Meet the Staff


Dr. Nickels has practiced as a Board Certified Nutritional Physician and Chiropractic Physician in the Jacksonville area for over 32 Years. He has just opened a new practice for Science Based Wellness in Ponte Vedra Beach where he does his Nutrition and Wellness Program that benefits people from all ages from as young as infancy to patients well past their 80’s. He does what people now call “CONCIERGE CARE”. This means your healthcare is managed and maintained with a one-time payment without office call fees and you have access to Dr. Nickels at your service with any questions and answers throughout this Wellness Program.

Lisa Petges Photo

Lisa Petges is our office manager and patient care coordinator. She moved to Jacksonville seven years ago from Wisconsin where she owned and operated salons and spas. Lisa started a hospitality service "Celebrate First Coast Homes" and networked for a local spa in Ponte Vedra. She enjoys helping people look beautiful on the outside and inside now with nutrition!  Lisa brings a wealth of knowledge and experience to Science Based Wellness for excellent client care!


Cristal Reister is our Social Media/Marketing Manager and also one of our Patient Care Coordinators.  Cristal is a native of Ponte Vedra Beach and owner of Cristal Clear Social Media.  She has worked with many local business owners to help grow their businesses by having a voice on multiple social media networks, creating email marketing campaigns, designing business marketing materials and more.  Cristal first came to us as a patient and quickly became interested in learning more as she was becoming healthier.  She strives to help all of our patients reach optimal health using natural health solutions.


Please welcome Elizabeth Sisselman, RD, LDN to our practice!!! Elizabeth is a registered dietitian licensed in Florida and Georgia. She earned her Bachelor's of Science in Nutrition at Georgia State University and completed her dietetic internship at Mayo Clinic here in Jacksonville. She loves helping people make sense out of nutrition! If you need help with your new diet or would like to make some healthy lifestyle changes with eating but not quite sure where to start, then call our office at 904-834-2337 and ask for Elizabeth!

Contact Us


Office Hours

by appointment only

Mon - Fri:

9:00 am - 7:00 pm


8:00 am - 1:00 pm