Debate Announcement


An Open, Public, Online Debate on Radiation Hormesis

Sponsored by*

Scientists for Accurate Radiation Information (SARI): &

XLNT Foundation:


It is clear that the public and professionals have widespread concerns about the cancer risk from the exposure to low levels of radiation based on the linear no-threshold (LNT) model for radiation-induced cancer, which has been endorsed repeatedly by national and international advisory bodies over the past six decades. Based on the LNT model, large efforts are underway to reduce the radiation dose to the public and the radiation workers to reduce their presumed cancer risk.

Though the LNT model has been used for the past six decades, doubts have been raised about the validity of the evidence quoted for the LNT model and the model itself, because data from several studies have shown that when people have been exposed to low levels of radiation, their cancer risk has been observed to decrease, consistent with a phenomenon known as radiation hormesis. If these data are valid, then the efforts to reduce the radiation dose based on the LNT model would not be reducing the cancer risk but would be increasing the cancer risk. Hence, it is important that the evidence for radiation hormesis be evaluated to determine its validity.

To facilitate a review of the evidence for radiation hormesis, we have compiled and presented some of the evidence in the website We have also provided a facility at the website for any readers to refute the evidence. If the cited evidence for radiation hormesis are found to be flawed and so invalid, we would have to reject the evidence. However, if the cited evidence for radiation hormesis is not refuted, we would be justified in concluding that radiation hormesis is valid. In that case, the LNT model, since its conclusion is opposite to that of radiation hormesis for low radiation doses, would need to be declared to be invalid, and major changes would need to be made in our current radiation safety regulations and practices to make them consistent with radiation hormesis, in order to protect the public from harm.

We request all the advocates of the LNT model to examine the presented evidence for radiation hormesis and refute them if they can. The evidence has been presented briefly in the website with links provided to the original articles that contain the evidence. The readers are referred to the original articles for details regarding the evidence.

The debate begins today (March 13, 2020) and will end on May 15, 2020. The results of the debate will be announced shortly thereafter.

We wish to thank you for participating in this important debate on radiation hormesis. Your feedback on the debate is welcomed at:

*Additional sponsors are welcome. If the organization you represent is interested in becoming a sponsor of the debate, please email to with a request. There is no cost to become a sponsor of the debate.