This echoes the findings of a 2013 review, which found neither firm evidence in favor of this hypothesis nor evidence strong enough to rule out any such increased risk. Recent research also points to a link between the GLP-1 receptor agonist semaglutide and worsening diabetic retinopathy (DR)
Another well-researched form is acetyl-L-carnitine, which delivers additional support for your brain and nervous system in addition to its energy benefits
J Neurosci 33:1582715836
TRIUMPH-1: the pivotal obesity trial (May 2026) TRIUMPH-1 is the trial that will underpin any obesity licence application
Additionally, GLP-1 agonists suppress glucagon release , a hormone that raises blood sugar, and act on areas of the brain involved in appetite regulation
As Allure previously reported, a group of 14 peptides that were previously banned under the Biden administration came up for debate in early 2026, in part due to their increasing popularity, and how quickly and relatively easy they became to procure online, where they are often purchased on what is called the gray market. Despite the fact that these peptides were restricted, and thus technically should not be sold, theres a loophole that has made them available for purchase