Snowdon had particular beef with one of the op-ed’s rules of thumb for identifying UPF: that UPF is likely to contain more than five ingredients. ‘What kind of ludicrous, arbitrary threshold is that??’ he wrote. ‘None of this has any scientific standing whatsoever!’ It is easy to see what he means. Why not six ingredients? Why not four? But arbitrariness simply doesn’t matter if you’re a scientist.
