What Are The Advantages Of Jack3d Supplements If Taken Before Swimming Session?

I am 33 y/o, 5 10 and 70kgs. I have been putting on weight around my middle lately and have therefore started swimming workouts 3 weeks ago. These sessions consist of 30mins laps 6 days/week. In order to increase the intensity of my workouts, and to assist in muscle growth and fat burn, would a pre-workout supplement like Jack3D help before each swimming session? I am worried that such supplements will have adverse reactions and actually result in weight increase instead of muscle growth. Please help.