Bullshit is cheap. Truth is expensive. That’s the starting point for Dr. Zachary Rubin, a pediatric allergist and immunologist who’s become one of the more effective voices pushing back against medical misinformation online.
Rubin isn’t just a doctor with a practice. He’s on Instagram, TikTok, and YouTube, usually wearing a small mic and his signature bowtie. His tone carries authority without being condescending — a rare balance in the misinformation fight.
Why wade into the muck at all? Because misinformation doesn’t stay online. “It walks into my exam room every day,” Rubin says. Social media lets him reach millions with the same conversations he has in clinic. His goal isn’t telling people what to think. It’s helping them think critically about health claims.
The thing he wishes more people understood: uncertainty isn’t a weakness in science. It’s one of its greatest strengths. Science is a process for getting closer to the truth, not a collection of fixed facts. Good scientists change their minds when better evidence shows up.
His favorite part of the job? Hearing someone say “I changed my mind.” That’s rare, and it reminds him that respectful conversations still work.
The hardest part? Misinformation spreads faster than nuance. A confident lie goes viral in minutes while explaining the evidence takes time. Algorithms reward outrage. But that’s exactly why more doctors and scientists need to be in the conversation, he argues.
On America’s 250th birthday, Rubin points to scientific literacy as a weak spot. We should teach people how to evaluate evidence, not just what to memorize. And scientists need to get better at explaining their work clearly. “Trust isn’t built by having all the answers,” he says. “It’s built by being honest about what we know, what we don’t know, and how we’re working to find out.”
