"At the same time, we have seen a rise in bad actors attempting to take advantage of individuals by offering untested, deceptive treatments. Often these treatments can lead to dangerous health outcomes and we feel they have no place on our platforms," Adrienne Biddings, Policy Adviser at Google, said in a statement.
This new policy will prohibit ads selling treatments that have no established biomedical or scientific basis.
The new policy also includes treatments that are rooted in basic scientific findings and preliminary clinical experience, but currently have insufficient formal clinical testing to justify their widespread clinical use.
"Google's new policy banning advertising for speculative medicines is a much-needed and welcome step to curb the marketing of unscrupulous medical products such as unproven stem cell therapies," said Deepak Srivastava, President, International Society for Stem Cell Research.
According to Google's announcement, they will continue to allow advertising for research happening in this space for clinical trials and the ability for clinicians to promote their research findings among the the public.
As new findings come to light and regulatory bodies oversee developments in this field, Google will continue to evaluate policies and make updates as needed.