I don't know what this is?

sorry its not clear but you can find it on goggle

Overview: the 5DPT Plan
Thank you for joining me in the 5 Day Pouch Test program and making it a valued tool in your weight loss surgery toolbox. Countless thousands of people worldwide have successfully used the 5 Day Pouch Test since 2007 to take control of their weight loss surgery tool. Many have lost regained weight and others are reaching a healthy weight after long stalls in weight loss. But more importantly, feelings of failure are replaced with feelings of empowerment, capability, and personal achievement.

This is the 5 day plan that I have developed and used to determine if my pouch is working and return to that tight newbie feeling. And a bonus to this plan, it helps one get back to the basics of the weight loss surgery diet and it triggers weight loss. Also, it is not difficult to follow and if you are in a stage of carb-cycling it will break this pattern. Sounds pretty good, right?

The 5 Day Pouch Test should never leave you feeling hungry. You can eat as much of the prescribed menu as you want during the day to satiate hungry and prevent snacking on slider foods and/or white carbs. You must drink a minimum of 64 ounces of water each day. A reduction of caffeinated beverages is suggested, but do not stop caffeine cold turkey.

Weight loss is not the intent of the 5 Day Pouch Test, however, many who have tried this plan report a significant drop in weight. More importantly they celebrate a renewed sense of control over their pouch and eating habits and easily transition back to a healthy post-surgical weight loss way of eating.

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5DPT: Daily Food Plan:
On the 5 Day Pouch Test you will follow a dietary progression beginning with liquid protein and ending with firm protein. This mimics the early dietary progression following surgery. Please click the "Read More" links to see each day in full detail. Hint: There is more to this plan than meets the eye with the seemingly simple dietary progression, please read the plan fully to guarantee your best success with this back-to-basics effort.

Days 1 & 2: Liquid Protein
low-carb protein shakes, broth, clear or cream soups, sugar-free gelatin and pudding. Read more.

Day 3: Soft Protein
canned fish (tuna or salmon) eggs, fresh soft fish (tilapia, sole, orange roughy. Read more.

Day 4: Firm Protein
ground meat (turkey, beef, chicken, lamb), shellfish, scallops, lobster, fresh salmon or halibut. Read more.

Day 5: Solid Protein
white meat poultry, beef steak, pork, lamb, wild game
Read more.

Good luck! I believe you are going to like the results when you give this plan an honest try. YOU CAN DO THIS! ~~ Kaye Bailey

http://www.5daypouchtest.com/

Is there any data or scientific publishings that suggest that this is a real thing ?

It sounds like a gimmicky nonsense to sell books or get people to view a website.

What is the metabolic rationale for eating 5 different types of protein in 5 days ?

Post operatively the progression is so you can get adequate protein intake while on an extremely calorie restricted diet to fend of muscle catabolism, progressing from soft/easy to eat protein sources to tougher to eat/digest ones.

Somehow suggesting that this will magically work to fix or tighten your pouch doesnt make sense to me.

Although I could understand it being beneficial in the sense that it encourages patients to eat lean healthy protein sources, which is always a good thing, and something you should be doing everyday regardless.

It is a fad diet and does not "reset your pouch."