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Dr. Louis C.
BoveN, D.C.

AK chiropractic RESEARCH CENTER L.L.C.

Dr. Boven is a native of Holland, Michigan and attended Hope College before graduating from Life College. He has been practicing Applied Kinesiology for over 40 years. Dr. Boven began his practice at Southside Chiropractic in 1982 and founded AK Chiropractic Research Center in 1986. He became a Diplomate in the I.C.A.K. and continues today to teach this specialty to students and doctors.


Developing his expertise through research in clinical practice and staying committed to the strong foundation of Applied Kinesiology allows his patients to experience results they have been searching for. AK Research Center has become synonymous with quality healthcare. Teaching is a passion of his; and through the years Dr. Boven has mentored many doctors who share his enthusiasm of helping patients through the practice of Applied Kinesiology.

 “My purpose is to create a unique teaching center designed to help doctors with similar ideals express their talents so they may benefit and serve life and humanity. My mission is to expand and proliferate the works of

Dr. George J. Goodheart and his gift to the world, Applied Kinesiology. I will continue my commitment to leadership in clinical practice and strive always to provide the best health care for every patient I am privileged to treat."

Dr. Craig a. Kingsbury D.C.

Kingsbury chiropractic L.C.

Dr. Kingsbury is a native of Chesaning, MI and his life has been a mix a diverse experiences. At a young age he was drawn to the military and served in the Marine Core Reserves and also rode submarines in the Navy prior to attending Life University to pursue his doctorate in Chiropractic care. Upon graduating, Dr. Kingsbury began his practice at AK Research Center in 2004. Feeling called once again to serve his country, Dr. Kingsbury joined the Army National Guard in 2009, where he was deployed to Afghanistan for a year in 2012/13. During his deployment, Dr. Kingsbury saw firsthand the devastating effects of stress and trauma in peoples lives. Helping with stress/trauma recovery has become his passion. 

Dr. Kingsbury is married and has two adult children and an adorable (but spunky) seven year old grandson.



"My mission is to inspire people to become their very best self, physically, mentally and overcome pain and trauma and live life to the fullest...and through adjustments, nutrition, and choices, healing can become a reality." 

Dr. Curtis W.

Miller, D.C.

Miller chiropractic L.L.C.

Dr. Curtis Miller is a native of Rochester, Illinois, just outside of Springfield. He earned his first Bachelor’s Degree in Biology from the University of Illinois at Springfield while also playing on the soccer team. He went on to earn another Bachelor’s Degree in Life Science and graduated with his Doctorate in Chiropractic Degree from Logan College of Chiropractic in December 2009. During his time at Logan, he became very interested in Applied Kinesiology and attended over 400 hours of extra-curricular seminars learning the technique. He was AK club president for over 2 years at Logan where he helped other students learn how to properly treat patients using AK methods. Dr. Miller also attended numerous seminars on nutrition and hormone balancing. This is an area where Dr. Miller truly exceeds the knowledge of most health professionals. It also allows him to treat a wider variety of patients with various conditions. Dr. Miller and his wife started their own practice in Rochester before deciding to sell and embark on a new journey here in Holland. He is very pleased to join the elite group of doctors at AK Research Center and continue his practice using Applied Kinesiology.

Dr. Heather A. Miller,d.C.
Miller chiropractic L.l.C.

Dr. Heather Miller is a native of a small town near Muncie, Indiana. She earned her Bachelor’s Degree in Kinesiology from Indiana University. After working as a chiropractic assistant, Dr. Heather decided to pursue chiropractic instead of physical therapy. She earned her Doctorate of Chiropractic Degree from Logan College of Chiropractic in December of 2010. She and her husband, Dr. Curtis Miller, opened their own practice in Springfield, Illinois before deciding to sell the practice and join the wonderful team at AK Research Center. Dr. Heather truly has a passion for chiropractic and has pursued a certification in chiropractic pediatrics.

"As a mother myself, I love helping women and children achieve the balance between nature and health. Children are a precious gift. Each milestone they achieve should be celebrated and each day they should be given the best chance to develop to their full health potential. Through chiropractic care, this is my chance to give children the ability to have an incredible quality of life. I believe that great health starts before children are even born. Pregnancy should always be a wonderful experience and an opportunity for a mother to truly connect with her body and her baby. Integrating chiropractic care can create an easier pregnancy, labor, and delivery for mom and baby allowing for optimal fetal development. There is nothing better than having a happy, healthy baby on the day of delivery, and I look forward to helping to continue this path towards a healthy lifestyle!"


Dr. chaRles R. Hofbauer,d.C.
hofbauer Chiropractic

Dr. Hofbauer is a native of Plymouth, Michigan. He earned his Bachelor’s Degree in Exercise Science from Calvin College while playing on the hockey team. Post-graduation he opened his own personal training company in Byron Center, Hofbauer Performance, specializing in training aspiring hockey players and athletes. He also coached numerous youth hockey teams in the Grand Rapids area including Fox Motors Hockey Club and Byron Center HS.  In 2018, Dr. Hofbauer left the sports performance business to pursue his passion of Chiropractic. He earned his Doctorate of Chiropractic Degree from Logan College of Chiropractic in December of 2021. During his time at Logan he completed over 400 hours in Applied Kinesiology (AK) coursework and attended 20+ Applied Kinesiology seminars learning the technique while serving as Vice President of the AK club for 2 years. Dr. Hofbauer has a true passion for helping others reach their optimum health and well-being via the natural treatments and approach of Chiropractic care. He is very thankful and excited about the opportunity to join the largest AK office in the world alongside an outstanding group of chiropractors. Dr. Hofbauer and his wife, Sarah, reside in Jenison with their two sons: Vries and Willem.

Dr. Carter 2.jpg


carteR, D.C.

Dr. Carter is a native of Jackson, MI. She earned her Bachelor of Science at Central Michigan University in Health Sciences. Enthusiastic about helping people she decided to move to St. Louis, MO to attend Logan College of Chiropractic. In December 2014 she graduated with her Doctorate of Chiropractic and a second Bachelor’s Degree. After graduating she returned to Michigan to practice and ended up in Grand Rapids, MI practicing chiropractic. Looking to expand her knowledge to help patients, she started attending Dr. Boven’s Applied Kinesiology seminars. She is thankful to have been brought on the team at the AK Research Center where she can continue to grow and help patients.  

Dr. Kimmy N. groulx, D.C.
groulx chiropractic L.L.C.

Dr.  Groulx is a native of Lincoln Park, Michigan, just outside of Detroit. She earned her first Bachelor of Science from the University of Michigan focusing her studies on pre-med and German. She then moved to St. Louis, MO where she continued her education at Logan College of Chiropractic. There she earned another Bachelor’s Degree in Life Science and graduated with her Doctorate of Chiropractic in December 2015. While there, she completed over 300 hours of coursework in Applied Kinesiology learning the technique. Additionally, she attended extra-curricular seminars on whole food nutrition, digestive health, neuroendocrine immunology, and chiropractic pediatric care. Dr. Groulx has a true passion for helping people of all ages recognize the innate intelligence the human body has to heal from chronic disease to acute injuries through a holistic healthcare approach. She is thankful to have the opportunity to do so by joining the exceptional team of chiropractors at AK Research Center.




Dr. Pfahler is a native of Michigan and grew up in St. Joseph. He graduated from Aquinas College ini Grand Rapids and was an accountant before turning to his true passion which was chiropractic. He received his doctorate from Logan University in St. Louis, MO.

His mother is a practicing chiropractor and his grandfather was a chiropractor who graduated with Dr. Goodheart, the founder of AK. Dr. Pfahler was involved in many sports in school, especially running. He is looking forward to joining the community here in Holland and will be a great addition to the AK clinic.

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