Weight loss is not simply a test of willpower. The human brain evolved to protect body fat during times of scarcity, and it can treat a previously higher weight as the new normal, triggering stronger hunger, cravings, and lower energy use after weight loss. This biological “memory” helps explai...
Source: [ScienceDaily](https://www.sciencedaily.com/releases/2026/08/260803080902.htm)