You already know the answer.  Sorry, but there are no shortcuts.  You want to know how to reduce the weight of your body?  It's all about your body.  It's about what you put into your body, and what you do with your body.  It's that simple.  Forget supplements, forget books or courses.

It's like a broken record, but it's the truth:  Watch what you eat, and take care of yoru body.  Exercise.  Don't eat crap.  Don't smoke, don't drink alcohol to an excess.  Take care of your body.  Eat properly.

Every book, every course will just find different different way to state the above.  Supplements are just band-aids that address the symptoms of NOT eating properly and NOT exercising.

Eat properly.  Exercise daily.  Change your habits.