The GI issues tend to be minor. Unpleasant, but not exactly any more debilitating than a lactose intolerant person deciding that they really really wanted that extra large milkshake. Some people have it worse - but those, to my understanding, very much are in the minority.

Tirzepatide also has significantly fewer GI issues.

Muscle mass loss happens in any sort of weight loss where you don't eat enough protein and get enough exercise. There's no current evidence that when you control for calorie deficit, diet macros, level of exercise, bmr, etc., that people lose more muscle mass on GLP1 agonists to my knowledge.

Is there any evidence those things aren't just side effects of eating less food?

GI issues are almost always minor. Folks are used to zero discomfort in their lives so the social media reporting of such is wildly overdone.

Tirzepatide is being investigated as a therapy for IBS. Within two weeks of being on the drug I was able to start living a life not scheduled around being near a restroom. This was suggested as a potential side effect by my doctor before taking it for weight loss, due to the GIP component in the drug which slows down your digestive track.

It could be I’m eating less. However I have went on crash diets before with absolutely no change to my constant lifetime GI issues, and have eaten extremely clean the past half decade due to a partner who cooks amazing healthy meals that would exceed most definitions of the term.

I’ve long since reached my goal weight and target body composition- but I plan on sticking to a low dose of Tirzepatide for the rest of my life since it gave me my life back. No more popping Imodium every few hours on vacation while simultaneously fasting. Just a normal life these days. I can enjoy a breakfast if I feel like it without it ruining the rest of my morning. Heck, I can even eat shitty greasy food at the state fair with only mild discomfort most folks would have from such poor choices.

Every study (still limited in number) I’ve read more or less refutes all the social media hysteria. There is a whole lot of smoke but no fires yet to be seen. They may still be coming.

The things that are not wholesale misinformation seem to be the requirement to cease use many weeks before going into surgery, potentially needing to be on it for your whole life, and the side effect it currently has on your finances. Nothing else seems to hold up under scientific scrutiny yet.

Perhaps I will regret this decision in 20 years, but I’m willing to take that risk to have some of the best quality of life years I’ve had yet.