For how we live.
In the 1,658-person PUSH trial, a behavioural programme with financial incentives raised urine volume but left symptomatic stone recurrences unchanged over two years — 19% against 20% with usual care.
Stones form when urine gets too concentrated. The best-tested defence is dull: drink enough that urine stays dilute. In one trial, that alone roughly halved recurrences.
Low fluid intake is a genuine, well-evidenced stone risk factor. Increasing fluid to produce plenty of urine is the single best-supported way to prevent another stone — better established than any diet tweak.