New research shows that losing weight may not be enough to prevent type 2 diabetes for everyone. A study published in Diabetes found that some people who lost weight and kept it off for years still developed the condition.
Study details
Researchers from the Tübingen Lifestyle Intervention Program, known as TULIP, followed 190 adults at risk for type 2 diabetes. Participants went through a two-year lifestyle program and were then tracked for about nine years.
Before the program began, researchers divided participants into six groups based on how their bodies processed blood sugar. This included how well their cells responded to insulin and how effectively their pancreas produced it.
Two groups were identified as high-risk. One group had weaker insulin production, called cluster 3. The other group, cluster 5, included older participants with higher body weight whose cells did not respond well to insulin.
The analysis focused on 60 people who lost at least 3 percent of their body weight, averaging 8 percent, and kept the weight off.
Results varied by group
Among those who maintained their weight loss, the outcomes were different depending on their metabolic group. People in cluster 5, those with an insulin resistant profile, saw their fasting blood sugar and post-meal glucose levels rise more than other groups over time. Their bodies also became less effective at producing insulin.
Despite losing weight and keeping it off for nearly a decade, 41 percent of cluster 5 participants developed type 2 diabetes. In comparison, 0 percent of lower-risk groups developed the condition, and 10 percent of cluster 3 participants did.
Researchers concluded that people with this metabolic profile may need more targeted approaches beyond standard diet and exercise advice.
What this means
The study highlights that weight is only one part of the equation. Two people can follow the same diet, exercise the same amount, and lose the same percentage of body weight, yet have different outcomes.
The cluster 5 profile suggests that for some people, the body’s blood sugar regulation system is already struggling in ways that weight loss alone cannot fully fix. How well the pancreas produces insulin, how cells respond to it, and where the body stores fat all play a role.
This does not mean lifestyle changes are useless for high-risk individuals. But it does suggest that relying only on the scale to measure metabolic health may miss important warning signs.
Other factors in metabolic health
Doctors can check metabolic markers such as fasting glucose, fasting insulin, HbA1c, and a lipid panel. These give a fuller picture of metabolic health than weight alone. Strength training helps regulate blood sugar because muscle tissue is metabolically active. Resistance training improves how cells respond to insulin, independent of weight loss.
Meals built around protein and fiber help keep blood sugar steady. Poor sleep can throw off blood sugar regulation and make cells less responsive to insulin. Chronic stress raises cortisol, which can increase blood sugar and promote fat storage around the midsection. Genetics also play a significant role in diabetes risk.
Weight loss can be a powerful tool for metabolic health, but it is not a guarantee against diabetes for everyone. Understanding individual metabolic profiles and taking a comprehensive approach may be necessary.
