My mum always used to buy this extra oxygenated water. I had no idea she was a fish and absorbed oxygen by swallowing it. ><
Also, pretty much 100% of weight loss diets marketed to overweight people, because, even if some of them might show short term weight loss, none of them are sustainable eating patters, and the vast majority of people who lost weight on those diets return to their old eating habits soon after, and usually gain back all the weight they lost. None of these fads are giving people the secret to a healthy life; they're selling you shit, knowing you'll fail with it, only to come back and try the next fad diet.