Who Do You Trust When Everyone Has Evidence

We live in a time of extraordinary access to medical and scientific information. Research that once remained largely within universities, hospitals and professional circles can now reach anyone in seconds. Healthcare professionals share their knowledge online. Companies publish clinical evidence. Patients exchange experiences. Search engines and AI can collect information from hundreds of sources almost instantly. Yet more information hasn't necessarily made deciding what to trust easier. Ask a seemingly simple health question and you can quickly find yourself with several different answers. Your doctor recommends one approach. A physiotherapist suggests another. You find a scientific paper supporting a third. A healthcare company presents clinical evidence for its solution. Then an influencer confidently explains why everything you've just read is wrong, complete with a link to another study.

And the uncomfortable part is that some of them may have a point.

For anyone communicating about health, medicine or science, this is the environment your message enters. Your audience isn't waiting for you with a blank page. They arrive with information, assumptions, previous experiences and competing advice from sources that may all appear credible.

So how do you communicate in a way that deserves their trust?

The Problem Isn't Simply Misinformation

It would be convenient if contradictory health information could be divided neatly into reliable science on one side and misinformation on the other. Reality is much messier.

I've experienced a relatively ordinary version of this myself. When I was diagnosed with a lumbar disc hernia, my doctor treated the inflammation, prescribed pain relief and told me to avoid lifting heavy weights in the future. My physiotherapist gave me a set of stretches that I should continue as a permanent part of my routine. Then I started reading. Among the countless exercises and recommendations online, more specialised sources introduced an apparently contradictory idea: strengthening could be beneficial, and rather than simply avoiding lifting, learning how to lift and move properly could be an important part of managing the problem.

Even the advice that was consistent wasn't necessarily complete enough to use confidently. I knew which stretches I had been given, but not necessarily what I should feel while doing them, what I shouldn't feel, or which warning signs meant I could be making things worse. None of this meant that my doctor or physiotherapist was necessarily wrong, or that something I found online was necessarily right. The problem was that I had pieces of information without enough context to understand how they fitted together. And that's a much harder problem than misinformation.

The same thing happens at a larger scale in health and science. Different professionals may approach the same condition from different perspectives. Different studies ask different questions, examine different populations and measure different outcomes. A recommendation that makes sense in one context may sound contradictory when it is placed next to advice addressing another part of the problem. Then there are less comfortable factors. Commercial interests exist. Research can be sponsored. Experts can have professional or financial conflicts of interest. Companies naturally have products they want to sell. Healthcare professionals can become committed to particular approaches. Social media rewards confidence, novelty and attention far more reliably than it rewards nuance. And sometimes information is simply wrong.

So when two credible-looking sources disagree, there are many possible reasons. The science may genuinely be uncertain. They may be answering different questions. One may have stronger evidence than the other. Their professional perspectives may differ. Financial or personal interests may influence how evidence is selected or presented. Or one of them may simply be making a poor claim. From the audience's perspective, these can look remarkably similar.

When Everyone Starts Shouting “Science”

Faced with this environment, healthcare communicators understandably try to establish authority. Backed by science. Clinically proven. Recommended by experts. Supported by research. Then come the percentages, references, credentials and clinical claims. None of these are inherently problematic. Quite the opposite. Evidence should be central to health communication. Clinical validation matters. Expertise matters.

The problem begins when evidence becomes primarily a badge of authority rather than a tool for understanding. Because your organisation isn't the only one using it. One company has a study. Another has three. One has an expert. Another has 9 out of 10. One presents an impressive statistic. Another presents an even more impressive one. Eventually healthcare communication starts to resemble a room full of people competing to see who can shout “science” the loudest. And the person we're supposedly trying to help is still standing in the middle of the room.

That's where the approach needs to change.

Evidence is still essential, but instead of standing at the end of the road shouting that our direction is the right one, we can use it to explain the problem, what is known about it, where uncertainty remains, which relevant approaches exist and where our own solution fits among them.

A medical device, treatment or healthcare service becomes more meaningful when people understand not only what it does, but why the problem exists, what can influence it and what other ways of addressing it may be relevant. That doesn't mean turning every communication into a complete medical education programme. It means giving people enough context to understand the position we are asking them to consider.

Here is the problem. These are the relevant options. This is where our approach fits.

Make Complexity Understandable

Doing that well requires translation. Scientific and medical expertise comes with terminology, concepts and assumptions that may be natural to specialists but difficult for everyone else to navigate. The answer isn't to remove the science or flatten a complicated subject into something falsely simple, but to decide which complexity matters and find the clearest way to communicate it. Sometimes words are enough; sometimes illustration, animation, diagrams or information design can make an invisible process, mechanism or piece of data understandable in a way that another paragraph cannot. The same responsibility applies to uncertainty. Studies have limitations, findings apply within particular circumstances and not every question has a definitive answer. Good communication doesn't need to present every caveat, but it shouldn't sound more certain than the evidence allows. Knowing where certainty ends is part of expertise.

Show Where You Stand

Once that context is clear, there is no need to pretend the communicator has no position. A healthcare company can advocate for its technology, a pharmaceutical company can make a case for its treatment, and a provider can recommend its approach. Transparency doesn't mean neutrality. It means making the reasoning visible: this is the problem as we understand it, these are the relevant options, this is what the evidence allows us to say, this is where our approach fits, and this is why we recommend it. At that point, communication stops being another attempt to outshout competing claims and starts giving the audience something more useful: a way to make sense of them.