John Kelly, MD, MPH, LM Specialist

Co-author, ACLM Lifestyle Medicine Board Review Course
Lead Faculty, Reversing Type 2 Diabetes and Insulin Resistance with LM

“Dr. John,” as he is affectionately called by patients and staff, is passionate about lifestyle medicine. Dr. Kelly completed his undergraduate education in Biochemistry and Molecular Biology, graduating Summa Cum Laude as a McMurran Scholar. He then completed the Dual Degree Program at Loma Linda University, receiving his MD in 2000 and his MPH in Epidemiology in 2002 with honors. He completed residency training in Preventive Medicine in 2003 and received ABPM Board certification in 2004.

Dr. Kelly received the AMA Excellence in Medicine Award in 2004 as a Young Physician for his work in establishing the American College of Lifestyle Medicine, the medical specialty society for clinicians who specialize in the use of therapeutic lifestyle interventions in the treatment and management of disease ( He served as founding President for ACLM. Dr. Kelly accepted an appointment as Assistant Research Professor in the Nutrition Department at Loma Linda University with the Lifestyle Research Initiative, where he conducted a multicenter outcomes analysis of lifestyle centers in the U.S. and served as Co-PI for a multimillion-dollar diabetes research project in the Marshall Islands.

Dr. Kelly continues to work with ongoing studies investigating the use of therapeutic lifestyle interventions in the treatment and management of type 2 diabetes, metabolic syndrome and related chronic diseases. He is presently Director of Medical Education & Research at the Black Hills Lifestyle Medicine Center ( He was Medical Director for outpatient lifestyle programs. Dr. Kelly enjoys sharing the scientific evidence for the use of lifestyle to treat, prevent and reverse disease with his patients and with other practitioners, researchers and the public. He gives invited expert presentations on lifestyle medicine, epigenetics and other topics internationally. He also serves as a lifestyle medicine expert consultant.

Wes Youngberg, DrPH, MPH, CNS, FACLM

Assistant Clinical Professor, Loma Linda University Schools of Public Health & Medicine
Founder and Director, Youngberg Lifestyle Medicine Clinic

Wes Youngberg is a practicing lifestyle medicine specialist and clinical nutritionist in Southern California. He was trained at Loma Linda University where he received a Master’s degree in Nutrition and a Doctorate of Public Health in Preventive Care. He has authored the books Goodbye Diabetes and Hello Healthy and is a speaker for the online diabetes reversal program and educational video series titled Diabetes Undone.

Dr. Youngberg is an assistant clinical professor for the Schools of Medicine and Public Health at Loma Linda University, Fellow and founding director of the American College of Lifestyle Medicine. He sees patients in-office or online at the Youngberg Lifestyle Medicine Clinic near San Diego, CA. More recently, Dr. Youngberg has specialized in treating type 3 diabetes and insulin resistance of the brain found in Alzheimer’s patients.

In 2018, the American Journal of Lifestyle Medicine published Dr. Youngberg’s paper, Clinical Lifestyle Medicine Strategies for Preventing and Reversing Memory Loss in Alzheimer’s. Also in 2018, he co-authored with Dr. Bredesen, in the Journal of Alzheimer’s Disease & Parkinsonism, a paper documenting reversal of cognitive decline in 100 patients. Dr. Youngberg’s most recent book, Memory Makeover: How to Prevent Alzheimer’s And Reverse Cognitive Decline, highlights how testing for and reversing glucose intolerance and insulin resistance is often the most important clinical step in addressing cognitive decline.

George E. Guthrie MD, MPH, CDE, FAAFP, FACLM, DipABLM

Assistant Director, Advent Health Family Medicine Residency 

George Guthrie received his MD from Loma Linda University in 1981. After completing his Family Medicine Residency, he joined a multispecialty medical group on the island of Guam in Micronesia. The high incidence of type 2 diabetes in his patients triggered his interest in the effective treatment of the disease through lifestyle changes.

Dr. Guthrie returned to Loma Linda University in 1992 and earned a master’s degree in Public Health with a focus on nutrition. He then joined the faculty at the LLU’s School of Medicine and the LLU School of Public Health’s Nutrition Department, where he taught graduate and medical students how lifestyle impacts the cause and treatment of disease. In 1994, he moved to a rural practice in northern California.

While serving as medical director at Lifestyle Center of America in Sulphur, Oklahoma from 2002 to 2007, Dr. Guthrie enjoyed helping people who really wanted to make lifestyle changes to treat their lifestyle-related diseases  such as type 2 diabetes, hypertension, obesity and coronary heart disease.

In 2007, he joined Florida Hospital’s Family Practice residency, where he guides medical residents in family and lifestyle medicine and pilots innovative ways of incorporating lifestyle medicine into office and hospital practice.

Dr. Guthrie has helped to develop or pilot several community-focused lifestyle-change programs, including the Complete Health Improvement Project (CHIP), the Wellspring Diabetes Program and the CREATION Health program. This work has allowed him to share lifestyle medicine presentations with audiences in the U.S. and other countries. His most recent accomplishments have been the writing chapters and editing a section for Rippe’s 3rd edition of Lifestyle Medicine textbook, publishing his experience in peer reviewed literature, and the recent release of a book for the popular press entitled Eat Plants, Feel Whole.

Cyrus Khambatta, PhD, Nutritional Biochemistry

Co-founder, Mastering Diabetes

Cyrus Khambatta is co-founder of Mastering Diabetes and is an internationally recognized nutrition and fitness coach who has been living with type 1 diabetes since 2002. Using an evidence-based approach to nutrition and fitness, he first reduced his own insulin usage by more than 40%, and has educated thousands of people with all forms of diabetes how to reverse insulin resistance using food as medicine.

Cyrus earned a Bachelor of Science in Mechanical Engineering from Stanford University in 2003, then earned a PhD in Nutritional Biochemistry from the University of California at Berkeley in 2012.

He is the co-host of the annual Mastering Diabetes Online Summit, a featured speaker at the Plant-Based Nutrition and Healthcare Conference (PBNHC), the American College of Lifestyle Medicine (ACLM) Conference, Plant Stock, and has been featured on Forks Over Knives, NPR, PBS, KQED, Fast Company, and is the author of the book Mastering Diabetes.

Dean Sherzai, MD, MAS, MPH, PhD(c)  |  Ayesha Sherzai, MD, MAS

Co-directors, Alzheimer's Prevention Program
Loma Linda University

Dean Sherzai trained in neurology at Georgetown University School of Medicine and completed fellowships in neurodegenerative diseases and dementia at the National Institutes of Health and UC San Diego. He also holds a PhD in healthcare leadership with a focus on empowering communities achieve their optimal brain health, and two masters degrees; one in Public Health on the subject of lifestyle and epidemiology and a second in advanced research methodology. He is currently the co-director of the Alzheimer's Prevention program at Loma Linda University and president of the international non-profit, Healthy Minds initiative, which hopes to empower communities to take control of their own brain health.  

Ayesha Sherzai leads the Lifestyle Program for the Prevention of Neurological Diseases. She completed a dual training in preventative medicine and neurology at Loma Linda University, a masters in clinical research at UCSD, and a fellowship in vascular neurology and epidemiology at Columbia University. She is also a trained plant-based culinary artist. Ayesha is currently the co-director of the Alzheimer's Prevention program at Loma Linda University, and lead researcher at the Healthy Minds Initiative. 

Scott Stoll, MD, FABPMR

Co-founder, The Plantrician Project

Scott Stoll is the co-founder of The Plantrician Project, The International Plant Based Nutrition Healthcare Conference, The International Journal of Disease Reversal and Prevention, and the Regenerative Health Institute; a unique collaborative project with The Rodale Institute that integrates a regenerative vision for human health, agriculture, and the environment. 

Dr. Stoll is a member of the Google FoodLab, serves on the advisory board at Whole Foods for their healthcare clinics and served as a member of the Whole Foods Scientific and Medical Advisory Board.  Dr. Stoll is the Chairman of the Board for The Plantrician Project.  

Every year Dr. Stoll hosts the very popular one week health immersion, Dr. Stoll’s Total Health Immersion in Naples Florida and helps attendees restore and optimize their health, suspend and reverse common lifestyle diseases, and develop a sustainable regenerative lifestyle.  In addition to authoring several books including Your Next Bite, Alive!, and numerous scientific articles. 

Dr. Stoll has appeared on national shows including the Dr. Oz show, hosted a 2018 PBS special Food As Medicine, and numerous documentaries including Eating You Alive, Wait till its Free, and The Game Changers. As well as being a published author and member of the 1994 Olympic Bobsled Team, he is a highly sought-after international speaker. Dr. Stoll and his family live in Bethlehem, Pennsylvania.   

Brenda Davis, RD

Brenda Davis is a leader in her field and an internationally acclaimed speaker. As a prolific nutrition and health writer, she has co-authored 11 books with over 800,000 copies in print in 13 languages. Her most recent works include Kick Diabetes: Essential Diet and Lifestyle Guide (2019), The Kick Diabetes Cookbook (2018), Becoming Vegan: Comprehensive Edition (2014) and Becoming Vegan: Express Edition (2013). Becoming Vegan: Comprehensive and Express Editions have received a star rating by the American Library Association as the “go-to books” on plant-based nutrition, won two Book of the Year Awards in the US, and a Canada Book Award.

Brenda is also co-author of several peer reviewed journal articles. She is the lead clinical nutrition specialist for the diabetes intervention project in the Marshall Islands, and recently completed a lifestyle intervention demonstration program in Lithuania. Brenda is a past chair of the Vegetarian Nutrition Dietetic Practice Group of the Academy of Nutrition and Dietetics.

Neal Barnard, MD, FACC

Adjunct Associate Professor of Medicine
George Washington University School of Medicine
President, Physicians Committee for Responsible Medicine

Neal Barnard is an Adjunct Professor of Medicine at the George Washington University School of Medicine in Washington, DC, and President of the Physicians Committee for Responsible Medicine.

Dr. Barnard has led numerous research studies investigating the effects of diet on diabetes, body weight, and chronic pain, including a groundbreaking study of dietary interventions in type 2 diabetes, funded by the National Institutes of Health, that paved the way for viewing type 2 diabetes as a potentially reversible condition for many patients. Dr. Barnard has authored more than 90 scientific publications and 20 books for medical and lay readers, and is the editor in chief of the Nutrition Guide for Clinicians, a textbook made available to all U.S. medical students.

As president of the Physicians Committee, Dr. Barnard leads programs advocating for preventive medicine, good nutrition, and higher ethical standards in research. His research contributed to the acceptance of plant-based diets in the Dietary Guidelines for Americans. In 2015, he was named a Fellow of the American College of Cardiology. In 2016, he founded the Barnard Medical Center in Washington, DC, as a model for making nutrition a routine part of all medical care.

Working with the Medical Society of the District of Columbia and the American Medical Association, Dr. Barnard has authored key resolutions, now part of AMA policy, calling for a new focus on prevention and nutrition in federal policies and in medical practice. In 2018, he received the Medical Society of the District of Columbia’s Distinguished Service Award. He has hosted four PBS television programs on nutrition and health.

Originally from Fargo, North Dakota, Dr. Barnard received his M.D. degree at the George Washington University School of Medicine and completed his residency at the same institution. He practiced at St. Vincent’s Hospital in New York before returning to Washington to found the Physicians Committee.

Jeni Shull, MD, MPH, DipABLM

Jeni Shull is a board certified Family and Preventive Medicine physician. Dr. Shull graduated from Indiana University School of Medicine as a Primary Care Scholarship recipient. She pursued her interest in whole person care and nutrition at Loma Linda University’s Family and Preventive Medicine residency, where she served as chief resident for both programs.

During residency, Dr. Shull completed her masters in Population Medicine, organized a farm share for the residency clinic, and received the Resident Teacher of the Year Award and the Will Alexander Whole Person Care Award. She then attended the first Lifestyle Medicine Fellowship at the Black Hills Health and Education Center under Dr. John Kelly, founder of the American College of Lifestyle Medicine (ACLM). She worked with Dr. Kelly and ACLM to co-author and revise the Foundations of Lifestyle Medicine Board Review Course. Currently, she is the medical director of Well Life by Schneck in Seymour, Indiana, a Lifestyle Medicine focused employer-based clinic; and she is the co-chair of the ACLM Education Committee. Dr. Shull enjoys speaking about, writing on, and living out lifestyle medicine principles that can prevent or reverse disease.

Outside of medicine, Dr. Shull enjoys hiking, singing on her church worship team, traveling, trying new recipes, and spending time with her family.

Denise C. Fields, PharmD, BC-ADM, FASHP, DipACLM

Denise Fields became a Diplomate of the American College of Lifestyle Medicine and the International Board of Lifestyle Medicine in 2018. She currently works as a Lifestyle Pharmacist at the Cummins LiveWell Center in Columbus, IN. Dr. Fields received her B.S. in Pharmacy from Butler University and her PharmD from Purdue University. She holds conventional medicine certifications in Immunization Delivery, Diabetes Care, Anticoagulation, Medication Therapy Management and Pharmacogenomics. She is also board certified in Advanced Diabetes Management.

Dr. Fields began her Lifestyle Medicine Journey as a CHIP facilitator, and now participates in the training of new CHIP facilitators at the Cummins LiveWell Center. She has also completed Dr. McDougall’s Starch Solution Certification Course for Professionals.

Dr. Fields has experience in various pharmacy practice sites including community (independent and chain), hospital (critical access to teaching sized hospitals) and managed care. She has fulfilled such roles as clinical pharmacist, informatics pharmacist, medication safety pharmacist and Director of Pharmacy.

Dr. Fields currently serves as co-chair for the Pharmacist Member Interest Group within the American College of Lifestyle Medicine and as the President of the Indiana Pharmacists Association. Prior to these roles, she served as President of the Indiana Society of Health System Pharmacists in 2015 and President of the Indiana Academy of Non-Traditional Pharmacists in 2017. Dr. Fields has served on the Board of Directors for both the Indiana Pharmacists Association and the Indiana Rural Health Association. She has served on Section Advisory Groups for the American Society of Health-System Pharmacists for the past 7 years. She served as Chair of the Indiana Pharmacy Practice Advancement Initiative Task Force from 2014-2015.

Dr. Fields is also a Certified Zumba Instructor. She teaches classes in her rural hometown of Versailles, IN and also for the employees of Cummins in Columbus, IN. She discovered a new love of hiking after a trip to Havasu Falls in 2018 to celebrate her 50th birthday.

Brain Health Month