Dr. John Lieurance is a chiropractic neurologist and naturopathic physician in Sarasota, Florida, and the originator of Functional Cranial Release (FCR). He has practised for 28 years, holds a Doctor of Chiropractic (DC) and a Doctor of Naturopathy (ND), and is board eligible with the American Board of Chiropractic Neurology (DABCN). He is the author of five books, including Melatonin: Miracle Molecule and Methylene Blue: Magic Bullet, and is the founder of Advanced Rejuvenation and of the supplement company MitoZen.
Dr. Lieurance holds a Doctor of Chiropractic (DC) degree and a Doctor of Naturopathy (ND) degree. Florida does not license naturopathic physicians, and he does not hold a Florida naturopathic licence — he practises under his Florida chiropractic licence. He is board eligible with the American Board of Chiropractic Neurology (DABCN), is a Registered Medical Assistant, and performs musculoskeletal ultrasound. He has more than 25 years of experience in regenerative medicine.
Functional Cranial Release (FCR) is an endonasal cranial therapy developed by Dr. Lieurance in which small balloons are briefly inflated inside the nasal passages to mobilise the sphenoid and surrounding cranial bones. The aim is to improve nasal airway function, cerebrospinal fluid dynamics, and neurological function. Dr. Lieurance has trained 107 doctors worldwide in the technique and wrote It’s All In Your Head! and AirWays on the subject. Blocked airways lead to poor breathing and oxygen delivery, which contributes to many neurological conditions.
Read the full guide to Functional Cranial Release →
Dr. Lieurance treats tinnitus, sensorineural hearing loss, and vertigo with a regenerative protocol combining laser therapy (photobiomodulation) and stem cell therapy, rather than with hearing aids or masking alone. He wrote SunaVae on this approach. Results vary between patients, and inner ear regeneration is not a cure for all forms of hearing loss.
Read the full guide to inner ear regeneration →
Dr. Lieurance works with patients on functional neurology, hyperbaric oxygen therapy (HBOT), laser therapy, mold illness (CIRS and biotoxin illness), Lyme disease, tinnitus, vertigo, and hearing loss, alongside Functional Cranial Release and inner ear regeneration.
Dr. Lieurance appeared in the documentary Pain Revealed, contributes to ABC 7 News and SNN News, and has been a guest on podcasts including Ben Greenfield Life, The Luke Storey Show, and CellTV with Dr. Dan Pompa.
Dr. Lieurance sees patients at Advanced Rejuvenation, 1014 North East Avenue, Sarasota, FL 34237. Call (941) 330-8553 to book a consultation. Patients travel to Sarasota from across the United States and internationally for Functional Cranial Release and inner ear treatment.
Also at Advanced Rejuvenation: Dr. Alex Smithers (ultrasound-guided regenerative injection, prolotherapy, prolozone, prostate health) and Dr. Kelly Schwemmer (hormone replacement therapy, sexual, vaginal and facial rejuvenation).