Internal Medicine and Holistic Medicine Combined
A Message from our Founder
Welcome! I’m Dr. Karen Sun, founder of the Integrative Wellness Center in Orange County, California, and board-certified in both Internal Medicine and Integrative & Holistic Medicine. After facing my own struggles with menopause, gut issues, and the limitations of conventional care, I discovered powerful, evidence-based solutions—like bioidentical hormone pellet therapy, personalized nutrition, detox, and regenerative treatments—that transformed my health and now transform the lives of my patients. Some of these really effective evidence-based solutions I found over the years was captured in my first book : Vitality Now - A comprehensive guide to anti-aging, rejuvenation and vibrant health.
From fatigue and mood swings to gut imbalance and stress, I treat the root causes, not just the symptoms. Whether you're searching for answers after years of frustration or simply want to slow the aging process and feel your best, I’m here to help. Let’s create a personalized plan so you can thrive—stronger, healthier, and more vibrant than ever.
Dr. Sun's Degrees and Certifications
Fellowship: UC Irvine, Long Beach VA Hospital
Residency: Mt. Sinai Hospital, Chicago, IL
Medical School: National Taiwan University
Nurse Practitioner - Annie Tak, FNP-C / MSN
Nurse Practitioner Annie joined the Integrative Wellness Center in 2019 and quickly became a key partner to Dr. Karen Sun in delivering exceptional care. She holds a Master of Science in Nursing/Family Nurse Practitioner from the University of Phoenix, a Master of Arts in Psychology from Pepperdine University, and a Bachelor of Science in Nursing from UCLA. With a strong background in Internal Medicine and aesthetics, Annie specializes in bio-identical hormone therapy and leads our Aesthetic Program, offering BOTOX, and JUVEDERM to help patients look and feel their best.
Outside the clinic, Annie is a certified group fitness trainer who enjoys Pilates, kickboxing, and running marathons—living the vibrant, balanced lifestyle she inspires in others.
Annie's degrees and certifications
Master of Science in Nursing/Family Nurse Practitioner: University of Phoenix
Master of Arts in Psychology: Pepperdine University
Bachelor of Science in Nursing: UCLA
Get to the root cause.
We use techniques to treat the root cause of a patient's condition without the use of pharmaceuticals. We design programs to detoxify and build, using nutrition and nutraceuticals customized to each individual's needs. We combine this with a strong focus on mind/body support to prevent or reverse physiological changes in the body.