Do you find it easy to regain weight after you’ve lost it? Well you may not be a lone.
A recent 2017 study stated that:
Approximately 50% of weight variance is reported to be determined by genetics and 50% by the environment (energy-dense foods and reduced physical activity). Body weight is tightly regulated by hormonal, metabolic, and neural factors. Hormonal adaptations (decreases in leptin, peptide YY, cholecystokinin, and insulin and increases in ghrelin, glucagon-like peptide 1, gastric inhibitory polypeptide, and pancreatic polypeptide) encourage weight gain after diet-induced weight loss and continue for at least 1 year after initial weight reduction. Weight loss also results in adaptive thermogenesis (decreased resting metabolic rate), which is also maintained long-term. Neural factors such as dopamine also signal the need to respond to an increased desire for fatty foods after weight loss.
Essentially the body appears to fight the fat loss and adjust brain happiness levels to attempt to get one to eat more food to encourage weight gain
Study can be read here – https://www.ncbi.nlm.nih.gov/pubmed/28848306
