Myths, and what the evidence actually shows

Each page takes one claim, states our ruling in the first line, explains why the claim spread — because plausible-sounding claims usually have a real study behind them, overstated — and then says what the human evidence supports.

We rule on claims, not on people. Where a claim is partly right we say so rather than collapsing it into false, and where we have changed our own ruling the correction is on the page.