The phrase "proven formula" means a method or strategy that has been tested and shown to be effective or successful.
Sentences with «proven formula»
The brand claims that it comes with a unique and proven formula for weight loss. (wisejug.com)
It's a scientifically proven formula designed to get you better dates with people you really connect with. (eharmony.ca)
It has a pretty traditional battle system, but with enough twists in the already proven formula to make it a more exciting experience for veteran gamers. (snackbar-games.com)