What is fat memory?
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The concept of "fat memory" is not proven in the same way as muscle memory, but there is an argument related to behavioral patterns that may contribute to weight regain. According to and from the , although fat cells themselves don’t have a memory like muscle cells, the behaviors associated with weight gain are hard to change. When you lose weight, it's challenging to permanently alter these behaviors, which often leads to regaining the weight. Additionally, once you gain weight and add fat cells, they remain even if they shrink after losing weight, which may facilitate faster weight regain in the future 1.
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