Mehmet Oz, the celebrity doctor named to oversee Medicare in the Trump administration, posted online endorsements of herbal products that threaten to run afoul of US marketing rules, according to a health watchdog.

Watchdog group Public Citizen asked the Federal Trade Commission to take action against Dr. Mehmet Oz for allegedly violating influencer marketing standards.

Consumer watchdog group Public Citizen accuses Oz of failing to properly disclose his financial ties to an herbal supplement company he markets on social media.

President-elect Donald Trump’s pick to lead the Centers for Medicare and Medicaid Services – is facing a public call for a federal investigation. Consumer watchdog group Public Citizen on Tuesday urged the Federal Trade Commission to “immediately” investigate the well-known television doctor’s financial ties to a supplement company