Gen Z Trusts TikTok Doctors More Than Their Own. A New Study Says It's the Lab Coat.

One participant in a new study put the split bluntly. Her gynecologist had explained how to treat a urinary tract infection. The person who actually taught her how to get through the pain was a doctor she had never met, filmed in what looked like a home office, on TikTok.

That gap, between the doctor who diagnosed her and the doctor she trusted, is the subject of a study out of Virginia Commonwealth University's School of Business, published in the Journal of Consumer Affairs this September. Marketing professor Suzanne Makarem and co-authors Brittany Beck and Jie Fowler analyzed 330 TikTok videos from 11 licensed physicians, each with more than 100,000 followers, then interviewed 26 Gen Z users, ages 14 to 27, who actively follow doctor-influencers. Their finding: these viewers rated strangers on TikTok as more accessible, more credible, and more altruistic than their own physicians, often without checking whether the person on screen was licensed to practice anything at all.

Why a stethoscope on camera works

Makarem's term for the mechanism is the mere social media presence effect. Normally, viewers apply what researchers call persuasion knowledge, the mental flag that goes up when someone online is clearly trying to sell something. A licensed doctor filming from what looks like a clinic appears to disarm that flag almost entirely.

“What a physician-influencer recommends may carry more weight than what their own doctor tells them. That should give us pause.”

The white coat outperforms the hoodie

The study also tracked which videos drew more engagement. Physicians who wore medical attire or filmed in exam rooms and clinical-looking spaces pulled significantly more views and comments than the same doctors filming in casual clothing at home. The credibility signal turns out to be visual before it is ever verified.

Why their own doctors lost the comparison

The interviews point to a specific grievance, not a vague distrust of medicine. One participant told researchers her physician "isn't interested in preventative medicine. He wants me to keep coming to see him because that's how he makes money." Another participant's comparison was more direct: the TikTok doctors kept showing up, answering questions in the comments, acting invested, in a way a ten-minute office visit rarely allows.

Other participants raised a more basic problem: booking a real appointment, especially for mental health care, can take weeks. A doctor already on their phone, posting daily, filled that gap before any question of credentials came up.

What the study cannot tell us

The sample is small and self-selected. Twenty-six interview subjects, all of whom already followed physician-influencers going in, are not a representative slice of Gen Z, and the study cannot say how often the medical advice in those 330 videos was accurate or dangerous. What it measures is trust, not correctness, and those are not the same thing. The paper, published under a Creative Commons license through Wiley, states that limitation itself rather than claiming the trust gap proves TikTok doctors know more than the ones with offices.

The practical test for anyone scrolling past a doctor in scrubs is not whether the account feels caring. It is whether anyone has checked the license. Makarem's research suggests that step, the one persuasion knowledge is supposed to force, is exactly the one a white coat on a small screen talks people out of.