If you’ve ever wondered whether bariatric surgery can truly reverse diabetes, you’re not alone. Dr. Lindsey VanDyke, board-certified endocrinologist and founder of the Advanced Institute for Diabetes and Endocrinology (AIDENDO), sat down with Dr. Elizabeth Hooper—a highly trained metabolic surgeon at DFW Bariatrics—to unpack what the research says, what patients experience, and why surgery might be more than a last resort.
Their conversation, originally featured on Dr. VanDyke’s YouTube channel, offers clarity and guidance for anyone navigating diabetes, obesity, and the often-misunderstood realm of metabolic surgery.
Meet Dr. Hooper: Training Across the Nation
Dr. Hooper earned her medical degree from the University of Oklahoma, completed general surgery residency at Rush University in Chicago, and then pursued advanced fellowship training in bariatric surgery at Tufts in Boston. She now practices with DFW Bariatrics and collaborates closely with Dr. VanDyke, seeing patients in her Mansfield office.
“We stamp out metabolic disease together,” Dr. VanDyke notes.
What Is Metabolic Surgery, Really?
Many patients are surprised to learn that bariatric—or metabolic—surgery can put diabetes into remission. But how is that possible?
“We’re not doing anything to the pancreas,” Dr. Hooper explains. “We’re changing the metabolic and hormonal signals through surgical changes to the stomach and intestines.”
This metabolic shift can result in normalized A1C levels, often within days of surgery. While some patients may see blood sugars creep up years later, many experience significant improvement—or even remission—for long periods.
The Fast Drop in Insulin Needs
So just how fast does this metabolic shift occur?
“Insulin needs often drop dramatically,” says Dr. Hooper. “Most of my patients go home from surgery needing no insulin or a dramatically reduced dose.”
This is due to a combination of changes:
- Altered gut hormone signaling
- Improved insulin sensitivity
- Post-op dietary changes (typically low carb)
“I usually let people run a bit high for a few days post-op to see how they stabilize,” Dr. Hooper adds. “Then we make safe adjustments.”
Modern Tools and Robotic Precision
All surgeries in her practice are performed minimally invasively, typically using the da Vinci robotic system. This allows for small incisions, reduced recovery time, and increased surgical precision.
“It’s like having a wrist inside the body,” Dr. Hooper says. “It gives me a level of dexterity that’s unmatched.”
Which Surgery Works Best for Diabetes?
Different surgeries offer different benefits:
- Duodenal switch: Most powerful for diabetes remission and weight loss
- Gastric bypass: Very effective—over 80% diabetes remission
- Sleeve gastrectomy: Less complex, but still improves blood sugar for many
However, outcomes vary based on individual factors, such as how long a person has had diabetes and whether they’ve been insulin-dependent for years.
The Real-World Impact: A Patient Example
Dr. VanDyke recalls a patient on 1,100 units of U-500 insulin daily—a staggering dose. While specific post-op outcomes vary, both doctors agree that metabolic surgery in such cases can cut insulin needs by 50% or more.
“That’s someone I’d keep in the hospital longer to monitor closely,” Dr. Hooper notes. “And I’d lean on you as the endocrinologist to fine-tune care.”
Surgery vs. GLP-1 Medications
With the rise of GLP-1 medications like Zepbound (tirzepatide), patients often wonder: why bother with surgery?
Dr. Hooper’s answer is clear: “Medications like ZepBound can lead to 15% weight loss for diabetics, which is great. But surgery still outperforms that—up to 40%+ weight loss in some procedures.”
And while GLP-1s are effective, response varies widely. Some patients are “super-responders” while others barely lose weight—or even gain.
“Just like meds, there are low-responders to surgery too,” Dr. Hooper says. “But surgery is a tool you carry with you. It’s permanent.”
Is Surgery Too Extreme?
One of the most common objections from patients?
“It feels too extreme.”
Dr. Hooper empathizes but provides context: “Modern bariatric surgery is as safe as gallbladder surgery. We now have calculators and tools to predict outcomes and risks.”
Safety isn’t the only factor. Readiness matters too. Patients must be committed to long-term follow-up, nutritional monitoring, and lifestyle changes.
Who’s a Good Candidate?
International guidelines recommend surgery for:
- BMI over 35 with diabetes
- Sometimes even BMI 30–35 with other risk factors
“But ultimately, the best candidate is someone who wants to learn more and decides this is the right tool for them,” Dr. Hooper says.
Why Diabetes Can Return—and What to Do
Even after remission, diabetes can resurface 3, 5, or 10 years down the road. It’s not failure—it’s biology.
“We need to educate patients on what their bodies are designed to do,” says Dr. VanDyke. “Our cells haven’t figured out Uber Eats. They conserve when calories drop.”
Understanding this helps patients prepare and sustain their health long-term.
Final Thoughts from Dr. VanDyke
“I love working with Dr. Hooper and her team. These are the kinds of conversations we need more of—deep dives that combine surgical insight with endocrinology expertise.”
If you’re exploring options for diabetes or weight-related health issues, watch the full video interview with Dr. Hooper on YouTube.
➡️ Watch the video here
And if you’re in Texas, Oklahoma, California, New Mexico, Oregon, Colorado, or Washington—you can now book a telehealth consultation with Dr. VanDyke at aidendo.com.