Zach Bush

Zachary M. Bush was born in 1969 in rural Virginia. He earned his MD from the University of Colorado Health Sciences Center in 2001 and went on to complete a rigorous Internal Medicine residency at the University of Virginia, rising to chief resident. He then completed a fellowship in Endocrinology and Metabolism at UVA, followed by board certification in Hospice and Palliative Medicine in 2012. By any measure, Bush's conventional medical training was legitimate and impressive — the context that makes his subsequent trajectory particularly striking.

Around 2013–2014, Bush pivoted sharply toward alternative medicine, founding Biomic Sciences (producing the gut supplement 'Restore,' later rebranded as 'ION Gut Support') and Seraphic Group. He began advocating publicly that glyphosate — the active ingredient in Roundup herbicide — was the single root cause connecting virtually all modern chronic diseases: autism, cancer, Alzheimer's, leaky gut, and the collapse of ecological systems. He adopted terrain theory, the 19th-century framework associated with Antoine Béchamp that holds disease arises from disrupted internal environment rather than specific pathogens, and which was rejected by mainstream science with the development of germ theory.

Bush's board certifications in internal medicine and endocrinology have not been renewed and are no longer active; only his Hospice and Palliative Medicine certification is currently maintained. McGill University's Office for Science and Society published a detailed critique describing his public talks as scientifically incoherent, noting a basic error in which he claimed fungi have 2 trillion genes (actual figure: approximately 10,000–25,000, comparable to humans). Medika Life and SourceWatch have documented his broader claims and financial interests.

Iron-clad conflicts of interest pervade Bush's public health advocacy: he founded and remains commercially linked to the companies producing ION Gut Support, which is marketed as protection against the very glyphosate damage he warns about in his talks. Independent clinical trials supporting the core ION marketing claims do not exist. Bush has also been prominent in COVID-19 misinformation circles, promoting terrain-theory frameworks that contradict established virology.

Bush has attracted a devoted following among wellness influencers and integrative medicine communities, appearing on major podcasts and wellness platforms. His genuine MD and impressive residency and fellowship training lend false credibility to claims that are poorly supported by the evidence base of the specialties in which he trained.

“Glyphosate is the root cause of the global epidemic of autism, cancer, Alzheimer's, leaky gut, and most modern chronic diseases.”

Glyphosate correlations with rising disease rates are ecological (population-level) and cannot establish causation. Glyphosate acts by inhibiting an enzyme (EPSPS) absent in animals and is therefore mechanistically unlikely to cause human disease through the pathways Bush claims. UC Riverside's Professor Alan McHughen has noted glyphosate's antimicrobial properties in plants do not translate to an

“Germ theory is wrong; disease arises from disrupted terrain (microbiome and environment), not pathogens.”

Bush is an adherent of Béchamp's terrain theory, a 19th-century framework that has been superseded by over 150 years of bacteriology, virology, and immunology. Germ theory does not deny the importance of host factors, but the claim that infectious disease is primarily about 'terrain' rather than specific pathogens is contradicted by the entire evidence base of modern microbiology.

“His ION Gut Support supplement (formerly 'Restore') protects the gut lining from glyphosate damage.”

The claim that ION Gut Support prevents glyphosate damage to gut tight junctions has no independent clinical trial support. Bush is the founder of Seraphic Group and Biomic Sciences, the companies producing and selling ION products, creating a direct financial conflict of interest. CFS Remission and other reviewer sites have flagged the lack of published evidence for the product's core claims.