Release the Editor’s Digest for freeRoula Khalaf, Editor of the FT, selects her favorite tales on this weekly publication.The co-founder of Regeneron has warned that blockbuster weight-loss medicine may reason “extra hurt than excellent” except the speedy muscle loss related to the therapies is solved, as the United States biotech pushes forward with trials of muscle-preserving medications. Medical research counsel that sufferers handled with the brand new elegance of weight- loss medicine, referred to as GLP-1s, lose muscle at some distance sooner charges than other people reducing weight from nutrition or workout, exposing them to well being issues, stated George Yancopoulos, who additionally serves as Regeneron’s leader medical officer. For the 2 in each 5 sufferers who discontinue the therapies inside of a 12 months, consistent with a 2024 JAMA learn about, which means that they’re prone to rebound to their unique weight with much less muscle and a better frame fats proportion, “including insult to damage”, stated Yancopoulos. “I do assume that the GLPs must be considered with numerous fear when it comes to the way in which they’re if truth be told being utilized in the actual international,” stated Yancopoulos. “They may well be resulting in successive adjustments in frame composition which may be developing extra hurt than excellent in the longer term.”Regeneron is amongst a rising listing of drugmakers researching experimental medicine to keep lean muscles together with GLP-1 medicine as a path right into a doubtlessly $130bn-a-year marketplace this is ruled by means of Ozempic and Wegovy maker Novo Nordisk and Eli Lilly, the corporate in the back of Mounjaro and Zepbound. Regeneron, a $111bn biotech that specialises in antibody therapies, is checking out a drug known as trevogrumab, which blocks the hormone myostatin, which limits muscle enlargement, together with Wegovy in mid-stage trials. There are 11 myostatin medicine in biotech pipelines, of which seven are being investigated for weight problems, consistent with business tracker Citeline. Closing 12 months, Eli Lilly purchased Boston-based biotech Versanis in a deal price $1.9bn to get its fingers on its muscle-preserving remedy to enrich its weight-loss medicine. BioAge, a biotech with a muscle-regeneration drug this is partnered with Eli Lilly, indexed closing month and its percentage value is up 21 according to cent. Medical knowledge presentations that 25 according to cent of weight reduction from Eli Lilly’s shot resulted from a discount in lean frame mass, together with muscle, whilst 40 according to cent of Novo Nordisk’s jab was once because of a drop in lean frame mass. America Meals and Drug Management advises that the medication be utilized in mixture with nutrition and workout. Novo Nordisk stated scientific knowledge “[does] now not point out an affiliation of better lean frame mass loss over fats mass loss with semaglutide remedy”. Eli Lilly didn’t in an instant reply to a request for remark. Really usefulThe primary scientific knowledge from Regeneron’s phase-two trial of trevogrumab is predicted midway thru subsequent 12 months. Regeneron may be bearing in mind whether or not to advance a per month GLP-1 injection to scientific trials, which it has examined in mice. In spite of his considerations concerning the drug, Yancopoulos stated Regeneron was once “fascinated by turning into avid gamers within the GLPs”. “I’m now not positive that the GLPs are in reality the actual ultimate solution right here, as a result of they might have important long-term issues,” he added. “All of us need to have 10 extra kilos of muscle, 10 much less fats, however shall we consume no matter we wish — that’s the best international,” stated Yancopoulos. “We don’t all need to be nauseous and unwell and dropping muscle. I do assume that . . . a perfect long run is one the place we reach a greater, more fit means of preventing again towards metabolic illness.”