The right framing is weight is often a lever, not weight is the only lever. If you want an official, no drama overview of what causes sleep apnea (including how body structure and weight can play a role), the National Heart, Lung, and Blood Institute (NIH) has a good primer: 3) Where GLP-1 medications enter the conversation What GLP-1 means here (high level) GLP-1 (glucagon-like peptide-1) is a hormone involved in appetite regulation, digestion, and blood sugar
Molecular links between endocrine, nervous and immune system during chronic stress
It is important to understand that there is no official, direct pharmacological link between tirzepatide and menstrual cycle disruption listed in the Summary of Product Characteristics (SmPC) approved by the Medicines and Healthcare products Regulatory Agency (MHRA)
[ref] Carnitine: The study on mice showing that carnitine transport is essential for GLP-1 RA effectiveness indicates that low carnitine levels may impair weight loss.[ref] More studies are needed, but it may be that adding supplemental carnitine could help, especially if you have genetic variants related to lower carnitine levels