"proven way" is a grammatically correct phrase and can be used in written English.
Example: "Following this proven way of studying has helped me achieve top grades in all my exams."
There is no consistently proven way to reduce corruption.
But this is a real way, a scientifically proven way of containing the epidemic.
There's now a proven way to do that: keep calm and pretend you're sacred.
All we are doing is extending this proven way of working.
One proven way to increase work incentives is to expand the Earned Income Tax Credit (EITC).
There is an easy-to-achieve, scientifically proven way to make yourself smarter.
And one proven way of doing that is to implement recognised global best-practice standards.
Putting on some music you enjoy and dancing around is a research proven way to feel good.
One proven way to boost enjoyment over the long haul is to give yourself regular treats and rewards.
"Nuclear energy is the only proven way to transition from coal to clean electricity generation.
