[lesostep]

>> at half the calories, not so insignificant in a world where obesity is the #1 public health crisis

It's not so simple. The problem is that fat calories and whole milk/cream make you feel fuller, leading to decrease in eating, leading to decrease in calories

While air with sugar – especially corn syrup – doesn't make you feel full as much, leading to overeating later. High blood sugar isn't good, so your body is mostly working to turn it into stored fat as fast as possible. After it's done converting, you will feel hungry again.

Fat inside your stomach on the other side is metabolizing slowly, and it's products are mostly spend on whatever you do.

People that count their calories could make an informed choice about their calories intake and just deal with additional hunger. People that rely on hunger and individual understanding of their bodies could misjudge easily when fat is switched to gum and syrup.