The impact of skipping breakfast on weight is complex and depends on individual habits and body responses. While traditionally believed to boost metabolism and control blood sugar, skipping breakfast can lead to weight loss if it reduces overall daily calorie intake without compensatory overeating. However, it may also cause increased hunger, larger portion sizes, and unhealthy food choices later in the day, potentially negating weight loss benefits. The necessity of breakfast varies for individuals like young people, athletes, and diabetics.