Effects of weight loss interventions for adults who are obese on mortality, cardiovascular disease, and cancer: systematic review and meta-analysis

This systematic review and meta-analysis, level I evidence, clearly concludes that weight reducing diets, usually low in fat and saturated fat, and exercise programmes, do not reduce cardiovascular events/cardiovascular specific mortality/cancer specific mortality.
From now on, various Company claims for cancer prevention/cardiovascular benefits of their products/diets/yoga classes/gym programmes/fitness machines/etc might be considered misleading.
In fact, intake of total fat is associated with lower risk of total mortality and lower risk of stroke.
Reference
http://thelancet.com/journals/lancet/article/PIIS0140-6736(17)32252-3/fulltext