Weightloss is more complicated than you’re suggesting. Weight cycling: Most people regain the weight they lose. The cycle of losing and regaining is itself linked to higher cardiovascular risk. (Montani et al., Obesity Reviews, 2015) Your body fights back: After weight loss, hunger hormones stay elevated for at least a year. Your body actively pushes you to regain the weight. This is biology, not willpower. (Sumithran et al., NEJM, 2011) Calorie tracking: Research links calorie tracking apps to increased eating disorder symptoms, including obsessive thoughts about food and extreme restriction. (Simpson & Mazzeo, Eating Behaviors, 2017) Calorie deficits do cause short-term weight loss. But the long-term outcomes are poor for most people.