Meet the Team

James Joseph, DO, AAAM

Dr. Joseph is a highly talented and progressive Board Certified Family Medicine Physician with extensive experience in Advanced Aesthetic Medicine and Healing Medicine. A Strong background working in hospital and clinical settings. He is adept in communicating with patients, attending physicians, specialists, and nursing staff. Dr. James’ passion is implementing healing medicine as a first line approach to health in an effort to minimize surgeries, and medication dependance later on.


  • American Osteopathic Association, American Academy of Anti-Aging Medicine
  • Advanced Aesthetic Medicine 2012
  • Liposculpture with Fat Transfer 2012
  • Healing Medicine Fellowship 2016
  • Peptide Training 2017
  • Vampire Facelift, Hair, Breast Lift, P and O Shot Certification 2019
Dr. James Joseph
vitality healthcare

Lauren V. Oliver-Schmitt, FNP

Lauren is a certified Family Nurse Practitioner who joined Vitality Healthcare in December of 2022.

She completed her Master of Science in Nursing in 2020 while working as a Neuro Critical Care nurse at Bronson Hospital. She is an active member of The American Association of Nurse Practitioners.

Lauren has a Bachelor of Science in Nursing from Mercy College of Ohio where she was a member of Sigma Theta Tau International Honor Society of Nursing. She has an additional Bachelor of Science from The University of Michigan, Ann Arbor in Brain, Behavior, and Cognitive Science.

Being raised in the Portage and Kalamazoo area, Lauren has always had a passion to serve the community by providing individualized care for her patients. She believes in focusing on the root cause of health issues and a functional medical approach of healing.

In her free time, Lauren has traveled the world from Alaska to Europe, China, Japan, and Hong Kong. She hopes to continue to add adventures to the list in the future. She also enjoys spending quality time with her family, watching movies, learning to play golf, and creating custom cakes and cupcakes for all occasions.

Steven Osterhout, DC, CCN

Portage native, Dr. Steven Osterhout, attended Western Michigan University where he attained his Pre-Med degree in Biological Medicine, then his Doctorate in Chiropractic. Dr. Osterhout is a member of the American Academy of Anti-Aging Medicine, American Academy of Environmental Medicine, and the Institute for Functional Medicine. He also pursued post-doctoral studies in Clinical Nutrition and is a Board Certified Clinical Nutritionist.

At the age of 12, Dr. Osterhout was diagnosed with Type 1 Diabetes and at 20 he underwent open heart surgery. Experiencing these two profound health challenges so early in life created an overwhelming need to find answers as to why we become–and remain–sick. This fueled a passion for identifying how poor health develops and what can be done to overcome health issues using a functional approach.

dr steven osterhout
nathaniel weiss

Nathaniel Weiss, DC

Dr. Nathaniel Weiss is a 2017 Palmer Chiropractic College graduate. He attended Northern Michigan University where he obtained a bachelor of science degree. Not only does Dr. Nate excel in chiropractic care but he is also trained in physical therapy and sports rehab. He is passionate about patient care and making a difference in the lives of others.

Sarah Brady, LMSW, CLE

Sarah Brady LMSW, CLE is Vitality Healthcare’s Clinic Director & Certified Lifestyle Educator. Sarah is a fully licensed therapist with a Master of Social Work degree. Her post graduate training includes continuing clinical nutrition education, holistic health, anti-inflammatory diet counseling and integrative mind-body coaching. She has 13 years of experience guiding patient’s with managing multiple food allergies and rotation diets, modifying menu plans, providing lasting weight loss strategies, reversing metabolic disease through diet and lifestyle recommendations, and empowering clients to overcome the psychosocial challenges they face with chronic illness and obesity. Sarah is a powerful advocate for healthy living because of her own health success achieved as a result of implementing the exceptional strategies offered at Vitality Healthcare. She’s passionate about healthy cooking, yoga, paddle boarding, biking and traveling. Sarah finds great joy and purpose in helping others transform their physical and mental health using food as medicine.

sara brady
trina madonia

Trina Madonia, CTA

Trina, CTA is Vitality Healthcare’s Functional Medicine Consultant and a Weight Loss Specialist in our medical weight loss program. She has 27 years of experience in the chiropractic/functional medicine field. She has been practicing Applied Kinesiology for 15 years. The majority of her time in our clinic is spent hands on with patients, testing and educating about functional medicine and the underlying cause of disease processes. She is passionate about our patients care and focuses on education for their greatest outcome. Her specialties include, nutritional testing, genetic optimization, a/sert technique, percussor therapy, cold laser therapy and kinesio taping. She loves to attend continuing education seminars to learn new techniques to add to our protocols for our patients greatest health benefits.