Claims like "eating half a cup of beans a day is enough to lower your risk of heart disease" annoy me to no end. If it's something you need to meet a certain quota or land within a certain range for the desired effect, say that. But to say that [quantiy] does [unquantified] benefit sounds lazy. If half a cup lowers my risk, does a quarter of a cup also lower my risk?
@levisan never walking in the city lowers my risk of head trauma.
It's not a good plan though, if you live in the city.