This weekend on “CNN Presents,” correspondent Drew Griffin will investigate extremely controversial medical clinics that administer unproven stem cell therapies to patients. The special, CNN’s “Selling a Miracle,” will also speak to Dr. Sanjay Gupta and others who voice concerns about the treatments, which have not been peer-reviewed, while also giving viewers a more accurate look at the current state of stem cell research.

CNN could have used Gupta’s skepticism last week, when the network effectively promoted a similarly controversial stem cell therapy on “Piers Morgan Tonight” and “Starting Point.”

The guest on both shows was actress Suzanne Somers, who claims that a miraculous stem cell therapy–with no side effects (always a red flag in medicine)–effectively regrew her breasts after she underwent a lumpectomy. On “Starting Point,” Somers also advocates that cancer patients forgo chemotherapy for testosterone therapy, which has been proven to be ineffective in battling cancer:

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