Even after drastic weight loss, the body’s fat cells carry the ‘memory’ of obesity, research¹ shows — a finding that might help to explain why it can be hard to stay trim after a weight-loss programme.

This memory arises because the experience of obesity leads to changes in the epigenome — a set of chemical tags that can be added to or removed from cells’ DNA and proteins that help to dial gene activity up or down. For fat cells, the shift in gene activity seems to render them incapable of their normal function. This impairment, as well as the changes in gene activity, can linger long after weight has dropped to healthy levels, a study published today in Nature reports.

Fat cells have a ‘memory’ of obesity — hinting at why it’s hard to keep weight off – www.nature.com/articles/d41586-024-03614-9

For the geeks, here’s a link to the original study – https://doi.org/10.1038/s41586-024-08165-7

Even without this study I already knew my fat cells have a memory because they are constantly trying to make me gain weight.