Osteoarthritis is the most common form of arthritis, and happens when the cartilage protecting joints gets worn down. It's painful and debilitating, but new research suggests that low-dose radiation therapy (LDRT) may work as a countermeasure.

Researchers from across South Korea ran a clinical trial involving 114 people with knee osteoarthritis to compare two different doses of LDRT and a sham treatment, which had no actual radiation. Participants were not aware of which group they were in.

Those given the higher dose of LDRT, administered over six sessions, reported significantly greater improvements in pain, physical function, and their overall condition, compared to the other two groups (though there was some evidence of a placebo effect as well).

This won't restore cartilage i

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