To lose weight you have to burn more energy than you ingest - fact. However, although CICO always applies (law of physics), it tells us nothing about why you are burning x amount of energy. It is much more complicated than simply eating less cals. (thread)
Under-recognized causes of weight loss difficulty:
hormonal imbalances/changes, i.e. PCOS, menopause, low estrogen, low T in men, etc.
hypothyroidism
meds
stress (
cortisol,
insulin resistance,
inflammation, etc.)














