COVID-19: News & Updates

Drop down the corresponding tab below to see full details or links to more information

  • Clinic Hours and Availability
  • What Riordan Clinic is Doing to Keep Patients & Staff Safe
  • Updates from Dr. Ron Hunninghake, Chief Medical Officer at Riordan Clinic
  • Doctor Call Time
  • Virtual Appointments with a Riordan Clinic Provider for Return and Follow-Up Visits

Just like so many other areas of our health, our immune system has its own unique set of needs and requirements to function properly and provide optimal support and prevention throughout the year. Although it is nearly impossible to guarantee that we won’t be susceptible to a specific germ, virus, or illness, we can take preventative measures to do the best we can to be prepared. When it comes to germs and viruses, there are several things that we need to consider in addition to just taking supplements or medications.

Washing hands, sanitizing surfaces in our homes and workplaces, being mindful of passing and receiving germs with others, getting adequate rest, drinking plenty of water, exercising regularly, eating a nutrient-rich whole foods diet, reducing stress and other daily choices can be powerful tools in living a life focused on REAL HEALTH. These practices also help our body to remain strong, well-fueled, and more capable of fighting off unwanted sicknesses.

Questions? Please direct them to:


  • Clinic Hours and Availability

    The Riordan Clinic is open regular business hours and invite patients and Nutrient Store customers to visit while utilizing the following safety guidelines:

    While no longer required, the use of a face mask is still strongly encouraged when a distance of 6 feet cannot be maintained.

    To schedule an appointment (including phone appointments), schedule an IV or therapy, or schedule a lab draw please call:

    • Wichita: 316-682-3100 x367
    • Hays: 785-628-3215
    • Overland Park: 913-745-4757

    Order supplements through our secure online Nutrient Store (shipping is just $5 flat rate for any U.S. order) or by calling 316-682-3100. Our on-site stores are open for pick-ups or purchases.

    In order to help slow the spread of disease and to protect our staff and other patients, please do not visit if:

    • You have a fever over 100°
    • Have tested positive for COVID-19
    • Have known exposure to the COVID-19 virus
    • Have a cough and/or respiratory problems such as shortness of breath or difficulty breathing
    • If you are experiencing chills and/or repeated shaking with chills
    • If you are experiencing muscle pain or headache
    • If you have a sore throat
    • If you have a new loss of taste or smell
  • What Riordan Clinic is Doing to Keep Patients & Staff Safe

    Over the past several weeks we have implemented many changes that are designed to help increase our already stringent protocols for patient and staff safety. The following is a list of things that we are doing, or have continued, in light of the current concerns. This list will continue to be updated as new information is available. These are listed in no particular order:

    • We are currently having patients forego physically signing credit card slips.
    • We have made the credit card machines accessible to patients so they can insert their own cards.
    • We are screening patients while in scheduling calls and then again before their appointment or treatment during reminder calls.
    • Continued cleanliness including wiping down everything with a disinfectant in between all patients and guests.
    • Chairs are spaced away from the reception desks and apart from each other.
    • The clinic has either spaced apart IV chairs and limited the IV schedule.
    • Nurses are wiping every surface, including signature pads, chairs, tables, etc, in between every person.
    • Our doctors are writing articles, recording videos, doing interviews, and any other opportunity we have to educate the general public on maintaining health during this time. These are all linked to on this page under the various drop-down tabs.
  • Doctor Call Time

    Throughout the week our doctors host 30-minute conference calls for potential patients in order to answer general questions about the clinic, explain the approaches of nutritional medicine (also referred to as holistic, alternative, integrative, etc), their backgrounds, and areas of expertise.

    Please note that we cannot give specific medical advice through Doctor Call Times.

    These calls are intended to help you learn more about the clinic and how we can address your health goals. However, until you have been seen in an appointment and established as a patient, doctors and staff are not allowed to give medical advice of any kind. For example, they will not be able to tell you what vitamin to take or in what doses. They can, however, give an explanation of what our general approach is in treating a certain condition or concern. To find out more about becoming a patient please click HERE.

    For call-in information and the full weekly Doctor Call Time schedule, please click here:   DOCTOR CALL TIMES

  • Research Studies, Journal Articles, and other Resources

    The Riordan Clinic does not necessarily promote or endorse the information within the following links. We are sharing them as a resource for further consideration based on medical research and scientific data.

    Listed in order by date, the most recent is posted first.

    • June 2020 Edition

      "Intravenous vitamin C for reduction of cytokines storm in acute respiratory distress syndrome"

    • April 29, 2020

      "High-Dose IV Vitamin C on ARDS by COVID-19: A Possible Low-Cost Ally With a Wide Margin of Safety"

      Physician's Weekly
    • April 25, 2020

      "Hospital-Based Intravenous Vitamin C Treatment for Coronavirus and Related Illnesses"

      Townsend Letter
    • April 23, 2020

      "Vitamin C Evidence for Treating Complications of COVID-19 and other Viral Infections"

      Orthomolecuar Medicine News Service
    • April 14, 2020

      "Early Infusion of Vitamin C for Treatment of Novel COVID-19 Acute Lung Injury (EVICT-CORONA-ALI)"
    • April 9, 2020

      "Vitamin D Supplements Could Reduce Risk of Influenza and COVID-19 Infection and Death"

      Orthomolecular Medicine News Service
    • April 9, 2020

      "85 COVID Patients at The Center for Holistic Medicine: Zero Hospitalizations and No Deaths"

      Dr. Brown's Blog Post
    • April 7, 2020

      "The Functional Medicine Approach to COVID-19: Virus-Specific Nutraceutical and Botanical Agents"

      Institute for Functional Medicine
    • April 5, 2020

      "Early Intervention Protocol for COVID-19 Can Save Lives"

    • April 3, 2020

      "EVMS Critical Care COVID-19 Protocol" and "COVID-19 Protocol Summary" developed by Dr. Paul Marik

      Eastern Virginia Medical School
    • April 1, 2020

      "The American Association of Naturopathic Physicians Urges Physicians and Hospitals to Utilize IV Vitamin C to Combat the COVID-19 Pandemic"

      PR Web
    • March 24, 2020

      "COVID-19, ARDS & Cell-Free Hemoglobin – The ASCORBIC ACID Connection"

    • March 24, 2020

      "IV Vitamin C for hospital use for COVID-19"

    • March 20, 2020

      "Facts About Using Vitamin C to Fight COVID-19"

      Newsmax Health
    • February 11, 2020

      Clinical Trial: "Vitamin C Infusion for the Treatment of Severe 2019-nCoV Infected Pneumonia"

    • February 7, 2020

      "Vitamin C may reduce the duration of mechanical ventilation in critically ill patients: a meta-regression analysis"

      Journal of Intensive Care
    • January 18, 2020

      "Vitamin C in sepsis-induced acute respiratory distress syndrome (ARDS)"

    • November 2017 (Not new information but definitely worth revisiting)

      "Vitamin C and Immune Function"

      US National Library of Medicine • National Institutes of Health
  • Media - links to external articles

    The Riordan Clinic does not necessarily promote or endorse the information within the following links. We are sharing them as a resource for further consideration based on medical research and scientific data.

    In order by date, the most recent is posted first.

    • April 23, 2020

      "Oregon State University researcher: Vitamins C, D can help prevent COVID-19"

      Statesman Journal
    • April 20, 2020

      "Could vitamin C help cure COVID-19? A Canadian trial hopes to find out"

      National Post
    • April 19, 2020

      "A Review of Helpful Antiviral Strategies" (Andrew W. Saul's Update on Coronavirus, COVID-19)

    • April 17, 2020

      "Dr. SHIVA LIVE: Media FORCED to Report High DOSE Vitamin C Saves ER Doctor."

      Dr. Shiva (via Facebook)
    • April 17, 2020

      "Can vitamin C fight coronavirus? Central VA begins treatment study on hospitalized veterans with COVID-19"

      Richmond, VA (ABC 8 News)
    • April 16, 2020

      "Local hospital using experimental drug treatment in hopes of saving lives of COVID-19 patients"

      Houston, TX (Click2Houston)
    • April 16, 2020

      "Video conference with Dr. ZY Peng, of the world's first high-dose IVC trial"

      Cheng Integrative Health Blog
    • April 15, 2020

      "Vitamin C effective against COVID-19: Expert"

      Anadolu Agency (Turkey)
    • April 15, 2020

      "A Richmond doctor’s dramatic story of COVID-19 infection, hospitalization and survival"

      Richmond Time-Dispatch
    • April 14, 2020

      "Duane, Is That Right? Vitamin C won't protect you from COVID-19, but may help treat it"

      Cincinnati, OH (WKRC)
    • April 13, 2020

      "Emergency room doctor, near death with coronavirus, saved with experimental treatment"

      LA Times
    • April 12, 2020

      "AHMADZAI states Vitamin C should be used for COVID-19 treatment and prevention at home and in hospital"

      Globe Newswire
    • April 9, 2020

      "Megavitamin Man (Andrew Saul, PhD) Interview with Dr. Eric Nepute"

      Neptune Wellness (via Facebook)
    • April 9, 2020

      "Las Vegas couple says supplements, herbs helped them battle coronavirus"

      Las Vegas, NV (KSNV)
    • April 8, 2020

      "COVID-19 and Vitamin C with Dr. Paul Anderson"

      Mahan Health (via YouTube)
    • April 7, 2020

      "Vitamins C and D Finally Adopted as Coronavirus Treatment"

    • April 7, 2020

      "Early Intervention Protocol for COVID-19 Can Save Lives"

      YouTube: "Recovery without walls"
    • April 6, 2020

      "Three U.S. Hospitals Use IVs of Vitamin C & Other Low-Cost, Readily Available Drugs To Cut The Death-Rate Of COVID-19 — Without Ventilators!"
    • April 2, 2020

      "FAMOUS Vitamin Infusion Clinic - Dr. Eric Nepute Interviews Dr. Ron Hunninghake MD"

      Nepute Wellness (via Facebook)
    • March 27, 2020

      "IV Vitamin C being used to fight COVID-19"

      Cincinnati, OH (WKRC)
    • March 27, 2020

      "New York Hospitals Administer Intravenous Vitamin C To Seriously Ill Patients Amid Pandemic"

      Medical Daily
    • March 27, 2020

      "Local doctors offer advice on ways you can strengthen your immune system"

      Tulsa, OK (KTUL)
    • March 26, 2020

      "Intravenous Ascorbic Acid (IVAA) for COVID-19 Supportive Treatment in Hospitalized COVID-19 Patients"
    • March 26, 2020

      "Natural remedy could help the coronavirus: New Orleans doctor explains"

      New Orleans, LA (WDSU-6)
    • March 26, 2020

      "Vitamin C and other ways to possibly boost your immune system"

      New Orleans, LA (4WWL)
    • March 26, 2020

      "Does Vitamin C shut down the coronavirus?"

    • March 25, 2020

      "Reports: Hospitals in NY Treating Coronavirus Patients with Vitamin C"

      Whole Foods Magazine
    • March 25, 2020

      "IV of Vitamin C could be a game-changer against coronavirus, Scottsdale doctor says"

      Scottsdale, AZ (3TV News)
    • March 25, 2020

      "COVID-19: Vaccines to be tested in healthcare workers; Could survivors be the answer for a new treatment?"

      MD Linx
    • March 24, 2020

      "New York hospitals treating coronavirus patients with vitamin C"

      NY Post
    • March 23, 2020

      "Arroyo Grande doctor’s integrative perspective on the coronavirus, part 2"

      Cal Coast News
    • March 22, 2020

      "Devra Davis discusses COVID-19 pandemic"

      China Global Television Network
    • March 20, 2020

      "Treatment for severe acute respiratory distress syndrome from COVID-19"

      The Lancet: Respiratory Medicine
    • March 18, 2020

      "Successful High-Dose Vitamin C Treatment of Patients with Serious and Critical COVID-19 Infection"

      Orthomolecular Medicine News Service
    • March 12, 2020

      "How to protect yourself from the coronavirus pandemic" - an interview with Dr. Ron Hunninghake

      Minnesota Spokesman-Recorder
    • March 11, 2020

      "DOH-7 to buy Vitamin C supplements for public school children"

      Philippines (CDN)
    • March 5, 2020

      "Vitamin C Saves Wuhan Family from COVID-19"

      Orthomolecular Medicine News Service
    • March 3, 2020

      "Shanghai Government Officially Recommends Vitamin C for COVID-19"

      Orthomolecular Medicine News Service
    • February 16, 2020

      "Early Large Dose Intravenous Vitamin C is the Treatment of Choice for 2019-nCov Pneumonia"

      Orthomolecular Medicine News Service
    • February 1, 2020

      "People Are Dying Needlessly of Coronavirus"

      W. Gifford-Jones, MD (website)