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What nobody told me was causing the shedding on Mounjaro Nobody told me that GLP-1s do something to a hormone that controls your hair follicles. Not my doctor. Not the Mounjaro support line. Not any of the Facebook groups I'd been in for a— Year. More than a year. Fourteen months of shedding and protein shakes and Nutrafol capsules I gagged on every injection morning, and not a single person told me I was treating the wrong problem. I found out by accident at midnight reading something I almost scrolled past. Let me tell you what fourteen months on a GLP-1 looks like from the hair perspective, since apparently nobody briefs you on this beforehand. Month one through four: great. Hair is fine. Weight is dropping. Life is good. You think you got lucky and you're not going to be one of the shedding people. Month five: you start noticing a little more in the brush. You tell yourself it's normal seasonal shedding. Month seven: it's not seasonal shedding. You wrap your ponytail and you need an extra loop of the elastic and you stand there holding it for a second before you get it together and go about your day. Month nine: your hairdresser asks if you've been under stress. You say yes because the real answer is complicated. Month eleven: you've bought Nutrafol, you've hit your protein targets, you've added a biotin gummy, you've tried the prenatal vitamin thing that people keep recommending, and none of it has done anything you can actually see. You're blow-drying your hair in a specific direction every morning to hide the part. You've been doing this for three months and you've told no one. Month fourteen: you're reading something online at midnight and you finally get an explanation that makes sense of the whole thing. And you feel frustrated and relieved at the same time because it turns out you were treating the wrong problem the entire time. This is the explanation. Your body makes a hormone called DHT. It's made from testosterone, and it's the hormone in charge of your hair follicle cycle — when follicles grow, how long they stay in the growth phase, when they switch over to the shedding phase and rest. DHT is basically the foreman. When you lose weight fast — the way you lose it on GLP-1 medications — your DHT levels get disrupted. The rapid drop in body fat changes how your body produces and processes hormones. Your follicles get the wrong signal. They leave the growth phase early. They pile into the shedding phase. And they stay there, waiting for a signal to come back that never comes, because the DHT levels are still off. That's the actual mechanism of GLP-1 hair loss. Not just nutritional gaps — though those are real too, because your appetite suppression means you're eating less and absorbing less and your follicles are short on building materials on top of everything else. It's both things happening at once. Biotin addresses neither of them. It's a B vitamin. It helps if you have a B7 deficiency, which you probably don't. The Nutrafol — nutrition focused, not hormone focused. The protein — helps with the building material piece, but can't fix the DHT signal that's telling your follicles to keep shedding. I'm not saying those things are bad. I'm saying they couldn't have worked for my specific type of hair loss because they weren't aimed at my specific problem. The reason nothing was working wasn't that I wasn't trying hard enough. It was that nothing I tried addressed the DHT piece. I found something that does. Saw Palmetto — blocks the enzyme that converts testosterone into excess DHT. There are clinical studies. Not vague studies. Studies showing 38% reduction in DHT levels in eight weeks. Pearl Powder on top of that to rebuild the actual follicle structure with amino acids. And Aloe Vera to help everything absorb properly, which matters when your GLP-1 is still suppressing your appetite and your digestion is doing its best but it's not at full capacity. I almost didn't try it. I want to be upfront about that. After five failed attempts I was not exactly itching to spend money on another supplement. I read the ingredient list three times. I looked up the mechanism. I specifically looked for the DHT piece because that was the thing I'd never seen addressed anywhere else. It was there. That's what made me decide to try it. Weeks one through four: I was watching but not seeing much. Which I'd expected. Week five: less in the drain. Maybe. I kept second-guessing myself. Week eight: not second-guessing anymore. Definite improvement. Not back to normal. But the direction had reversed. Week twelve: my hairdresser stopped mid-trim and asked what I'd changed. She said my hair looked thicker. She wasn't trying to be nice. She sounded genuinely confused, like she'd noticed something she hadn't expected to notice. That was three months ago. My ponytail wraps three times again. My husband said last week that I seem like myself. I don't think he knows why. He would probably be embarrassed that I'm posting this, actually. But I've had too many conversations with women in the same position I was in to just keep this to myself. If you're taking protein and biotin and waiting for your doctor's timeline and it's been longer than that timeline — there's a reason. You're not doing it wrong. You might just be solving the wrong problem. Here's where I found it.