Kecel-Gunduza, S., Kocb, E., Bicaka, B., Kokcub, Y., Ozela, A
Signs your body is burning fat include a gradual reduction in body measurements (especially waist circumference), clothes fitting more loosely, increased energy throughout the day, improved sleep quality, less bloating, and a more defined body shape
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Additionally, researchers have observed interactions with the dopaminergic and serotonergic systems in neurological models, suggesting broad signaling pathway engagement
Occupancy stays low, but each engaged receptor keeps sending its main message longer than it would under a balanced signal (cAMP bias with low receptor internalization). In a head-to-head trial against liraglutide, tirzepatide reduced measured food intake and craving more despite lower GLP-1 occupancy. The effect lowers the drive to eat rather than increasing restraint
Post-discontinuation: Many users reported ongoing benefits after stopping