Amgad Ghattas, N.D.
Naturopathic Doctor
Amgad began practicing family medicine in Sudan as a homeopathic physician. He then worked in rehab medicine for eight years. Amgad graduated from Trinity School of Natural Health with his Naturopathic Doctor’s degree in 2008. He has been working alongside Dr. Guyer for over 20 years. He provides natural health care to patients looking for an alternative route with supplementation and treats infectious disease with Ozone therapy, heavy metal toxicity with chelation and cancer with IPT (Insulin Potentiation Therapy). Amgad is a member of International College of Integrational Medicine and Ozone Master. His hope is to one day bring more awareness to the benefits ozone therapy has on infectious disease and to impact as many lives as possible.
When Amgad isn’t treating patients, he spends his time volunteering with his wife and enjoys reading a good history book!
Kelly Mandery, CMA
Certified Medical Assistant & Executive Director
Kelly began her career as a Medical Assistant in 2013 when she graduated from Kaplan College. She worked at St. Vincent Hospital as a Medical Assistant for 2 years. After working in traditional medicine, she became frustrated with treating symptoms rather than finding the root cause. Therefore, she felt the need to pursue preventative care which led her to integrative medicine. Kelly joined the functional medicine field in 2016 which led her to The Guyer Institute. Dr. Guyer quickly noticed Kelly’s potential which pushed her to go back to school. She is currently enrolled at Trinity School of Natural Health to pursue her Naturopathic Doctorates Degree. Following her dreams of healing others, Kelly plans to begin seeing her own clients in the near future!
In her free time, Kelly loves spending time in the gym with her husband, grounding with nature, and creating memories with friends and family.
Mary Trebly, PharmD
Supplement Store Manager
Mary graduated from Purdue University in 2003 with her PharmD degree. She worked at CVS as a pharmacist for 16 years! She began working for The Guyer Institute as Pharmacist and Supplement Store Manager in January of 2020. In her free time, she enjoys spending time with her husband, Joe, and children, Julie, Will, and Sam, hanging out with her friends, and reading a good book!
