Associate Professor of Family Medicine @UOttawa/Exclusively obesity medicine since 2004/Bylines spanning from The Lancet to the NYTs/הנניhttps://bsky.app/profile/yonifreedhoff.bsky.socialhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3mw72sequ7s2rMy latest for @medscape.com discusses the use of GLP1 in children with obesity and how some have decided that even if it works, it's bad. It's a remarkable position given the challenges and risks obesity confers to children's qualities of life and health given the drug's efficacy /123 Sep 2026 15:32 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mw72sequ7s2rhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3mupnvxkgw22gA two-fer this week from me on @Medscape. My latest looks at the rise of stigma vs. the use of GLP1s and the perception that they are a "quick-fix". While that stigma definitely exists, rather than worsening over time, I'm betting the rise of GLP1 use will herald /104 Sep 2026 19:06 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mupnvxkgw22ghttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3mukkvjz4z22vMy latest for @medscape.com . What if teen exposure to GLP1 related weight TikTok content is healthier than teen exposure to pre-GLP1 extreme & nonsensical dieting content? Sure would be nice to have some actual evidence, but my bet is, current stuff is less harmful. https://www.medscape.com/viewarticle/glp-1-social-media-content-really-harming-teens-2026a1000tga?src=02 Sep 2026 18:29 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mukkvjz4z22vhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3msy5vv26xs2xMy latest for @medscape.com asks if it's wise to publish idealized guidelines for the use of GLP-1 meds rather than basic guidelines with an explanation covering what a more idealized prescription support program would look like? /113 Aug 2026 17:23 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3msy5vv26xs2xhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3msfzdyjysc22My latest for @null where I ask what are the ethics of conducting or publishing research on behavior-only weight-loss interventions for patients with obesity when we’ve had dozens of years of research that have come to the same basic conclusions /106 Aug 2026 12:14 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3msfzdyjysc22https://bsky.app/profile/yonifreedhoff.bsky.social/post/3mse5yxymjc2fDecided I'm going to write an add-on for my book for the GLP1 era. Just as with dieting, so much misinformation around GLP1s and this addition very much inline with book's overarching aim to mythbust and to make ending traumatic dieting that much more doable. Hope to have available by January05 Aug 2026 18:32 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mse5yxymjc2fhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3mpyymvp6ss2cHad a nice chat with @caitlinschiller about my now vintage book The Diet Fix. Book holds up imo, but needs a chapter on permission to use GLP1s and mythbusting around them. The title btw wasn't my choice. Mine was, "A Prescription for Chocolate: The End of Traumatic Dieting". Can have a listen here: https://simplify-show.beehiiv.com/p/eat-chocolate-and-enjoy-life-a-practical-diet-framework06 Jul 2026 21:06 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mpyymvp6ss2chttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3mog4ca7wgc27My latest on @medscape.com on how even the insurance plans designed by and for physicians rarely cover GLP1 medications for obesity and the hypocrisy and short-sightedness therein. There's a backstory too. Had originally submitted as an opinion piece for @cmaj.ca /116 Jun 2026 15:26 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mog4ca7wgc27https://bsky.app/profile/yonifreedhoff.bsky.social/post/3mo3xselmzc2qMy latest in @medscape.com on how obesity is finally, truly, a choice. But no, not the choice of trying harder, but rather of therapeutics, where even our current generation of medications and surgeries, if accessible and affordable to all, would push 90% of obesity into remission12 Jun 2026 14:39 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mo3xselmzc2qhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3mksbdhhxec27My latest in @medscape.com: Seems that one by one the fear mongered risks about GLP1s get disproven. No increased suicide risk, no thyroid cancer risk, no blindness risk. But the loudest these days is muscle loss risk. Well guess what? No meaningful risk there either https://www.medscape.com/viewarticle/no-need-worry-about-glp-1-induced-muscle-loss-2026a1000dr201 May 2026 13:47 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mksbdhhxec27https://bsky.app/profile/yonifreedhoff.bsky.social/post/3mhql2w4p3c25My latest for @medscape.com covers how the diet era is already dead, it just doesn't know it yet and why that's glorious https://www.medscape.com/viewarticle/bell-tolls-diet-era-2026a10007jq23 Mar 2026 17:20 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3mhql2w4p3c25https://bsky.app/profile/yonifreedhoff.bsky.social/post/3me2b3n6ut22zMy latest on @medscape.com covers some thoughts on the new American Dietary Guidelines and why they actually matter a great deal even if it's true that virtually no one consciously follows or cares about them https://www.medscape.com/viewarticle/why-diet-guidelines-matter-even-if-zero-people-follow-them-2026a10002s604 Feb 2026 16:08 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3me2b3n6ut22zhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3maqvp4thos2lMy latest on @Medscape - can you successfully sue your employer for GLP1 coverage? Though plaintiffs have already tried and failed, two new developments have made a new potential case much, much stronger https://www.medscape.com/viewarticle/two-new-developments-may-help-future-plaintiffs-compel-glp-1-2025a1000z6124 Dec 2025 18:34 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3maqvp4thos2lhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3m7o44gux4c23My latest in @medscape.com covers two recently published studies. The first claimed black coffee would prevent cancer. The second, and hold onto your hats, that whole body vibration treatments don't help with weight loss10 Dec 2025 22:26 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3m7o44gux4c23https://bsky.app/profile/yonifreedhoff.bsky.social/post/3m5ohgzpnfs2tMy latest on @medscape.com on how declining obesity rates are now almost certainly attributable to GLP-1 medications, but how new guidelines meant to be wiser than BMI in its diagnosis are apparently diagnosing 70% of the population with obesity https://www.medscape.com/viewarticle/were-curing-obesity-far-more-people-apparently-have-it-2025a1000v9w15 Nov 2025 14:58 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3m5ohgzpnfs2thttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3m4ivgn3ja22aYesterday, @standwithus.bsky.social Canada posted the podcast that Montreal's Dr. Lior Bibas and I recorded about antisemitism and antizionism in medicine in Canada. Among the topics, what legal liability has the CPSO exposed themselves to by not acting? https://www.youtube.com/watch?v=StMKFJ2NNGc&t=2s31 Oct 2025 16:27 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3m4ivgn3ja22ahttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3m2pbrjjcnc23My review of @juliabelluz.bsky.social and @kevinh-phd.bsky.social's new book Food Intelligence finally published on @medscape.com. tl;dr? If you're looking for a detailing of our current understanding of the science of food, eating, and metabolism, this one's for you https://www.medscape.com/viewarticle/what-we-know-and-dont-know-about-nutrition-and-health-2025a1000qfa08 Oct 2025 18:34 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3m2pbrjjcnc23https://bsky.app/profile/yonifreedhoff.bsky.social/post/3lwuns5ynpk2xMy latest in @medscape.com on GLP1 meds and suicide: Did you hear GLP1 meds might increase the risk of suicide? I'd bet you did. It was all over the news consequent to just 3 case reports submitted by Iceland to the European Medicine Association who announced an investigation /121 Aug 2025 00:12 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lwuns5ynpk2xhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lt5cldwpms2gYou might remember my blog on how Lilly effectively levied a fat tax on obesity whereby they were charging more for tirzepatide prescribed for obesity than for diabetes in 🇨🇦. Well they've cancelled that and launched a financial assistance program for Zepbound https://open.substack.com/pub/yonifreedhoffmd/p/lilly-cancels-its-tirzepatide-fat?r=lpiej&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true04 Jul 2025 13:04 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lt5cldwpms2ghttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lt3amnp4nk2nDo front-of-package food warnings change behaviour? Do they increase stigma vs. obesity? How about if the warnings don't reference obesity at all but simply, as they should, reference nutrients? My latest for @medscape.com explores new research that found /103 Jul 2025 17:24 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lt3amnp4nk2nhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lsgs65j5fk25Good news for Canadians looking to start Zepbound (tirzepatide) for obesity. Lilly will be introducing a program to help defray costs. Medication should be on shelves mid summer. I'll blog about this in more detail but wanted to briefly mention25 Jun 2025 14:12 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lsgs65j5fk25https://bsky.app/profile/yonifreedhoff.bsky.social/post/3ls4hcs2nhc2nJust read a rare piece that rather than demonize weight loss drugs, instead highlighted the use of Wegovy in teens by emphasizing the teens' joy for the benefits the drug provided them with /121 Jun 2025 11:31 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3ls4hcs2nhc2nhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lrgkrx3yok2cMy latest for @Medscape asking why, despite robust evidence demonstrating sustained weight loss significantly decreases both cancer incidence and recurrence that both patient and doctor facing literature on same nearly never mention it? /112 Jun 2025 18:34 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lrgkrx3yok2chttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lqbdrljte22lI had a small role to play in this @dougmanuel.bsky.social led publication which hopefully will help to pave the way for the development of a multinational, multidisciplinary evaluation framework for public health environmental surveillance (including wastewater) https://journals.plos.org/plosone/article?id=10.1371/journal.pone.031034228 May 2025 23:21 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lqbdrljte22lhttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lpw74rcc4227Don't hold breath [contains quote post or other embedded content]24 May 2025 12:58 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lpw74rcc4227https://bsky.app/profile/yonifreedhoff.bsky.social/post/3lpmsphgekc2eMy latest in @medscape.com - remember that recent ginormous The Lancet paper that among other things was highly critical of the use of BMI to diagnose obesity that instead recommended either the use of BMI along with a secondary marker of excess adiposity /120 May 2025 19:22 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lpmsphgekc2ehttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3lou6lgrudk2tHer name is Leah, and I am her father (as promised - father/daughter tattoos for getting into her University of choice)11 May 2025 00:18 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3lou6lgrudk2thttps://bsky.app/profile/yonifreedhoff.bsky.social/post/3looagl544k2oIt seems it's now official. Lilly has effectively levied a fat tax on Canadian prescriptions of its diabetes and obesity medication tirzepatide (aka Mounjaro/Zepbound) whereby if prescribed for obesity, you'll pay nearly double what you'd pay if prescribed for diabetes. More in my Substack https://open.substack.com/pub/yonifreedhoffmd/p/despite-assurances-to-the-contrary?r=lpiej&utm_campaign=post&utm_medium=web&showWelcomeOnShare=false08 May 2025 15:35 +0000at://did:plc:zlybfu2f2sz3ej2p2e6ke376/app.bsky.feed.post/3looagl544k2o