8 Reasons Not to Have Bariatric Surgery, Honestly Explained

I had a gastric sleeve a few years ago, and I’m glad I did it. But if you’re weighing the decision right now, I don’t think anyone did me a favor by only telling me the good parts ahead of time. This is the honest list of reasons some people decide not to have bariatric surgery, or decide to wait, whether they’re weighing gastric sleeve vs. gastric bypass or another option entirely. It’s not here to talk you out of anything. It’s here so you’re deciding with the full picture.

Is Bariatric Surgery Actually Risky?

Yes, though less than people often assume. NIDDK lists bleeding, infection, and leaks at the stapled or sewn sections of the stomach or intestine as immediate surgical risks, along with blood clots that can travel to the lungs or heart. ASMBS puts the overall risk of death at about 0.1% and the chance of a major complication at about 4%, and it states these rates are comparable to other common operations like gallbladder surgery, appendectomy, or knee replacement.

That’s not nothing. It’s abdominal surgery, and NIDDK notes that follow-up procedures or hospitalizations within five years are relatively common, affecting roughly a third of patients. If the idea of a second surgery down the line is a dealbreaker for you, that’s worth sitting with before you schedule anything, especially if you want the fuller picture of long-term complications after gastric bypass.

Will You Be on Vitamins for the Rest of Your Life?

For most bariatric procedures, yes. This is the part I underestimated most. NIDDK is plain about it: taking prescribed vitamins and minerals after surgery isn’t optional, because the same procedures that limit how much you eat also limit how much your body absorbs. Skip it long enough and NIDDK lists anemia and osteoporosis as real long-term risks.

That means labs, pills, and a level of ongoing attention to your own nutrition that doesn’t end when the incisions heal. If you already struggle to keep up with a daily medication routine, this is worth being honest with yourself about.

Does the Weight Always Stay Off?

Not for everyone, and that surprises a lot of people. A scoping review of bariatric surgery outcomes found an average of 56% of patients regained some weight within ten years, and roughly one in four start regaining before their first post-surgery year is even over.

Regain doesn’t mean the surgery failed. It means the surgery is a tool that changes your stomach or intestines, not your relationship with food, stress, or habits. Those still take ongoing work afterward. If you’re picturing surgery as a one-time fix you never have to think about again, that expectation is worth adjusting now rather than later.

What Does It Cost If Insurance Won’t Cover It?

This one catches people off guard. ASMBS’s Access to Care Fact Sheet reports that about 25% of patients considering bariatric surgery are denied coverage three times before getting approved, and roughly 60% of those patients say their health got worse while they waited. Some insurance plans exclude bariatric surgery from coverage entirely.

If that’s your situation, you’re looking at a real out-of-pocket cost on top of the required pre-surgery evaluations, labs, and long-term follow-up visits. That’s a legitimate financial reason to pause, and it has nothing to do with whether surgery would work for you medically.

Is Bariatric Surgery Right for Everyone?

No. NIDDK lays out the medical criteria: generally a BMI of 40 or higher, or 35 or higher with a serious weight-related health condition, or 30 or higher with hard-to-control type 2 diabetes, criteria that also shape which procedure might be recommended, like the more aggressive duodenal switch for more severe cases. It also expects a documented history of trying nonsurgical approaches first and a real commitment to lifelong follow-up.

Mental health matters here too. A descriptive study of bariatric surgery exclusions found active eating disorders, uncontrolled mood or anxiety disorders, and impulse control disorders were among the most common reasons candidates were turned away, because surgery asks you to change eating behavior in a way that’s genuinely hard to do without some baseline stability first. None of this is a moral judgment. It’s just a mismatch between the timing and the tool.

What Are the Alternatives?

Surgery isn’t the only path, and it isn’t always the first one a provider recommends. NIDDK covers prescription weight-loss medications, including GLP-1 drugs like semaglutide and liraglutide, as an option for adults with a BMI of 30 or higher, or 27 or higher with a weight-related condition. It notes these medications work best paired with a lifestyle program, and that a provider might raise surgery as a next step if medication hasn’t helped after about 12 weeks.

I’m not going to tell you which path fits your situation. That’s a conversation for you and your own doctor, based on your health history, not something a blog post can responsibly decide for you.

So, Should You Rule It Out?

Maybe, maybe not. I don’t regret my own surgery, but I also went in with clear eyes about the vitamin routine, the risk of regain, and the fact that this wasn’t a shortcut. If any of the reasons above land differently for you, that’s not a reason to feel behind. It’s information. Bring this list to an actual conversation with a bariatric surgeon or your primary care provider, and let them weigh it against your specific health history. That’s a better decision than anything I can make for you from here.