Meet the Team
Natural Heart Doctor Practitioners
Jack Wolfson D.O.
Dr. Jack Wolfson is a cardiologist, Amazon best-selling author, husband, father, and the founder of Natural Heart Doctor.
For over twenty years, more than one million people have enjoyed the warmth, compassion, and transformational power of his natural heart health methods.
Dr. Wolfson is the founder of Natural Heart Doctor, the worldwide leader in cardiovascular health. People from all over the world reach out to Dr. Wolfson for holistic heart health consultations.
He has been named one of America’s Top Functional Medicine Doctors and is a five-time winner of the Natural Choice Awards as the Top Holistic M.D. Dr. Wolfson’s work has been covered by more than 100 media outlets, including NBC, CNN, and the Washington Post. His book “The Paleo Cardiologist: The Natural Way to Heart Health” was an Amazon #1 best-seller. He is also a contibuting author to the Textbook of Integrative Cardiology.
Dr. Wolfson and his wife Heather have four children and are committed to making the world a better place to live. They provide for those in need (including animals) and support natural health causes through their philanthropic efforts.
Dr. Andrew Scott Rudin, M.D.
Dr. Andrew Scott Rudin is a highly accomplished cardiologist and cardiac electrophysiologist with a distinguished career spanning over two decades.
Dr. Rudin earned his M.D. from the prestigious Mount Sinai School of Medicine in New York, where he was honored with the Harold Elster Memorial Prize for ranking first in his class. He further honed his skills through a rigorous internal medicine residency and chief residency at Yale-New Haven Hospital, followed by specialized fellowships in cardiology and electrophysiology at Northwestern Memorial Hospital in Chicago.
Dr. Rudin is board certified in Cardiology and Cardiac Electrophysiology, with extensive certifications including Nuclear Cardiology and Echocardiography. His professional journey includes a variety of roles across multiple states, from private practice to hospital appointments where he often served as Director of Cardiac Electrophysiology.
His awards underscore his commitment to excellence and compassion in patient care, having received multiple recognitions such as the Teacher of the Year, several Compassionate Doctor awards, and distinctions as one of America’s most honored professionals. Dr. Rudin’s career is marked by a steadfast dedication to improving cardiac health and patient outcomes through expert care and innovative medical practice.
Dr. Lauren Lattanza, NMD
Dr. Lauren Lattanza is a licensed naturopathic physician specializing in cardiac and metabolic disorders. Having received in depth training from naturopathic, conventional cardiology and chiropractic physicians, she can provide you a unique perspective in your healing journey.
Her goal is to optimize your health and prevent, decrease, or eliminate the need for pharmaceuticals or invasive procedures. She will strive to understand your health concerns and treat your unique needs through in-depth conversation and comprehensive testing.
Dr. Lattanza is passionate about helping patients find and treat the cause of disease and offering interventions to optimize your health and lifespan, rather than simply treating symptoms.
She is a podcast host, mother of two wild boys, public speaker, writer, lover of the outdoors, and all-around health enthusiast.
Dr. Tonia Rainier, NMD
Tonia Rainier, NMD, is an Arizona board-certified naturopathic physician with advanced training through the Institute for Functional Medicine (IFM.org), with advanced practice modules in Hormones, Gastrointestinal, and Applying Functional Medicine in Clinical Practice (AFMCP). She has also completed Functional Endocrinology through the Morsani College of Medicine at the University of South Florida—widely regarded as one of the top medical schools in the country. At Natural Heart Doctor (NHD), she uniquely blends functional and naturopathic medicine to deliver comprehensive, root-cause care that integrates nutrition therapy, lifestyle optimization, and herbal medicine.
Her areas of focus include gut, hormonal, immune, adrenal, thyroid, and cardiovascular dysfunction. She takes a food-first approach and prioritizes lifestyle foundations—nutrition, digestion, sleep, stress resilience, and movement—to help patients achieve optimal health. Using a functional medicine lens, she interprets both conventional and advanced specialty labs to identify optimal lab ranges and personalize care to optimize each patient’s health—so you get the benefit of working with a doctor who looks deeper than just a “pill for every ill” and helps guide you through a clear, practical roadmap toward measurable improvements.
Dr. Rainier also holds a master’s degree in Exercise Science and a bachelor’s degree in Wellness Promotion, with more than 20 years of clinical and rehabilitation experience as an ACSM-certified Exercise Physiologist—finally, a doctor you really can consult about your exercise and nutrition plan. Outside the clinic, she enjoys hiking, mountain biking, and experimenting with paleo-inspired cooking. If you’re ready to invest in your health, Tonia is here to support you every step of the way.
Dr. Keith Smigiel, FNP-C, DC, FIAMA
Dr. Keith Smigiel is a regenerative medicine physician and pain management specialist. He takes an integrative approach to medicine, focusing on customized solutions tailored to individual needs. Using advanced, non-surgical treatments, Dr. Smigiel stimulates your body’s ability to naturally heal itself.
Dr. Smigiel helps people suffering from conditions such as chronic pain and erectile dysfunction, to hair loss and weight gain. Combining treatments such as PRP Therapy, Ozone, Neural Prolotherapy, and IV Infusions with functional rehabilitation, he helps you look and feel better.
He heals the body, instead of just treating the symptoms!
With his professional qualifications as a certified family nurse practitioner, a doctor of chiropractic, and a fellow of the International Academy of Medical Acupuncture, Dr. Smigiel offers patients comprehensive care from a broad perspective of conventional and alternative medicine. He also has extensive experience in functional rehabilitation and chronic pain management.
Dr. Smigiel is married to Angela and has two children, Sophia and Larz. When he’s not busy helping patients, he enjoys hiking, mountain biking, motocross, and boating.
Dr. Shannah Bayrd, NMD
Dr. Shannah Bayrd is a compassionate naturopathic physician, trauma-informed healer, and expert in the emotional and neurological roots of disease. With over a decade of experience clinically guiding patients through both emotional and physical healing, Dr. Bayrd specializes in the “Think Well” foundation of cardiovascular health. She treats the part of health that many traditional approaches overlook—the hidden emotional and neurological blocks that directly influence heart rhythm, blood pressure, and recovery.
Dr. Bayrd earned her Bachelor’s in Psychology from the University of Wilmington, NC, before receiving her Doctorate in Naturopathic Medicine from Sonoran University in Tempe, Arizona. Her unique approach blends medical insight and neuroscience with trauma healing and spiritual guidance. She is particularly skilled at helping patients uncover how deep-seated trauma, toxic beliefs, and limiting diagnoses can keep the nervous system in a state of stress, preventing the body from achieving true healing.
Known for her intuition and clarity, Dr. Bayrd is dedicated to helping patients remove self-sabotage behaviors and defense mechanisms to reconnect the heart, mind, and body. Her personal healing journey and profound faith drive her commitment to serving “hurting hearts” within the Natural Heart Doctor ecosystem. When she is not working 1:1 with patients to restore their strength and peace, she focuses on helping them build new neural pathways and habits that support lifelong wellness.
Natural Heart Doctor Health Coaches
Ashley Swanson, MS, BS
Education: B.S. in Culinary Science, M.S. in Nutritional Science.
What do you like to do in your free time?
I spend my free time with my fiancé (a chef- we love good Paleo meals), our English creme golden retriever, and my family. We all live close to one another, so we often get together for dinners filled with good food and games. I love road trip adventures, daily sunshine, reading new books, and walking with my dog.
What do you like most about working with Natural Heart Doctor?
My favorite aspect of working for NHD is working with patients and giving them hope. So many patients tell me the best gift they get when they come to NHD is hope, something not given with conventional medicine. Hope to heal naturally without pills or procedures. Once they have hope that their body can heal, they can tackle root cause issues, put the work in, and finally get well.
Angeline Karigan-Winter, CHC, MA, BA
Education: BA in Sociology, BA in Spanish, MA in Spanish, Certified Integrative Health Coach
What do you like to do in your free time?
In my free time I love to read, spend time outside hiking, camping, and canoeing. I also adore traveling and practicing my foreign language skills. I live in the country with creeks, ravines, bluffs, and caves – my son and I like to go on outdoor adventures! I’m also obsessed with yoga and love to dance.
What do you like most about working with Natural Heart Doctor?
I love working with a team in a clinical setting that truly understands holistic health and practices medicine from this perspective. Everyone here walks the walk, and lives what they recommend to people who work with us. I love talking to people all over the country and world, and offering them hope and a different (and more logical) path toward true health. Being a health coach is a very fulfilling job and a daily mirror of natural, healthy ways of living.
Miya Serrato, CHC, FND
Education: BS in Biomedical Sciences, Certified Functional Diagnostic Nutrition Practitioner.
What do you like to do in your free time?
I spend a lot of my free time with my family and our two dogs. I love getting outside, whether that’s hiking a nearby mountain, going to farmers markets, or exploring different areas in the valley. When I’m not outside, I spend my time reading, cooking, or exploring new hobbies.
What do you like most about working with Natural Heart Doctor?
I am so thankful to be surrounded by such amazing clinicians and health professionals, who hold so much knowledge around natural and holistic health practices. I love being able to meet people where they’re at and helping them grow in their ability to heal themselves and reach their goals. I am so privileged to be a part of this amazing team that helps people achieve health, no matter where in the world they are located.
Sarah Rose Glazer, B.S., Herbalist
Education: B.S. in Nutrition, Certification in Bach Flower Therapy, Certification in Ayurvedic Medicine and Clinical Herbalism.
What do you like to do in your free time?
I enjoy being outside: gardening, swimming, hiking, adventuring, and gazing at the medicinal plants all around us. You will also most likely find me in a Pilates class, sipping tea with my cats, studying as much as I can on all things holistic medicine, and making herbal remedies.
What do you like most about working with Natural Heart Doctor?
It is so inspiring to work among such intelligent clinicians who all share a common goal: to support their patients in reaching optimal health through a holistic lens. I know first hand how frustrating and isolating it can be to go through health challenges. Having the ability to assist individuals on their health journey and provide that guidance and support is such an honor.
