Lean System 7 was recently evaluated in an eight-week randomized, double-blind, placebo-controlled clinical trial the 39gold standard39 of studies. Those using Lean System 7 faired exceptionally well compared to those in the placebo group who followed the same exercise and nutrition plan. Some subjects using Lean System 7 showed an increase in basal metabolic rate BMRthe body39s fat-burning mechanism up to 43%, which equates to burning an extra 930 calories per day.