Nope. I've used it for over a year with no issue. Do you have any issues with dairy? Genepro Musclegen is whey isolate protein powder derived from milk. There is nothing else in it. However, unlike most everyone else who was constipated post surgery, I had diarrhea/soft stool for several weeks. So not everyone gets constipated (be glad!).

There is nothing questionable about the Genepro product. Lots of people are bashing but not doing their own research. I vetted it out last year. The makers do not claim a serving has 30 actual grams of protein but rather they claim that the way they micronize their protein molecules, they absorb at the equivalent of 30g. It's all in the technology of how they process the protein (they say their molecules are much smaller than traditional protein powder). It could all be BS but what I do know is 1) their unflavored whey protein taste is barely detectable so I can actually tolerate it 2) one serving is only a Tbsp vs 1/4 cup like most other protein powders and 3) it actually dissolves and doesn't deteriorate in hot beverages and foods (I am sure the smaller serving size helps here as well). If protein tastes terrible and makes icky lumps in my drink I'm not going to drink it no matter how many grams of protein it has!

The old saying "You can't fit 10lbs of *kitten* in a 5lb bag" seems appropriate. The wording is dubious at best. 15 grams of protein is 15 grams. It doesn't magically become 30 grams.

If they claimed that other brands of protein were unable to be absorbed properly, making only 15 grams of 30 actually absorbable, I would be more keen to not call BS. But the deceptive wording would have you believe that 15 grams of Genepro protein magically becomes 30. That's just not the case.

This of course has no bearing on the taste quality of the product.

One thing to note is that this soon after surgery, anything or nothing special at all could be causing your gastrointestinal distress. You are going to be adding and eliminating foods all the time. You will find some things you ate before surgery without issue have now become no-way foods and then one day they are ok again.

Are you using artificial sweeteners? Some artificial sweeteners can cause gastrointestinal distress. Personally I can't drink anything with saccharin or aspartame. The only one I can use is Stevia. Just something to think about it!

Agreed, I don't want to argue about Genepro either. I just suggest any naysayers do their homework first before bashing it is all. Everyone needs to figure out what works for them. I'm 15 months out so I no longer use it on a regular basis but it was the only protein powder I liked/tolerated. Looking at the ingredients list nothing seems like it would cause distress unless you may have developed a sensitivity to one of them since surgery which is totally possible!
Protein Blend (Instantized Peptide Whey, Hydrolyzed Whey & Genetic Hexapeptide Protein), Enzyme Complex (Amylase, Protease, Cellulase, Beta-D-Galactosidase), BCAA Blend (Leucine, Valine, Isoleucine), Hexapeptide Multi-Strand Amino Complex (Proprietary Blend), L-Glutamine

Either way - we all use what works best for us. If it doesn't work for you, don't use it. If you are able to get all your protein in using "real" food... fantastic! If anything you use makes you sick or having bad effect - don't use it. Everyone has to do what is best for them.