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29 minutes ago, sillykitty said:

No offense Alex, but just because one Dr. has that opinion does not make it a proven fact.

There might be a study in the works on this issue

http://www.trialregister.nl/trialreg/admin/rctview.asp?TC=6637

I could not find any completed studies, so this is Dr. roller's conjecture.

The RNY bypassed just 3 feet of the small intestine, but still leaves 17. So it doesn't make sense to me that would make casein an ineffective source of Protein for bypass patients.

Please do more research. You’re very mistaken. See http://bariatrictimes.com/protein-and-the-bariatric-patient-supplemental-protein-or-amino-acids/ . Google a little and you’ll find MANY studies showing that WPI is definitely the way to go for patients that have malabsorptive procedures.

31 minutes ago, Alex Brecher said:

Please do more research. You’re very mistaken. See http://bariatrictimes.com/protein-and-the-bariatric-patient-supplemental-protein-or-amino-acids/ . Google a little and you’ll find MANY studies showing that WPI is definitely the way to go for patients that have malabsorptive procedures.

Alex ... from the article

" Whether rapid versus slow uptake of amino acids are better for protein gain among bariatric patients have not been explored."

There was absolutely nothing in that article that supports the claim that casein is inappropriate for RNY patients.

I've found a blend that has equal parts. WPI WPC & CASEIN plus amino acids and luecine.

Best of both worlds

Both whey and caesin proteins are great for weight loss. Whey generally helps build muscle mass for body builders. Caesin is good for preventing muscle loss during weight loss. Whey is digested much faster than caesin which may produced satiety sooner. Caesin digests much slower so can ward off hunger.