Spotting hype in health claims

Every week brings a new supplement, protocol or gadget that promises to change your life. Some of it is worth trying. Most of it is marketing. This lesson gives you a few quick checks to tell the difference.

Words that should slow you down

Certain phrases show up again and again in hype:

• “Clinically proven” with no study named.
• “Doctors recommend” with no doctor named.
• “Breakthrough”, “miracle”, “secret” or “what they don’t want you to know”.
• “Detox”, “boost”, “optimise” with no clear explanation of what changes, or how you’d measure it.

None of these prove a claim is false. They just mean the claim hasn’t shown its work yet.

Ask: what’s the evidence?

When something is described as “backed by science”, ask a few plain questions:

• Was it studied in people? Results in cells or animals are a starting point, not proof that something works in humans.
• How many people, and for how long? A small, short study is a hint, not a conclusion.
• Was there a comparison group? Without one, you can’t tell whether the thing worked or people just got better on their own.
• Who paid for it? Funding from the seller doesn’t make a study wrong, but it’s worth knowing.
• Has anyone else found the same thing? One study is a data point. Repeated results are evidence.

One study isn’t the science

Headlines love a single surprising study. But results often shrink, or disappear, when others try to repeat them. Reviews that combine many studies tell you far more than any one paper, and much more than a headline about it.

Testimonials aren’t evidence

Before-and-after photos and glowing reviews are compelling, but they have the same problems you learned about in How to tell if something is actually working: expectation, timing and changing too many things at once. They also only show the people it seemed to work for.

Follow the money

If the person making the claim also sells the product, take extra care. That includes influencers paid to promote it, and “free” content that ends with a discount code. A conflict of interest doesn’t make a claim false, but it does mean you should want better evidence.

Too good to be true usually is

Real effects tend to be modest, take time, and come with trade-offs. Claims of huge results, fast, for everyone, with no downsides, are a red flag on their own.

Your best test is your own

Even when the evidence is decent, people respond differently. If something seems worth trying, test it the way this track teaches: baseline first, one change at a time, a fair window, and compare the trend.

The checklist

• I noticed any hype words and asked what’s behind them
• I checked whether the evidence comes from studies in people
• I looked for a comparison group and a reasonable size and length
• I didn’t treat testimonials as proof
• I checked whether the person making the claim profits from it
• If I try it, I’ll test it against my own baseline

Next up: you can spot the hype and you know how to measure. The last lesson, Running a simple self-experiment, puts it all together.