The phrase "unproven claims" refers to statements or assertions that have not been proven to be true or accurate. It means that there is not enough evidence or support to verify the claim. Full definition
This diet provides another version of a caloric restrictive diet that makes additional unproven claims for weight loss. (dietsinreview.com)
For Dr. Gregor Reid at Western University, what's frustrating about the wave of unproven claims about microbial health is they take away from legitimate research. (theglobeandmail.com)