Health Advice Is Finding a New Messenger
For many young adults, the health guidance that sticks with them longest is not coming from a physician, a parent or a close friend. It is arriving through a social media feed, often from someone they have never met. That is the central finding of a new study published in the journal Health Communication, led by researchers including Emily Pfender, an assistant professor in the department of communications at the University of Delaware.
The research examines the memorable health messages that young adults absorb on social platforms — the bits of advice that linger in their minds, sometimes for years. According to the study, those messages are now attributed far more often to influencers and online strangers than to the trusted personal networks that previous research identified as the primary source of lifelong health guidance.
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What the Study Set Out to Examine
Pfender describes the project as an investigation into the health messages young adults remember receiving through social media. The goal was not simply to catalogue what advice circulates online, but to understand which pieces of it leave a durable impression — and where those pieces originate.
The answers point to a significant shift in how health information travels. Rather than recalling guidance passed down by doctors, family members or friends, participants in the study tended to recall content delivered by influencers and unfamiliar users. In many cases, the person behind the message was not someone the participant followed at all. The advice appeared once, in passing, and still stayed with them.
A Departure From the Theory of Memorable Messages
The findings challenge a long-standing framework in communication research. The Theory of Memorable Messages has traditionally held that the messages we carry across a lifetime come from people we know and trust — figures embedded in our personal networks who have an established role in our lives.
This study disrupts that assumption. Its results suggest that young people's most enduring health messages are now delivered by strangers and influencers on social media. The researchers note that most participants did not even follow the influencer responsible for the advice, meaning the exposure was brief and incidental rather than part of an ongoing relationship. Despite that fleeting contact, some participants reported remembering the message for more than six years — a duration that underlines how deeply such content can embed itself.
That durability matters. Memorable messages, by their nature, can persist for a lifetime, shaping attitudes and behaviors long after the original post has scrolled out of view.
Both Problematic and Empowering
The study's findings are not uniformly negative or positive. According to Pfender, the memorable health messages participants recalled fell into two broad categories: some were problematic, while others were genuinely empowering.
Questionable Prescriptions
Among the problematic messages were sweeping, one-size-fits-all health prescriptions. Examples included:
- Using mouth tape in an attempt to alter the shape of the jaw
- Drinking two cups — 16 fluid ounces — of spearmint tea every day to address polycystic ovary syndrome (PCOS)
- Avoiding seed oils altogether
These are the kinds of simplified directives that travel well online: they are short, confident and easy to repeat. Yet they compress complex health questions into single, universal rules that may not apply to every individual.
Messages That Promoted Autonomy
Other memorable messages pushed in a more constructive direction. They encouraged young adults to take ownership of their well-being, framing health in holistic terms and treating mental health as an integral component of overall health rather than a separate concern.
That contrast is important. The same environment that spreads dubious quick fixes can also circulate perspectives that broaden how young people think about caring for themselves.
The Problem of Financial Incentives
For Pfender, the most concerning element of the findings is not simply that strangers influence health behavior. It is why some of those strangers are posting. The study notes that an influencer who becomes a young person's most memorable source of health guidance may have a financial stake in whether that audience follows the advice and buys the products being promoted.
That possibility reframes the research. A recommendation delivered by a doctor or a family member generally comes without a commercial motive attached. When the same style of advice arrives from an online creator whose income depends on engagement and product sales, the incentive structure behind the message becomes a factor in its reliability.
Pfender describes this as a fundamental change in how memorable messages are understood. The traditional model assumed trusted personal connections; the emerging reality includes actors whose interests may not align with the viewer's health.
Why These Messages Stick So Well
Several features of social media help explain the persistence of this advice. Short-form content is designed to be absorbed quickly and remembered easily. A single, unambiguous claim — avoid this ingredient, add this daily drink — is far more memorable than nuanced guidance that accounts for individual circumstances. When that claim is delivered with confidence and repeated across a feed, it can register as authoritative even without any verification.
The study's finding that a message encountered only once can be recalled more than six years later suggests that platforms are effectively functioning as informal health educators, whether or not that is their intention.
What Comes Next: Digital Health Literacy
The path forward, according to the research, runs through digital health literacy. Pfender argues that interventions teaching people to evaluate online health claims are essential, and she points to social media platforms dedicated to that purpose as one promising avenue.
Crucially, such efforts need to meet young audiences where they already are. The study suggests that training and interventions should be delivered as short-form content and posted on TikTok and Instagram — the same formats and channels that carry the original messages. Pfender speaks from experience: as a content creator herself, she shares her research findings in that space with an audience of more than 34,000 people.
That approach acknowledges a practical reality. If memorable health messages are arriving through short videos and rapid scrolling, then corrections, context and critical-thinking tools must travel the same route to have any chance of competing.
The Takeaway
The study does not argue that social media is inherently harmful, nor that all influencer health content is unreliable. Instead, it documents a measurable shift: young adults are now forming lasting health beliefs based on brief encounters with strangers online, in some cases remembering that guidance for years.
Because memorable messages can shape behavior across a lifetime, understanding where they come from — and who benefits when they spread — is no longer a niche concern. It is a central question for anyone interested in how the next generation learns to think about its own health.
This article is based on reporting by Medical Xpress. Read the original article.
Originally published on medicalxpress.com
