May 26, 2009.
- Pink Sheets, Section One, Issuer’s initial disclosure obligations. Undated, issued during 2008.
- Is the product a medical device? FDA Web site, March 1, 2010.
- 510(k) Summary. K11308, Aug 30, 2011.
- Consent agreement. In the matter of Richard F. Bronson, D.C., before the Arizona State Board of Chiropractic Examiners. Case No. 2014-082, May 21, 2015.
- Consent agreement. In the matter of Michael. E. Bean, D.C., before the Arizona State Board of Chiropractic Examiners, Case No. 2014-083, April 28, 2015.
- Consent agreement. In the matter of Eric J. Olsen, D.C., before the Arizona State Board of Chiropractic Examiners. Case No. 2014-084, May 21, 2015.
- Agreed order. In the matter of the license of Pieter Juan De Wet, M.D. Before the Texas Medical Board, April 10, 2015.
- Mitchell LM. Warning letter to Vaughn R. Cook, May 8, 2015.
- Class 2 device recall: ZYTO Tower. FDA Web site, July 1, 2016.
- Class 2 device recall: ZYTO Select software and ZYTO Elite software. FDA Web site, July 1, 2016.
- First amended complaint. Pamela McGreevy vs. Cavitat Medical Technologies, Robert Jones, South Coast Center for New Medicine, Lehigh Erin Connealy, M.D., Alireza Panahpour, D.D.S., Zyto Corp, and Does 1-50. Superior Court of the State of California for the County of Orange. Case No. 30-2010-00368271, filed Nov 3, 2010.
- Zyto Corporation. 10Q Filing with the Securities and Exchange Commission, Sept 30, 2011. (See: 18:R15 Subsequent events.)