Healthcare & Technology

When the Feed Becomes the Pharmacy: Why Social Media Misinformation Can Change Health Decisions

By Catalina Troy, YouthCare Connect, 10/1/2026

A person feeling sick no longer has to wait for a doctor’s appointment to look for answers. Within seconds, a search on YouTube, TikTok, Instagram, or another platform can produce hundreds of videos instantly that explain symptoms, recommend supplements, or warn against certain treatments. That access can help people learn about their health, but it also creates a serious problem: medical advice is now trying to compete for attention in the same environment in which advertisement, entertainment, and other influencer content is being shared. When inaccurate health information looks convincing enough to guide a person’s real medical decisions, misinformation stops being an online problem and becomes a healthcare problem.

From Searching the Web to Scrolling for Answers

Patients have searched for medical information online long before the modern social media we have today. From then to now, what has changed is how information reaches them. Traditional health websites usually require people to deliberately search for a question. Social media platforms, however, can place health claims directly onto someone’s feed, where a video about skin care may be followed by one about cancer screening, vaccines, or weight loss.

This matters because misinformation is not simply information with which experts disagree. Researchers generally use misinformation to describe false information that may be spread intentionally or unintentionally, while disinformation refers to false information deliberately spread to deceive others (Gram et al.). Medical misinformation can also be misleading without being completely false. A creator may accurately describe a treatment’s potential benefits while leaving out its risks, limitations, or the patients for whom it would be inappropriate.

The scale of this problem extends across many different areas of medicine. A systematic review by Victor Suarez-Lledo and Javier Alvarez-Galvez examined 69 studies of health misinformation on social media and found research documenting misinformation involving drugs, vaccines, tobacco products, pandemics, eating disorders, and medical treatments. Health misinformation is therefore not confined to one controversial subject, as it has the ability to appear almost anywhere people make decisions about their bodies.

When Popularity Looks Like Credibility

The deeper problem is that social media provides users with signals of popularity that can easily be mistaken for signals of reliability. A post can have millions of views, thousands of supportive comments, and a confident creator without providing strong scientific evidence.

The National Academy of Medicine offers a useful definition of credibility. Its expert group describes credible health sources as those likely to provide information that is high-quality while using processes that promote transparency and accountability. The authors identify three foundational principles for credible sources, these being science-based, objective, and transparent and accountable (Kington et al.). These standards reveal an important distinction. Confidence is not evidence, and popularity is not expertise. Even content that seems professional is not necessarily trustworthy. A source should be evaluated by where its claims come from, whether evidence supports them, and whether uncertainty and limitations are acknowledged.

The Cost of Believing the Wrong Post

The consequences become more serious when online information changes what someone actually does. A misleading post may persuade a person to avoid an effective treatment, postpone medical attention, purchase an unnecessary product, or seek testing that would provide little benefit.

Research increasingly shows that misinformation can cause harm in both directions. It can lead to underuse, when people delay or reject appropriate care, and it can also encourage overuse, when people pursue treatments or tests that are unnecessary. A 2025 scoping review in BMJ Evidence-Based Medicine concluded that misleading health information can contribute to uninformed decisions, delayed treatment, and potentially harmful actions such as overdiagnosis, overtreatment, and overtesting (Gram et al.).

Medical misinformation, however, is not always a dramatic post telling someone to reject medicine. Sometimes, it is a polished video promising that a particular supplement, test, or treatment is something everyone “needs.” Gram and colleagues found that only two of the 27 peer-reviewed interventions they reviewed were sensitive to medical overuse, suggesting that current responses have focused much more on misinformation that discourages healthcare than misinformation that encourages unnecessary healthcare.

Imagine a teenager watching repeated videos claiming that fatigue, headaches, or difficulty concentrating prove the presence of a particular illness. The symptoms may be real, and seeking appropriate care may be reasonable. The danger, however, begins when an algorithm repeatedly supplies the diagnosis before a qualified professional has evaluated the person. What first started as an attempt to understand a symptom can quickly become certainty built from repetition rather than real, reliable evidence.

Figure 1. Stock image of a stressed-out woman scrolling on her phone (Shultz).

Health Literacy Has to Become Digital Literacy

The answer can’t be simply telling people to stop using social media for health information, as this is neither realistic nor entirely desirable. Social media can connect patients with reliable organizations, make medical concepts easier to understand, and expose people to health information they might otherwise never discover. The challenge is learning how to distinguish between what information is useful from persuasive misinformation.

Current research suggests that education is part of the solution, but not the entire solution. The BMJ Evidence-Based Medicine review identified corrections, educational approaches, warning labels, algorithmic responses, and regulation among existing strategies. Twenty of the 27 peer-reviewed interventions focused on consumers, often attempting to improve media literacy or misinformation detection (Gram et al.). Yet, placing the entire burden on patients ignores the environment in which those patients are making decisions.

Platforms, health organizations, professionals, and users should all share responsibility. Credible medical voices should communicate evidence in ways that ordinary people can understand clearly. Platforms also need stronger systems for identifying misleading health claims and advertising. Users, meanwhile, need to pause before allowing a compelling post to become a medical decision.

Medicine Should Not Be Decided by the Feed

Social media has given people extraordinary access to medical information. It has not given every piece of that information equal value, however. The dangerous part is when the speed and confidence of a post replaces the slower process of evidence, context, and clinical judgement.

A person scrolling through health content is not merely a “user.” That person may be frightened about a symptom, deciding whether or not to take medication, wondering whether to seek treatment, or trying to help someone they love. Protecting people from health misinformation therefore requires more than correcting false facts after they have already spread. It requires building a digital culture in which credibility matters before a health claim is shared or believed.