First of all - seriously? The "sensi-shake"? Who came up with that name? I just got a great idea for a combination weight-loss tool: The Sensi-Shake-Weight. It's like a shake weight, but filled with a milkshake that you can suck through a straw every time the shake weight gets near your face. And you thought the shake weight couldn't get any more phallic.
Anyway, the trick was that both shakes were actually exactly the same, just packaged differently. The researchers predicted that participants would experience greater reduction in ghrelin levels after drinking the "sensi-shake," since they went into it feeling good about their healthful choice.
But as it turned out, the participants' ghrelin levels were flat or just slightly higher while tasting the "sensi-shake" - pretty boring. In contrast, their ghrelin levels sharply increased right before tasting the "indulgent," terrible-for-you shake, then plummeted after drinking it - this means they craved it like crazy before tasting it and were totally satisfied afterward.
The takeaway is bad news for dieters: if you think of your eating experience as "restricted" or "sensible," you're not going to be as excited about it, nor are you going to feel satisfied when you're done eating. The trick is to convince yourself the food you're about to consume is a delicious treat, rather than sulking about how you're forcing yourself to eat a tasteless cardboard substitute for real food.
The same goes for being a successful vegan. I love being a vegan because I get excited about food I can eat, rather than bemoaning everything I can't. It's fun to have a bit of restriction so I can build fun recipes around vegan ingredients and try restaurants I'd probably never have checked out otherwise.
Of course, I'd have totally ruined this study by refusing to drink either milkshake. But for all the non-vegans out there: steer clear of anything that calls itself a "sensi-shake." It's not - they're tricking you.
See this post on ThisDishIsVeg.com.