A 2014 Cochrane review found that it was impossible to draw any conclusions about whether TM is effective in preventing cardiovascular disease, as the scientific literature on TM was limited and at "serious risk of bias".
Pregled Cochranea iz 2014. godine je utvrdio da je nemoguće izvući bilo kakve zaključke o tome da li je TM efikasan u prevenciji kardiovaskularnih bolesti, jer je naučna literatura o TM bila ograničena i "ozbiljan rizik od pristrasnosti".