纖體天成體重管理與代謝手術中心Weight Loss and Metabolic Surgery Center
纖體天成體重管理與代謝手術中心Weight Loss and Metabolic Surgery Center
Weight is a medical problem. From lifestyle changes to metabolic surgery, what I do is help you find the path that's actually right for you.
BMI tells you the ratio of your weight to your height. What it doesn't tell you is where your body fat is stored, how much muscle you have, or how much metabolic reserve you have left. Those are the things that actually determine what kind of help you need.
The 2022 ASMBS/IFSO guidelines (the most current international consensus) set the threshold for Asian patients at BMI ≥ 27.5 as a recommendation for consideration. This isn't because the standard has become more lenient. It's because the evidence has accumulated: Asian bodies accumulate visceral fat earlier and at lower BMI values than in Western populations, and the metabolic consequences appear sooner.
At BMI 30, one person might have very high body fat and severely depleted muscle. Another might have high muscle mass with borderline fat. These two people need completely different interventions.
Body composition analysis (measuring fat mass, muscle mass, visceral fat, and metabolic rate) gives us the real picture behind the number. If you have a recent body composition report, bring it to your first consultation. If you don't, we'll run one.
"Your BMI might look acceptable. Your metabolic markers might be telling a different story."
— Dr. Kong-Han Ser
Obesity (especially when combined with metabolic syndrome) is a complex physiological state, not a personal failure. The hunger signals, fat storage mechanisms, and insulin responses in a metabolically affected person are genuinely different from those in someone without those conditions. Fighting a dysregulated physiology with willpower alone isn't a fair fight.
I organize treatment into four levels, from the most conservative to the most intensive. Different people need different starting points, and that can change over time. No level is better or more advanced than another. The right level is the one that fits where you are right now.
You've probably tried before. You've dieted, exercised, followed plans. If you're here, this probably isn't your first attempt at change.
I'm not going to send you back down that same road. What I call lifestyle management isn't "eat less, move more." It's a structured, monitored program with a team behind you.
At our center, lifestyle management means a coordinated care plan, not a printed sheet and a wish for good luck. The people involved:
The goal isn't just weight loss. It's finding a metabolic state your body can sustain. This level is right for patients beginning their evaluation, for those who want to try a non-surgical approach seriously, and for patients post-surgery who need long-term support, surgery doesn't end the journey, it changes it.
I've followed this class of medication for years, not because it's trendy, but because its mechanism is the closest thing I've seen to addressing the actual biology. It doesn't ask you to overcome your hunger with willpower. It changes the signal.
I use GLP-1 as a legitimate treatment tool, not a consolation prize for patients who "can't" have surgery. And I don't support obtaining it independently and self-administering without proper follow-up. The dose needs to be titrated, the response needs to be monitored, and some patients need to be screened out before starting.
I'm not a GLP-1 salesman. I'm not a GLP-1 skeptic. I use it carefully, and I take it seriously.
GLP-1 receptor agonists (Glucagon-Like Peptide-1) work by stimulating insulin secretion, suppressing glucagon, slowing gastric emptying, and acting directly on the brain's satiety center. Common agents available in Taiwan include Ozempic® (semaglutide 0.5/1mg), Wegovy® (semaglutide 2.4mg), and Saxenda® (liraglutide).
Clinical trials demonstrate 10–15%+ total body weight loss, with additional cardiovascular and metabolic protective effects well documented in large RCTs.
People ask: "If I use GLP-1, will I still need surgery?" My answer: not necessarily. For some patients, GLP-1 opens a door to stable metabolic health that lasts. For others, it becomes part of the journey toward surgery, or toward long-term post-surgical maintenance. There's no standard answer, only what makes sense for your situation at this point in time.
I don't think of GLP-1 as a "try it first" fallback. Used correctly, it's one of the most important tools in metabolic treatment today.
If you've considered making a change but hesitate the moment surgery is mentioned, there are options you may not have heard of.
These procedures aren't a budget alternative to metabolic surgery. They're a distinct option for the right patient. Two main approaches:
A silicone balloon is placed into the stomach via endoscope. It occupies space to reduce capacity and promote earlier satiety. Typically removed after 6 months. No surgery, no general anesthesia, the least invasive option in this category.
Patients with lower BMI who need a tool to build better eating habits, or as a bridge before metabolic surgery.
Weight regain after balloon removal is common. Results depend heavily on lifestyle changes during the balloon period.
The stomach is sutured endoscopically to reduce its volume, no incisions, no external scars. Average total body weight loss of 15–20%, with faster recovery than laparoscopic surgery.
Patients who don't meet the criteria for metabolic surgery, or who want a non-laparoscopic option. Also used as bridging treatment before surgery.
ESG has no external incisions, but it carries real risks comparable to those of metabolic surgery. This is not a decision to make lightly.
The question I ask isn't "are you willing to have surgery?" It's "will this option actually solve your problem?" Minimally invasive procedures have real value, but I won't recommend an option that's insufficient for your situation just because the word surgery makes you uncomfortable. If your condition calls for something more, I'll tell you directly.
One of the most common things I hear is: "Does choosing surgery mean I've given up on myself?"
My answer has never changed: no. Metabolic surgery isn't giving up. It's choosing a solution that has decades of clinical evidence behind it, after understanding clearly what your body is doing and why.
4,000 cases. I don't think of that as a score. Each one is a real person, with real expectations, real fears, and a real life. What I demand of myself in the operating room doesn't decrease because it's my 4,001st case.
Metabolic surgery isn't just "making the stomach smaller." It restructures the anatomy of the digestive system in ways that change how your body processes energy. The altered anatomy changes the secretion patterns of gut hormones (including GLP-1) and reshapes how the brain and gut communicate about hunger, satiety, and blood glucose. This is why blood sugar often improves before significant weight loss even occurs.
Core mechanism: Approximately two-thirds of the stomach is removed, creating a narrow tube. This reduces capacity and removes the primary region that secretes ghrelin, the hormone that drives hunger. The intestinal pathway is not altered.
Core mechanism: The stomach is reshaped and the intestinal pathway is rerouted, achieving both restriction and reduced absorption. The altered anatomy triggers significant changes in gut hormone secretion, with particularly strong effects on type 2 diabetes remission.
A small gastric pouch (~30cc) is created and connected to the small intestine via two anastomoses, bypassing the duodenum and proximal jejunum. Combines restriction and malabsorption with strong hormonal effects on insulin resistance.
The longest track record of any bypass procedure. The anatomy provides a physical anti-reflux mechanism, the preferred option for patients with significant pre-existing GERD.
Higher surgical complexity and duration. Specific risk of internal hernia at mesenteric defects. The bypassed stomach cannot be accessed by endoscopy. Lifelong micronutrient supplementation required.
The stomach is reshaped into a long tubular pouch connected to the small intestine at a single anastomosis. Simplifies the RYGB structure while achieving comparable weight loss and diabetes remission.
Shorter operative time. Lower internal hernia risk than RYGB. Equivalent long-term weight loss and T2D remission outcomes.
Lacks the anti-reflux anatomy of RYGB, bile reflux risk in some patients. Esophageal health should be assessed carefully pre-op. Lifelong micronutrient supplementation required.
Core mechanism: Combines sleeve gastrectomy with an intestinal bypass to create a "dual channel", food travels both the natural route and the bypassed pathway. This preserves some natural digestion while precisely amplifying distal gut hormone secretion (especially GLP-1) for metabolic remodeling. The two procedures differ only in where the intestinal connection is made: ileum (SASI) or jejunum (SASJ).
Two-thirds of the stomach is removed and connected to the distal ileum. The food shortcut reaches the ileum directly, producing a powerful GLP-1 surge and strong glucose control.
Exceptional GLP-1 stimulation. Expected TBWL 30–35% with strong metabolic improvement. Particularly effective for T2D remission.
Greater impact on absorption, strict vitamin and protein supplementation required. Some patients experience increased stool frequency early post-op.
Two-thirds of the stomach is removed and connected to the proximal jejunum. The shorter bypass reduces gastric pressure and tends to improve GERD, while triggering metabolic adaptation with a lower impact on nutrient absorption.
Acts as a pressure-relief valve, meaningfully improves post-op GERD. Lower impact on micronutrient absorption, reducing the nutritional management burden.
Slightly lower weight loss and glucose control intensity compared to SASI. Newer procedure, surgeon experience with jejunal anastomosis is worth confirming.
I don't decide which procedure you get in the consultation. What I do is explain the trade-offs of each option clearly, expected outcomes, what you'll need to commit to, and my clinical read of your specific situation. Then we discuss.
The key factors: your current BMI and comorbidities, whether you have pre-existing GERD, your tolerance for post-op lifestyle requirements, and my overall clinical assessment. These aren't boxes on a form. They're a real conversation.
"Every procedure has the patient it's right for. Finding the one that's genuinely right for you matters more than chasing the strongest option."
| Metric | SG | RYGB | OAGB | SASI | SASJ |
|---|---|---|---|---|---|
| Expected TBWL | 25–35% | 30–35% | 30–35% | 30–35% | 30–35% |
| T2D improvement | Moderate | Strong | Very strong | Very strong | Very strong |
| GERD effect | May worsen | Usually improves | Evaluate first | Evaluate first | Usually improves |
| Intestinal rerouting | No | Yes | Yes | Yes | Yes |
| Reversibility | Irreversible | Reversible | Reversible | Irreversible | Irreversible |
| Long-term data | Extensive | Most extensive | Strong | Growing | Growing |
Source: TMBSDA Metabolic Surgery Guide. Figures are general reference ranges; individual results vary.
Every consultation starts with Dr. Ser listening. No predetermined plan, just a clear look at where things stand.
Book a consultationEnter your numbers. We'll highlight the level that fits your situation, based on the 2022 ASMBS/IFSO guidelines for Asian patients.
Go back and read the full explanation first(e.g. hypertension, type 2 diabetes, sleep apnea)
BMI < 27.5. Build a sustainable metabolic foundation with a clinical team.
Read details → Level 2BMI ≥ 27. Work with your body's own hunger and metabolism signals.
Read details → Level 3No cuts, no scars, done entirely through the mouth. Real results, real risks.
Read details → Level 4BMI ≥ 27.5 with comorbidities, or ≥ 32.5. The most durable option for the right patient.
Read details →Not knowing where to start is exactly why the consultation exists. Come in, and we'll find the right starting point together.
Book a consultation● Regular session · Appt By appointment only
Dr. Ser may occasionally be unavailable due to conferences. Please call to confirm before your visit.
Closed on national holidays.
Ten Chan Hospital · General Building, 3F
No. 155 Yanping Road, Zhongli District, Taoyuan City, Taiwan