The first study demonstrating GLPs boost metabolism was just released.
TLDR:
White fat doesn't use calories.
Brown fat uses calories continuously
putting out heat.
We know "fast metabolizers", a disproportionately thin group, have significantly more brown fat than the general population.
This early data seems to confirm what was already observed in mice. White visceral abdominal fat is converted to brown metabolically active fat when GLPs are used for an extended period. This increases resting energy consumption.
A superior alternative to Clen, in my opinion, if you use a GLP long term.
My interpretation, for whatever it's worth.
When the body "senses" low calorie availability, it reduces resting metabolism in order to conserve energy.
When the body "senses" calories are abundant for a long period it increases the volume of Brown Adipose Tissue (BAT) to keep organs warm, increasing metabolism.
GLP hormones are the signal that you've consumed calories, produced after eating. By using exogenous GLPs, you're sending a continuous "calorie abundance" signal and conversion of "dead" visceral fat to "active" brown fat conversion is maximized.