Adaptive thermogenesis
Adaptive thermogenesis is the drop in energy expenditure, beyond what a smaller body would explain, that a prolonged deficit tends to produce, the body's way of spending less when less comes in. IZeat estimates no expenditure and therefore no adaptation; what it can show is that intake stayed where the customer set it while progress slowed, which is the fact a conversation about adaptation starts from.
Adaptation is measured in labs and inferred at home from a plateau that arrives while the food record says nothing changed. That inference needs the record to be complete, which is the part IZeat is built for; the record then rules out the usual suspect, unlogged food, before anyone blames the body. What to do next, a break, a slower pace, is the customer's and their assistant's.
The word is often reached for too early, when the honest explanation is a record with holes: three unlogged weekend days a week explain a stall better than any physiology. IZeat's period summary shows the holes, which makes the conversation more honest in both directions. When the record is full and the stall is real, the customer has a fact to bring to someone qualified.
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