Marnie Nickels
(MSN, APRN, FNP-C)
Marnie is a compassionate Nurse Practitioner with over 20 years of experience in healthcare. A native Floridian, she proudly serves the South Florida community where she has built both her career and her family. Marnie is passionate about helping patients achieve wellness and vitality through personalized, comprehensive care in anti-aging, wellness, medical weight loss, hormone optimization, and peptide therapy. Outside of her practice, she is a proud mother of three and the wife of a dedicated firefighter, drawing inspiration from her family and community every day.
Steve Lizano
(DNP, FNP-C, APRN)
Steve is a doctorate-trained, board-certified Family Nurse Practitioner with over five years of advanced clinical experience providing comprehensive, patient-centered care to individuals from all backgrounds.
He specializes in hormone optimization, testosterone replacement therapy (TRT), peptide therapy, erectile dysfunction treatment, and medically supervised weight loss. Steve believes that everyone deserves to feel strong, energized, confident, and in control of their health — regardless of age, gender, or lifestyle.
Through secure, convenient telehealth visits, he develops personalized treatment plans that are evidence-based, results-driven, and tailored to each patient’s unique goals and physiology. His goal is simple: help you perform at your highest level.
Eric Diffendefer
(Nutrition and training)
Coach Eric brings over 18 years of experience in bodybuilding, nutrition, and applied biochemistry, along with a culinary degree from Le Cordon Bleu. He specializes in developing precise nutrition and training strategies that enhance body composition, performance, and overall health through a science-driven, results-focused approach.
With a strong emphasis on hormone optimization, Eric designs customized protocols that align nutrition, training, and recovery with TRT and supplementation plans. His methods are built to maximize efficiency and sustainability—helping clients improve metabolic function, build lean muscle, and achieve measurable, long-term results.
Kyle Piazza
(Physician Assistant)
Kyle graduated summa cum laude from Florida Atlantic University in 2019 with Bachelor of Science in Neuroscience and Behavior. He then attended physician assistant school at Keiser University in Fort Lauderdale where he earned a Master of Science in Physician Assistant studies. He has worked in several fields including psychiatry, orthopedic surgery, and emergency medicine, and is certified in Botox and Filler. He also holds a membership to the American Association of Physician Assistants.
Kyle has a passion for helping people. A fitness enthusiast himself, he aims to help people achieve their longterm goals, fitness and other. He also wants to raise awareness of health issues that men face.
Kyle competes in Brazilian Jiujitsu and received his black belt in 2024. He is a member of the International Brazilian Jiujitsu Federation.
Yuri Karukin
(Clinic Director)
Stacy Karukina
(Patient Coordinator)