How To Read Supplement Research Without A Science Degree

Why This Is Worth Twenty Minutes Of Your Life

Supplement marketing runs on the phrase "studies show", which is doing an enormous amount of work and almost never gets examined. Six questions are enough to evaluate most claims you will encounter.

1. Was It In People?

The first and most consequential question. A great deal of supplement science comes from cells in a dish or from rodents, and neither reliably predicts what happens in a person.

Where a claim rests on laboratory work, the honest wording is "a plausible mechanism". Where it rests on human trials, "studies in people found". Those are different sentences, and the gap between them is where most exaggeration lives.

2. How Many People, And For How Long?

Twelve participants across two weeks is a pilot. Two hundred across twelve weeks starts to mean something. Neither is worthless, but they support very different claims.

Short trials are particularly weak on anything to do with weight, which moves slowly enough that eight weeks barely registers.

3. Compared Against What?

Without a placebo group you cannot separate the supplement from expectation, seasonality, or the fact that people who join a trial usually improve their behaviour on entry.

The phrase to look for is randomised, placebo-controlled. Its absence is not disqualifying, but it downgrades everything that follows.

4. Was The Dose Realistic?

A trial using 500 mg tells you very little about a product containing 50 mg. This is the single most common gap between a cited study and the bottle citing it.

Checking it takes thirty seconds and eliminates a lot of products, which is why we set out the amounts on every ingredient page.

5. Who Paid For It?

Industry funding does not invalidate a study, and pretending otherwise is its own form of laziness. It does justify wanting independent replication before treating a single result as settled.

One trial is not a literature. Garcinia Cambogia is the clearest example on this site: a body of work that genuinely disagrees with itself, which is why we describe the effect as small and inconsistent rather than proven.

6. How Big Was The Effect?

Statistically significant means unlikely to be chance. It does not mean large. A great many supplement findings are real and tiny at the same time.

Green tea catechins are the standard illustration: detectable differences in energy expenditure, measured in fractions of a kilogram across twelve weeks. Genuine, and nothing like the headline.

The Shortcut

Ask whether a claim describes a mechanism or an outcome, in people, at a realistic dose, against a placebo, replicated more than once. Very few supplement claims survive all five — including some made about the product this site covers, which is exactly why they are written up honestly on the science page.

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