Dr. Ahmed Farhan
Most people who lose weight gain at least some of it back. If you’ve ever done this, you probably felt like you were back to square one. Like the hard work never happened.
A new study says that might not be true. Not completely.
Researchers followed people for up to 10 years after they took part in a weight-loss program. Many of them gained the weight back.
But the people who had lost a specific kind of fat — the fat packed around their internal organs — still had a lower risk of getting type 2 diabetes. Even years later. Even after the scale went back up.
This article looks at what the study found, why it matters, and what it does and doesn’t tell us about weight, fat, and long-term health.
Why This Study Is Getting Attention Right Now
Weight regain is the norm, not the exception. Most people who lose a meaningful amount of weight through diet and lifestyle changes will regain 30% to 35% of it within a year.
About half will be back to their starting weight within five years. This isn’t a personal failure. It’s how the body tends to respond to weight loss — it pushes back, often by lowering how many calories you burn at rest and increasing hunger.
Because regain is so common, many people assume it cancels out the health benefits of the weight they lost. This new study, published in the medical journal Circulation, is one of the first to actually test that assumption over a long period of time, using detailed body scans instead of just tracking weight on a scale.
What the Researchers Actually Did
The study followed people who had originally taken part in two well-known weight-loss trials in Israel, called CENTRAL and DIRECT-PLUS. In both trials, participants followed different types of diets — including Mediterranean-style eating plans — combined with exercise, for about a year and a half.
What makes this new study unusual is what happened next. Researchers tracked down 366 of the original participants — 96% of everyone they were looking for — and brought them back for MRI scans five and then ten years later.
An MRI is a type of body scan that can “see” fat inside the body, not just measure it from the outside. This let the researchers measure exactly how much fat people had in different places: around their belly organs, inside their liver, inside their pancreas, and just under their skin.
Because they had this level of detail, the researchers could ask a much more specific question than “did weight loss help?” They could ask: which specific type of fat loss actually mattered, years down the road, regardless of what happened to a person’s overall weight afterward?
What They Found: Belly Fat Loss Left a Lasting Mark
Here’s the key result. People who lost more visceral fat — the fat that wraps around organs deep in the belly — during the original 18-month program had a lower risk of developing type 2 diabetes over the following years.
This held up even after accounting for how much weight they had regained, what they were eating at follow-up, and how physically active they were.
The size of the effect was meaningful. Every 10% reduction in visceral fat during the original program was linked to a 28% lower chance of developing type 2 diabetes later on.
People who lost more visceral fat also tended to have better blood sugar control and lower overall cardiometabolic risk — a combined measure of things like blood pressure, cholesterol, and blood sugar — years after the study officially ended.
Just as interesting is what didn’t show this pattern. Fat lost from the liver and the pancreas didn’t stick around — it came back, often fully, once people regained weight.
Fat just under the skin, called subcutaneous fat, didn’t show the same long-term protective link either. Only visceral fat loss seemed to leave a lasting “memory” in the body’s metabolism.
The lead researcher, Prof. Iris Shai of Ben-Gurion University of the Negev, described this as challenging “the traditional narrative that weight regain equals failure.”
Her team’s conclusion was direct: the target that matters most for long-term health may not be the number on the scale at all. It may be where the fat is stored, and specifically whether visceral fat was reduced in the first place.
Why Belly Fat Is Different From Other Body Fat
Not all fat in your body acts the same way. Subcutaneous fat — the soft, pinchable fat just under your skin — mostly just stores energy.
Visceral fat is different. It sits deep in your belly, wrapped around organs like your liver and intestines, and it behaves almost like a gland.
It releases chemicals that can trigger low-level inflammation throughout your body, interfere with how your cells respond to insulin, and add strain to your liver.
This is why two people can weigh the same amount and have very different health risks, depending on how their fat is distributed.
Someone with more visceral fat and less subcutaneous fat tends to be at higher risk for type 2 diabetes and heart disease, even at the same body weight as someone else.
This new study adds an important piece to that picture: it’s not just that visceral fat is riskier to carry right now. Reducing it appears to leave behind some kind of protective effect that can outlast weight regain itself.
Researchers don’t yet know exactly how the body “remembers” this, but changes at the level of fat cells and how they behave over time are one likely part of the explanation.
What This Means for Anyone Who’s Ever Regained Weight
If you’ve lost weight in the past and gained some or all of it back, this study offers a different way to think about that experience.
The number on the scale isn’t the only thing that mattered during the time you were at a lower weight. If you lost belly fat during that period — even temporarily — you may have gained some lasting protection against type 2 diabetes, separate from whatever your weight looks like today.
This doesn’t mean weight regain has zero consequences, or that it’s fine to expect regain and not try to prevent it. It means the full story of what a past weight-loss effort did for your body is more complicated than “it didn’t work because I gained the weight back.”
What We Know
- Visceral fat, the fat around your belly organs, is strongly and consistently linked to type 2 diabetes risk, in this study and in many others before it.
- In this 10-year follow-up, losing visceral fat during a structured lifestyle program was linked to a lower diabetes risk years later, even in people who regained weight.
- This link held up after researchers accounted for weight regain, diet, and physical activity levels at follow-up.
- Fat lost from the liver and pancreas tended to return once people regained weight, unlike some of the visceral fat benefit.
What We Don’t Know
- This study shows an association, not proof of cause and effect. It’s possible that something else about the people who lost more visceral fat — genetics, other health habits, or something not measured — explains part of the pattern.
- The study followed people who completed structured, well-supported diet and exercise programs. It’s not yet clear whether the same “lasting protection” would show up in less structured, real-world weight-loss attempts.
- Researchers don’t yet know the exact biological mechanism behind why visceral fat loss seems to leave a longer-lasting mark than fat loss elsewhere in the body.
- It isn’t yet known how long this protective effect lasts beyond the 10 years measured here, or whether it fades over time.
Common Misconceptions
“If I regain the weight, I’ve undone all my progress.” This study directly challenges that idea, at least for diabetes risk tied to visceral fat. Some benefit may persist even after regain.
“All body fat is the same, so it doesn’t matter where I lose it.” This study, along with a large body of earlier research, shows this isn’t true. Where fat is stored in the body changes how much it affects your health.
“This means weight regain is fine and I don’t need to worry about maintaining my weight loss.” That’s not what the study shows. Weight regain still comes with its own downsides, including added strain on the heart and blood vessels documented in other research. This study simply shows that one part of the earlier benefit — tied specifically to visceral fat — may not disappear along with the regained weight.
Who Should Pay the Most Attention to This
This research is most relevant to people who have already been through at least one round of intentional weight loss and regain — something that describes a very large share of adults who have ever dieted.
It’s also relevant to anyone who has felt discouraged or given up on future health efforts because a past attempt at weight loss didn’t “stick.”
People with prediabetes, a family history of type 2 diabetes, or existing insulin resistance may find this especially meaningful, since visceral fat plays a direct role in how the body handles blood sugar.
Practical, Evidence-Based Steps
None of this is about achieving a specific number on a scale. Based on this study and the broader research on visceral fat, here are reasonable, evidence-based takeaways:
- Aim to reduce visceral fat specifically, not just body weight. Waist circumference is a simple, low-cost way to track this at home, since it reflects belly fat better than weight alone.
- Regular aerobic activity — brisk walking, cycling, swimming, or similar — has repeatedly been shown to reduce visceral fat, sometimes even without major changes in overall body weight. Some research suggests aerobic exercise may reduce visceral fat more than an equivalent amount of weight lost through diet alone, though study results here are mixed, so think of exercise as a strong complement to, not a replacement for, dietary changes.
- A Mediterranean-style eating pattern — the kind used in the original trials behind this study — has consistently been linked to reductions in visceral and liver fat in research.
- If you’ve regained weight after a past effort, this study suggests it’s reasonable to feel less like you’re starting from zero. A past period of visceral fat loss may still be doing some quiet, long-term work in your body.
- Don’t chase visceral fat loss through extreme or rapid weight-loss methods. The benefits shown in this study came from a structured, sustained 18-month lifestyle program, not a crash diet.
FAQ
Does this mean weight regain doesn’t matter at all?
No. Weight regain still carries its own health considerations, including effects on the heart and blood vessels shown in other research. This study shows that one specific benefit — lower diabetes risk tied to visceral fat loss — may persist even through regain. It doesn’t erase every downside of regaining weight.
How do I know if I have too much visceral fat?
The most precise way to measure it is through imaging like MRI or CT scans, which most people won’t have access to for this purpose. A simpler, practical stand-in is waist circumference, since visceral fat tends to show up as a firmer, deeper belly rather than a soft, pinchable layer.
Does exercise or diet reduce visceral fat better?
Research is mixed. Some studies suggest aerobic exercise can reduce visceral fat even without large weight changes, while other analyses find no clear difference between exercise and calorie-reduced diets. Most evidence points to combining both as the most reliable approach.
If I’ve never lost weight before, does this study still apply to me?
The study specifically followed people who had already gone through a structured weight-loss program. It doesn’t tell us what happens for people who haven’t yet tried to lose weight, but the underlying point — that visceral fat specifically matters for long-term diabetes risk — applies broadly.
Can I lose visceral fat without losing weight overall?
Some research suggests it’s possible to reduce visceral fat somewhat even with modest or no overall weight change, especially through regular aerobic exercise. But most of the strongest evidence, including this study, comes from programs that also achieved meaningful weight loss during the initial phase.
Conclusion
Weight loss is often talked about as if it only “counts” when it lasts forever. This study pushes back on that idea, at least when it comes to one important type of fat and one serious disease.
People who reduced visceral fat during a structured program still carried a lower diabetes risk a decade later, even after gaining weight back.
That doesn’t mean weight regain is harmless, or that maintaining a lower weight isn’t worth pursuing. It means that a past effort to lose belly fat specifically may have done more lasting good than the number on today’s scale suggests.
For anyone who has felt like a past weight-loss attempt “didn’t work” because the weight came back, this research offers a more complete — and more encouraging — version of the story.
References
1. Klein H, Alufer L, Goldberg Toren DT, et al. Lifestyle-Induced Visceral Fat Loss as a Key Target for Durable Cardiometabolic Health: MRI-Assessed 5- and 10-Year Follow-Up After 2 Clinical Trials. Circulation. 2026. DOI: 10.1161/CIRCULATIONAHA.125.079009.
2. American College of Cardiology. Follow-Up of CENTRAL, DIRECT-PLUS Suggests Visceral Fat Reduction Has Lasting Metabolic Health Benefits. ACC.org, June 2026.
3. Ben-Gurion University of the Negev / EurekAlert. Visceral fat loss leaves 10-year “metabolic legacy,” cutting diabetes risk by 28% despite weight regain. June 2026.
4. The Media Line. Lifestyle Changes May Protect Against Diabetes Even After Weight Regain: Ben-Gurion Study. June 2026.
5. Harvard Health Publishing. Taking Aim at Belly Fat.
6. Cleveland Clinic. Visceral Fat vs. Subcutaneous Fat: What’s the Difference?
7. Medscape Medical News. ‘Vicious Cycle’: Are There Benefits to ‘Yo-Yo Dieting?’
8. Systematic reviews and meta-analyses of exercise interventions on abdominal visceral and subcutaneous fat (ScienceDirect / PMC).
