What is REALLY efficient when it comes to weight loss - sustainable weight loss - is to lower your calorie intake and/or up your calorie burn. That's really all you need to do.
Personally, I'd never spend a dime on any weight loss promoting product. There are no short cuts, just do what you know is right.
"Losing weight is never about eating as little as possible"
"You wouldn't worry so much about what others think of you if you realized how seldom they do.
― Eleanor Roosevelt
"Do. Or do not. There is no trying."
- Master Yoda.
From October 4th 2010 to April 3rd 2012 I lost half my body weight - 80 kilos/170 lbs. Since then, I have had two cosmetic surgeries to remove excess skin. I have now quadrupled my strength, gained several kilos in muscle mass, and today I focus on building muscle, optimizing my diet, and living healthy. I am stronger, healthier, thinner, happier!