The adipose tissue, the “fat” of our body, has a surprising ability to adapt. A recent study reveals that it can truly regenerate and regain a healthy state after significant weight loss, challenging the idea of a permanent memory left by obesity. This discovery is the result of research by scholars at the University of Southern Denmark. Published in Nature Metabolism, their research focuses on observing cellular transformations during weight reduction.
After bariatric surgery (such as gastric banding) and substantial weight loss, adipose tissue samples show notable improvements. For example, the number of immune cells linked to inflammation drastically decreases to levels comparable to those of thin individuals. This decrease promotes better insulin sensitivity and helps reduce metabolic risks like type 2 diabetes.
For more modest reductions, between 5 and 10%, scientists did not observe a significant decrease in inflammation. However, they noticed a change in genetic activity that encourages the formation of new adipose cells, potentially more functional. This phenomenon could account for early clinical improvements in health, even with limited weight loss.
Among other positive changes, there is an increase in cells that form blood vessels. This adaptation improves tissue oxygenation and nutrition, contributing to its restoration. Overall, gene expression profiles tend to normalize, indicating a return to a state similar to that of individuals who have never experienced obesity.
These observations help understand the mechanisms through which weight loss protects against diabetes and cardiovascular diseases. Adipose tissue demonstrates a real ability to recover, showing that the harmful consequences of obesity are not irreversible and that restoring health is possible.
