📝 Detailed Answer
Before becoming a practitioner of Korean Medicine, I also tried reckless fasting to lose weight, which only left me feeling dizzy and exhausted. When nutrient supply is suddenly cut off, the body enters 'survival mode,' drastically lowering the basal metabolic rate to conserve energy—this is the primary cause of the yo-yo effect.
In Traditional Korean Medicine (TKM), we view this not as a lack of willpower, but as a problem of internal 'waste accumulation' and 'functional decline.' Please review the following checklist to assess your condition:
✓ Extreme drowsiness and heaviness after meals $
ightarrow$ This may indicate an accumulation of Dam-eum (痰飮), abnormal fluid waste stagnating in the body.
✓ Shortness of breath with minimal movement and poor circulation $
ightarrow$ There is a high possibility that Eo-hyeol (瘀血), or blood stasis, is hindering your metabolism.
✓ Weak digestion and lack of energy, making dietary control difficult $
ightarrow$ This suggests a state of Bi-heo (脾虛), or Spleen Deficiency, leading to decreased metabolic efficiency.
Ultimately, to prevent the yo-yo effect, you must first repair your body's 'engine' (metabolic function). Rather than indiscriminate fasting, you need a process that simultaneously clears stagnant waste and replenishes deficient Qi. Only then will your body feel secure and maintain a stable weight. I recommend visiting a clinic to check your specific constitution together.