In this 7-day , randomized , single-blind , placebo-controlled , pilot study , 15 metabolic syndrome ( MetS ) patients ( 11/4 F/M ; age 46.9 9.14 years ; body mass index [ BMI ] 28.2 1.8 kg/m2 ) were in the L-carnitine group ( LC ) and 15 ( 10/5 F/M ; age 46.8 10.9 years ; BMI 27.1 2.3 kg/m2 ) were in the control group ( CT ) .