Sayer Ji

Sayer Ji was born on October 10, 1972, and holds a bachelor's degree in philosophy from Rutgers University, specializing in phenomenology. He has no scientific, medical, or biomedical training. He founded GreenMedInfo in 2008, initially as a website that aggregated citations from the National Library of Medicine's PubMed database with a focus on natural health topics.

GreenMedInfo grew its audience by presenting itself as a scientifically rigorous alternative to mainstream health information. The site's interface mimics a research database, giving it an air of scientific legitimacy that its content does not support. Tests conducted by McGill University's Office for Science and Society revealed that GreenMedInfo systematically shows only studies with positive results for natural ingredients, ignoring contrary evidence, and frames the results in misleading ways that exaggerate benefits and downplay limitations.

Ji became an increasingly prominent voice in anti-vaccine circles, promoting the idea that the microbiome and natural immunity make vaccination unnecessary, and that pharmaceutical interests suppress natural remedy evidence. During the COVID-19 pandemic, GreenMedInfo published numerous false and misleading claims about vaccine safety, including a viral post misrepresenting an FDA monitoring document as evidence that the agency knew vaccines would cause widespread deaths.

In 2018, Pinterest banned Ji and GreenMedInfo for promoting health misinformation. In 2020, Twitter and Instagram removed GreenMedInfo as part of COVID misinformation enforcement. The Center for Countering Digital Hate named Ji as one of the 'Disinformation Dozen' in 2021, identifying twelve individuals as the source of a disproportionate share of online anti-vaccine content. Ji denied the characterization and moved his content to Substack, where he continues to publish and maintain a subscriber community critical of mainstream medicine and vaccines.

“COVID-19 vaccines cause a wide range of life-threatening side effects including death, based on an FDA document.”

GreenMedInfo misrepresented an FDA slide listing possible outcomes to monitor — a standard surveillance practice — as proof that the FDA knew vaccines would cause these outcomes. The FDA's monitoring list explicitly does not imply these are expected or known adverse events.

“Germ theory is undermined by microbiome research and conventional vaccine policy is based on a flawed scientific paradigm.”

Microbiome research enhances rather than refutes germ theory. The existence of beneficial microorganisms does not negate the role of pathogens in causing disease. Ji uses legitimate microbiome research to draw conclusions that scientists in the field do not support.

“Natural and herbal remedies have comprehensive evidence bases that conventional medicine suppresses.”

GreenMedInfo presents a highly selective slice of biomedical literature biased toward positive results for natural products, ignoring the large body of evidence showing many such interventions are ineffective or harmful at clinical doses. McGill University's Office for Science and Society conducted tests confirming this systematic bias.