The UK National Institute of Clinical Excellence (NICE) has recently endorsed MBCT as an effective treatment for prevention of relapse. Research has shown that people who have been clinically depressed 3 or more times (sometimes for twenty years or more) find that taking the program and learning these skills helps to reduce considerably their chances that depression will return. The evidence from two randomized clinical trials of MBCT indicates that it reduces rates of relapse by 50% among patients who suffer from recurrent depression.

Teasdale et al. 2000