At a wellness conference held at the De Vere Cranage Estate hotel in Cheshire, Australia-based alternative health advocate Barbara O’Neill offered advice that has drawn significant criticism from medical professionals for promoting unproven and potentially harmful health practices. The five-day event, attended by hundreds and costing up to £1,300 per ticket, combined biblical references with natural remedies while rejecting conventional medical treatments such as antibiotics, vaccines, and established cancer therapies.
O’Neill, who has amassed millions of followers on social media, including 3.6 million on Instagram, has a controversial history. In 2019, Australian authorities banned her from providing health services within the country after finding that she had disseminated misleading information that placed vulnerable individuals at risk. Since then, she has expanded her reach to the UK and Ireland, where her teachings have provoked warnings from health experts about the dangers posed by her claims.
During question-and-answer sessions at the conference, O’Neill dismissed conventional medical diagnoses and encouraged attendees to avoid doctors, attributing many illnesses to misdiagnosis or overtreatment. For example, when a woman reported a stomach tumor diagnosed by two specialists, O’Neill advised against surgery, recommending instead external application of castor oil compresses—a remedy she also suggested for conditions ranging from nasal polyps to carpal tunnel syndrome. Medical professionals have repeatedly stated there is no scientific evidence supporting the efficacy of such treatments.
Other recommendations raised serious concerns among experts. O’Neill suggested using castor oil mixed with cayenne pepper in the eye to treat glaucoma and high blood pressure, a practice glaucoma specialist Prof Gus Gazzard described as unsupported and potentially harmful. She also advised a pregnant woman against taking folic acid, which is widely recognized for reducing the risk of neural tube defects in newborns.
O’Neill’s counsel to a woman with thyroid dysfunction to gradually discontinue her thyroxine medication drew condemnation from metabolic medicine professor Martin Whyte, who emphasized the serious, potentially life-threatening risks of untreated hypothyroidism. Additionally, advice to a diabetic patient to cease blood glucose monitoring was labeled "very dangerous" by psychiatry professor Gill Livingston, given the critical importance of controlling blood sugar levels to prevent severe complications.
A recurring theme at the event was skepticism toward medical testing and treatments. O’Neill characterized diagnostic tests as potentially harmful and encouraged defiance of medical advice, including oncological recommendations, without clarifying specific conditions. She portrayed conventional medical interventions as fear-driven and overprescribed, asserting that the body inherently possesses the ability to heal itself.
Concerns extend beyond direct medical advice. Some attendees expressed distrust in mainstream medicine and governmental health policies, citing personal tragedies and conspiracy theories. The conference also featured sales of amulets purported to protect against 5G electromagnetic signals, a claim refuted by experts who warn such devices are ineffective and exploit fears driven by pseudoscience.
Scientists and doctors, including Prof Liam Smeeth of the London School of Hygiene & Tropical Medicine and Dr David Robert Grimes of Trinity College Dublin, have publicly criticized O’Neill’s teachings. They warn that rejection of evidence-based treatments in favor of unproven alternatives can lead to worsening health outcomes and even death. Prior to O’Neill’s tour, medical professionals had urged event venues to reconsider hosting her appearances due to the risks of spreading misinformation.
O’Neill and her husband Michael, who manages her business and helps deliver lectures, described themselves as victims of a campaign by media and scientific communities opposing their approach. Michael O’Neill dismissed criticisms as ideologically driven attacks favoring the pharmaceutical industry and pledged to continue hosting events, citing Barbara O’Neill’s belief in a divine mandate to continue her work.
The couple’s stance and ongoing activities underscore ongoing tensions between alternative health movements and conventional medical authorities, highlighting challenges in addressing misinformation in public health discourse.