Kirsty Woods
3.5K posts

Kirsty Woods
@MetabolicEP
Passionate Exercise physiologist and pracademic focusing on metabolic health for Obesity, PCOS, NAFLD, Alzheimer's & Diabetes. ~Open yet critical mindset~




Eating the same meals on repeat was associated with 40% greater weight loss.









DXA substudies show most GLP-1s lose lean mass at roughly the same ratio as calorie restriction alone. Tirzepatide: 26%. Diet-only benchmark: ~25%. Semaglutide is the outlier at 35-40% depending on the dataset. GLP-1s produce more total weight loss, so absolute lean loss is higher. But the proportion is largely the same. Note: DXA "lean mass" includes water and organ tissue, not just muscle. All trials included lifestyle counseling but none required resistance training or set protein targets. A case series of patients who added lifting and prioritized protein saw dramatically less lean loss, with two of three actually gaining lean mass. Heymsfield 2014 | Wilding NEJM 2021 | Look et al. 2025 | Tinsley & Nadolsky 2025

I definitely believe the lipid-based view is overhyped. This study is telling (in females): pubmed.ncbi.nlm.nih.gov/33471027/. I've attached the main figure here. The evidence is surprising--both at how irrelevant the lipid markers appear to be and how strong the metabolic markers are. ApoB and other lipid markers may matter, but diabetes and metabolic status appears to matter much more. ApoB appeared to carry a two-fold risk, while diabetes carried a 10X risk.























