President Donald Trump defended his energy and health in an interview with The Wall Street Journal. He also disclosed that he had a CT scan, not an MRI scan, during an October examination about which he and the White House delayed offering details. Trump, in the interview, said he regretted undergoing the advanced imaging on his heart and abdomen during an October visit to Walter Reed National Military Medical Center because it raised public questions about his health. His physician said in a memo the White House released in December that he had "advanced imaging" as a preventative screening for men his age.

Celebrities and influencers are helping promote high-tech medical scans that companies claim can help catch deadly diseases, including cancer. Some experts warn the experimental approach may lead to extra worries and unnecessary treatment. The scans are being pitched to people who are willing to pay a premium to learn more about their health. The scans aren't cheap. Companies like Prenuvo charge more than $2,000 for a full-body MRI scan. Medical societies don't recommend routine MRI scans in healthy individuals and insurers don't cover them.