Weight Set Point Theory posits that the body has a preferred weight range it strives to maintain through hormonal regulation, metabolic adaptation, and energy expenditure. Key hormones like leptin and ghrelin play crucial roles in this process, influencing appetite and metabolism. Evidence from studies like the Minnesota Starvation Experiment supports the theory, highlighting the body's tendency to return to its set point weight after weight loss as do twin studies which show whether they are raised together or apart there are weight similarities due to genetics. However we are only aware of genes that influence up to 10% of body weight at this stage even though 50% of our weight is said to be genetically determined however critics argue that environmental factors and behavioural changes also significantly impact weight regulation. Understanding this theory emphasizes the importance of realistic weight goals, personalized approaches, and overall health rather than just focusing on the number on the scale. At the end of the day, quality of life and longevity is linked to our ‘health span’ not our weight on the scales.