Diet plan

So, i've heard a good deal of chatter over the last month (from various sources) regarding the need to lose weight.  I've had this idea for the last several months, so, ill share it with you.

Ive been taking mental notes on coffee drinkers, since i work at a cafe that busts through a decent number of people (of course a "decent number" of people is relative).  I have noticed something very astonishing (but not counterintuitive).  The fattest people of the coffee drinking world, to no ones surprise, are the frappuccino drinkers.  The next in line are latte drinkers.  Finally, the thinnest people i serve are hands down the black coffee drinkers.  It makes sense though, after all.  If it was the reverse i would be quite perplexed.

Anyways, i formed a plan for people to get thin.  It requires, as do most effective weight loss plans, some sacrifice.  Here is the regiment: wake up, drink a 16 ounce cup of black coffee.  no sugar, no cream, just straight black.  My motives for this are as follows: black coffee has next to no calories, it speeds up your metabolism, and it suppresses your appetite.  Eat something light in the morning, or nothing at all.  your choice.  Then at lunch drink another 12 ounce cup of coffee, black and eat something that is balanced.  The idea is not to drink coffee and take in pure starch, but to pair coffee with low calorie foods.  Then, if time permits, exercise for an hour or so.  Finally, eat something filling for dinner, but low calorie again.  thats the hard version.  Im positive if someone could follow this plan, they would easily lose weight fast.

Now, since thats rather difficult, im curious to see what just the black coffee part would do independent of your other attempts.  It seems unlikely that there is not some positive correlation between BMI and black coffee.  I am rather certain that drinking black coffee in the morning and at lunch will boost metabolism and suppress appetite sufficiently to lose at least some weight.  If this turns out to be true, could we possible cure obesity in America with coffee?  that would be lolz haha