Q. My period becomes irregular every time I start dieting. Is there a connection between weight loss and my menstrual cycle?

It is naturally alarming when your period stops or the flow decreases during a diet. From a biomedical perspective, a decrease in leptin—a hormone secreted by fat cells—signals the hypothalamus to halt the regulation of female hormones to prioritize survival over reproduction. In Traditional Korean Medicine (TKM), we view this as 'Spleen Deficiency' (脾虛) and 'Blood Deficiency' (血虛). When the Spleen's function of transforming nutrients is weakened, the body lacks the resources to produce 'Blood,' leaving the uterus undernourished. This is critical because a disrupted cycle triggers a metabolic slowdown; your body enters a protective mode, clinging to energy stores rather than burning them. This explains why many people stop losing weight despite eating very little. Irregular menstruation is a warning that your dieting efficiency has plummeted. Instead of further restriction, you must replenish 'Blood' and invigorate 'Qi' to restore your internal systems. Only by normalizing your hormonal balance can you break through a plateau and return to a healthy, weight-losing constitution. Let’s work together to assess your condition and find a balanced approach.