Insights
The evidence behind the vial
This is where our research write-ups, study breakdowns and practical guides live, so you can check the reasoning before you buy.
FeaturedStudy
Tirzepatide and retatrutide: what the trials show
Two of the biggest numbers in obesity research came out of the same lab. Here is how the phase trials compare, and what the figures actually mean.
02 Jul 2026 / 1 min read
Study
Tirzepatide and retatrutide: what the trials show
Two of the biggest numbers in obesity research came out of the same lab. Here is how the phase trials compare, and what the figures actually mean.
02 Jul 2026 / 1 min read
Study
How much of GLP-1 weight loss is muscle
Body composition substudies from the semaglutide and tirzepatide trials put lean mass loss at roughly 25 to 40 percent of total weight lost. What that figure means depends heavily on what it is being compared to.
27 May 2026 / 4 min read