The only reason there are so many various items on the market that claim weight loss without a change in one's eating and exercising habits is because P. T. Barnum was spot-on.
People will believe and try anything if they can avoid working at it, or so it seems.
Amen.
Here's an analogy. I'm a golfer and pretty serious about it. Golf is a sport that takes lots of concentration about one's mechanics and lots and lots of practice time to improve aspects of one's game.
Lots of golfers however either don't have or want to put in the time it takes to improve, so they try to take shortcuts instead and thus become suckers for a vast array of goofy appliances, gizmos, magical clubs, and other crap marketed right at their weaknesses and pitched as sure cures for what ails their games. I dunno how many millions/billions people like that blow every year, but, again, Mr. Barnum got it right.