For the first time in years, I had plans.
Not vague someday plans. Real ones. My husband and I had booked ten days in Italy for the fall, Florence, the Cinque Terre, the kind of trip where you walk nine miles a day on cobblestone streets and eat dinner standing up at a counter and don't think twice about it. I had bought new shoes for it. I had a list.
Eighteen months on Ozempic. Forty-one pounds gone. Knees that worked again. A body I recognized in the mirror for the first time since my late forties. I had spent years in a kind of low-level war with myself, the diets, the regain, the shame, the next diet, watching my world quietly get smaller. The trips I didn't book because I didn't know if I could keep up. The photos I avoided. The way I had started doing a silent physical inventory before agreeing to anything, how far is the walk, how many stairs, could I manage it without showing the effort. This medication ended all of that. For the first time in a decade I was just living, not managing.
I finally felt like myself. I don't want to lose that.
What I didn't know yet, what nobody on this medication seemed to know, was that the very thing giving me my life back was quietly working against something I couldn't see, couldn't feel, and wouldn't understand for another week.
The hair I had noticed. It was in the drain, in my brush, in the way my ponytail had gotten thinner over the winter. My endocrinologist said it was normal, the body reallocating resources during rapid loss. I filed that away.
The face I had noticed too. Different in photos. Not bad, exactly. Just different. Older in a way I hadn't quite expected. I filed that away.
The fatigue. The dragging afternoon heaviness I kept pushing through, telling myself it was just the cost of this finally working. I told myself I'd deal with it later.
I was losing weight. I was proud of it. I had a trip to Italy booked. But somewhere underneath the pride, a question had been forming that I wasn't ready to answer yet.
Am I trading one problem for another?
Karen's call turned that question into something I couldn't file away anymore.
She'd been in my book club for eleven years. Sixty-one years old. Sharp, funny, the kind of woman who remembers everyone's birthdays and still sends actual cards in the mail. The kind of woman you look at and think: she has it together.
She'd had it together.
Eighteen months earlier, Karen had started Wegovy. Her doctor suggested it after her blood pressure crept up and her knees had been aching for two years from the weight she'd been carrying since her mid-fifties. She was skeptical at first, she'd heard the stories, the nausea, the cost, the people who said it was the easy way out.
But within three months the scale was finally moving in the right direction. She lost forty-seven pounds over the course of a year.
She glowed.
She posted a photo at Christmas. Standing in her living room in a red dress she hadn't fit into since her daughter's wedding. Arms around her grandkids. Big smile. I liked that photo. I remember thinking: good for Karen. She did the hard thing and it paid off.
That was the last photo she posted for a long time.
She was at her daughter's house on a Saturday morning in February. Her granddaughter, three years old, obsessed with building towers out of blocks and immediately knocking them down, was on the living room floor. Karen walked over and leaned down to scoop her up. One fluid motion. The way you do it without thinking, the way she'd done it a hundred times before.
She heard a crack.
Not a pop. Not a snap. A crack. Low and definitive. The kind of sound that makes a room go very quiet.
She didn't fall. She didn't drop the child. She straightened up slowly and stood completely still, her granddaughter pressed against her chest, not yet knowing exactly what had happened, only that something had. Her daughter was already crossing the room. Karen couldn't speak for a moment. She just stood there, holding the child, waiting for the pain to tell her how bad it was.
A compression fracture in her lower spine. A vertebra that had given way under the weight of bending forward to lift thirty pounds. She wasn't off-balance. She wasn't carrying anything heavy. She bent down to pick up her granddaughter, and her spine fractured.
She spent three days in the hospital. The first two weeks she couldn't drive herself anywhere. For six weeks she couldn't lift anything heavier than a coffee cup.
Her granddaughter couldn't understand why Nana kept saying not right now, come sit with me, let's read a book. She's three. She doesn't understand braces or compression fractures or why the woman who used to swing her around the garden now flinches when she runs toward her with her arms out.
That's the part I keep thinking about. Not the fracture. Not the hospital. The moment when a three-year-old runs at you with her arms out and you have to brace instead of catching her.
I didn't understand any of it yet. Not the why. Not what was already running in me while I sat on my kitchen floor with the phone in my hand.
She called me from the hospital because she knew I'd been on Ozempic for six months. I had lost twenty-two pounds. I was proud of it. I had a trip to Italy booked.
When she told me what the orthopedic surgeon had said, sitting in that hospital room, still in the brace, I sat down on my kitchen floor and stayed there.
The hair I could see. The face I could see. The fatigue I could feel. But this had been happening silently the entire time, and nobody whose job it was to know had said a word.
I thought about the shoes I'd bought for Florence. The cobblestone streets. The nine miles a day. I thought about Karen in the red dress at Christmas and Karen in the brace in February, and the distance between those two moments being exactly nothing. A Saturday morning and one fluid motion.
The surgeon told Karen something her prescribing doctor had never mentioned. That her gynecologist had never mentioned. That no one in a single appointment over eighteen months had said out loud.
He told her that what happened to her spine was not a random event. It was connected to the weight loss.
It was right there on the drug's own prescribing label. The medical system managing her weight had the information. The weight loss appointments and the bone health appointments exist in separate rooms, and nobody is standing in the hallway connecting them. Nobody was watching the bones while everybody was watching the scale.
I am not going to tell you to stop the medication. The weight loss is real. What you are doing is working. The plans you have made for this body, the trips, the grandchildren, the version of yourself you've been building, those plans are real. They are worth protecting. But there is a trade-off that nobody in your prescribing appointments is connecting. And the reason nobody catches it is that you feel fine. That is exactly the problem.
The first few days were mostly noise.
I found articles about calcium. About vitamin D. About weight-bearing exercise. The same things my annual physical checkbox had been ticking off for years. None of it explained Karen. None of it explained why a woman who had been doing everything right for eighteen months could fracture her spine lifting a child.
Then I found the FDA label. The actual Wegovy prescribing document. And I found the number that made me close my laptop and sit very still.
I had injected that drug into my stomach every week for eighteen months. I had been proud of it. I had told Karen about it and sent her a before photo and thought: good for me.
But the stat still didn't explain why. It didn't explain why a woman who had been taking calcium every day, doing everything right for eighteen months, could still fracture her spine bending down to lift a child. That was the question I couldn't find an answer to.
I kept reading.
It turns out NASA had known about this problem for decades. They had been studying it since the 1970s, not because of supplements or bone health, but because of astronauts.
In zero gravity, astronauts lose one to two percent of their bone density every single month. Not because they're sick. Not because they're doing anything wrong. Simply because there is no load pressing down on the skeleton.
No weight. No signal. No rebuilding.
It's basic physics. Your body is smart. It doesn't maintain what it isn't using. When the load disappears, the signal to keep building bone gets quieter, and the bone starts to go.
What nobody told Karen, what nobody told any of us, is that on GLP-1 it is far more severe.
When you lose forty-seven pounds in a year that rapidly, your body isn't used to it. It's likely the first time it's happened, and your body doesn't know exactly what's going on, it just starts breaking down bone at an alarming rate.
Inside your bone, there's a honeycomb of tiny struts, thousands of them, holding the whole structure together.
When the rebuilding side shuts down, the breakdown doesn't even notice.
It keeps going full speed.
So you're losing bone every day and replacing none of it.
Those struts start snapping.
And once a strut is gone, there's nothing left to rebuild on.
It's permanent.
There's no surface left to build on.
The window where it matters is right now.
I sat with that for a while. I had lost forty-one pounds.
But I kept hitting a wall. None of it explained why the body couldn't simply recover once the weight stabilized. None of it explained why Karen's bones had kept losing ground even though she had been doing everything her doctors told her to do. Every answer I found pointed back to calcium.
Take more. Eat more dairy. As if calcium was what Karen had been missing.
I was reading about a problem I couldn't solve with the solutions I was being given. That was the most frightening thing I found that week. Not the fracture risk. The fact that the only answers anyone was offering were the ones that had already failed.
There was one more thing I needed to find. I just didn't know what it was yet.
I left a message for my endocrinologist. I told her I'd been doing a lot of reading that week and I had a specific question, about why the fracture risk was this high, about what was happening inside the bone that calcium and exercise weren't touching, about the piece I kept finding references to but couldn't locate an answer for.
She called me back the next morning. "There's a researcher you should read," she said. "She's been writing about why GLP-1 patients are losing bone at this rate, the piece that the weight loss world and the bone health world have both been missing. I don't agree with everything she concludes but she's asking the right questions. Her name is Dr. Rachel Kim." She spelled it out.
I wrote it down. I searched it that night.
The title of the article stopped me before I had even clicked.
"I've Treated Hundreds of Women on GLP-1 Medications. Here's What I Wasn't Telling Them About Their Bones, And Why I Can't Stay Quiet Anymore."
— Dr. Rachel Kim, MD — Endocrinology & Metabolic Bone DiseaseDr. Rachel Kim had spent fifteen years in academic medicine as an endocrinologist specializing in metabolic bone disease. She ran one of the only combined obesity and osteoporosis clinics in the country, treating the same women for bone loss in one appointment while watching them lose weight on GLP-1 medications in another. For two years she had been watching the numbers from both sides of her practice without saying anything publicly.
When GLP-1 prescriptions exploded she started pulling her patients' DEXA scans more frequently. What she found troubled her enough to call their prescribing doctors. In most cases, the prescribers had no idea about the patient's bone history. Same woman. Two doctors. Different rooms. Nobody standing in the hallway connecting them.
Three weeks after one of those calls, her patient came back in a compression fracture brace.
She wrote the article that night.
I read it in one sitting. I read it the way you read something that keeps connecting to things you already know, with a rising sense that the pieces you had been picking up all week were arranging themselves into something you were not ready to see.
Nobody in the weight loss world was reading bone marrow research. Nobody in the bone health world was tracking GLP-1 patients. Dr. Kim was standing where both problems met. She was the only one looking at both datasets at the same time.
Inside your bone marrow, there are cells called stem cells. Every day, they face a decision.
Stem cells require energy to decide what to become. So when you're healthy, they mostly become builders. Old bone out. New bone in.
But rapid weight loss and caloric restriction put a lot of stress on your body. Especially after menopause.
And what happens is that the very thing that chooses whether your cells become fat or bone builders... fades away.
Bone-building cells rely on high amounts of energy from a specific molecule called NAD+. Think of NAD+ as the signal that tells those stem cells which way to go.
Your marrow literally fills up with fat where builders should be. The more fat fills in, the less bone is made. And the less bone is made, the weaker your skeleton becomes.
The scary thing is that NAD+ levels drop by roughly half between the ages of 40 and 60. Menopause accelerates that drop.
And then, the piece I had been missing all week, the restricted eating that drives weight loss on these medications depletes it further.
Dr. Kim's article included one line that I had to put down and walk away from before I could finish reading.
"The fatigue these women have been pushing through every afternoon, the exhaustion they chalk up to the medication, is not a side effect. It is depletion from the stress of severe caloric restriction. The same depletion is redirecting their bone marrow stem cells. They can feel it in their energy. They cannot feel it in their bones. Not until something breaks."
— Dr. Rachel KimI sat with that for a very long time.
The fatigue I had been filing away under the medication's name. The dragging afternoon heaviness I kept pushing through, telling myself it was just the cost of this finally working. The fatigue that was there every single day, that I had told myself I'd deal with later.
That was the same depletion. The same process running in my energy and in my bones simultaneously. I had been feeling one. I had not been able to feel the other.
Not until a Saturday morning when she bends down.
The pill goes in. There are no builder cells left to use it. It's not a supply problem. It's like delivering groceries to a kitchen with no chefs. The ingredients sit there. Nothing gets made. You can flood the system with calcium and nothing changes, because the problem was never what the bones were made of. It was the signal telling the body to make them at all.
Dr. Kim knew she had found the problem. What she didn't have yet was a solution.
She had looked. Nothing existed.
There was nothing that addressed what she was seeing, not the raw material side, not calcium, not vitamin D, but the signal itself. The part that determines whether the bone marrow is producing builders or fat cells.
The GLP-1 supplement market was selling protein shakes and multivitamins. The bone health market was selling different types of calcium. Nobody had even looked at where these two problems overlapped.
So she decided it was her responsibility to solve it.
She started with the foundational question: how do you restore the signal? How do you get NAD+ back to the levels needed to shift stem cells back toward builders?
She studied the research. Tested different forms, different doses. The answer, based on the evidence, was 500mg per day — the amount needed to maintain meaningful levels in women under the dual stress of menopause and caloric restriction. But NAD+ alone wasn't enough.
The stem cells needed the signal to be amplified — something to turn up the volume and actively direct them toward becoming builders rather than fat cells. That led her to resveratrol. Specifically 75mg twice daily — the exact dosage used in the RESHAW clinical trial, which found measurable improvement in spinal bone density and a 7.24% reduction in bone breakdown markers. Without that dosage, the results didn't hold.
The third piece was clearing the environment. With age and rapid weight loss, some cells in the bone marrow stop working entirely. They become what researchers call zombie cells — broken, not dividing, not building, but sitting there leaking inflammation that pushes every surrounding cell toward fat instead of builders. She found that quercetin could clear them out selectively, without damaging healthy cells. Once they were gone, the remaining builders could actually do their job.
When she had the formula finalized, she priced it out at clinical levels. It wasn't cheap, running somewhere between $150 and $300 a month to produce at the dosages the research required.
She tested it anyway. Quietly, with her own patients — the ones who had been on GLP-1 medications for a year or more, postmenopausal, exactly the population she had been watching. She ran it for months. She measured everything.
That was when she decided to bring it to market.
She wasn't interested in building a supplement company. She found a small Canadian company called Thirmik that already operated a manufacturing facility in Denver, Colorado — people who believed in the mission and were willing to work on her terms. She approached them with the formula already built.
- US manufacturing — produced in Denver, Colorado
- Third-party batch testing for purity and potency on every run
- A ninety-day guarantee she personally insisted on
- She holds no equity and earns nothing on product sales
She said she was not interested in building a supplement business. She was interested in solving a problem nobody had solved, and she needed a manufacturer who could execute it to her standards.
The product was called Thryve.
"This is not a bone supplement. It is not calcium with a new label. I spent eight months looking for something that addressed the problem I was watching in my patients. I couldn't find it. So I built it. The marrow environment shifts from a fat-filled space back toward a bone-building one, before the structural struts that hold everything together are gone for good."
— Dr. Rachel Kim
I had lost forty-one pounds. I had been eating far less than my body was accustomed to for eighteen months. I was on the other side of menopause.
I understood, for the first time, why Karen had fractured her spine on a Saturday morning in February bending down to pick up a child. Not a fall. Not an accident. A body that had been quietly losing ground from three directions at once, with nobody in the hallway connecting them.
And I understood that my body had been doing the same thing.
I ordered that night.
I want to say something about the cost, because I know it was one of the things I kept circling back to on those three nights at the laptop.
I had spent over a thousand dollars on Ozempic in the last eighteen months. I had spent years before that on diets and programs and a very expensive piece of exercise equipment that became a very expensive clothes rack. I had paid for this win with time and discipline and eighteen months of saying no and meaning it. Protecting that investment — making sure the structure underneath the life I was rebuilding was sound enough to support it — was the most financially rational thing in the entire chain.
Dr. Kim had written about Thirmik's margins at the end of her article. They make almost nothing on a first order — after premium US-sourced ingredients, manufacturing to the highest quality standards, third-party batch testing, and payment processing fees, the margin per bottle is barely enough to cover the transaction.
The business model only works if the product works. Women who get results come back. Women who don't, don't. A company that profits only from repeat customers has exactly one incentive: to make something that actually does what it says. That is a different business model from everything else in this market.
I still didn't know if my bones were actually losing ground or if I had caught this in time. That question would take months to answer. But I had done everything I could do tonight.
Check Thryve Availability → 90-day guarantee, if you don't feel the difference in your energy and movement, you pay nothingI started Thryve five months ago. I am still on Ozempic.
The first two weeks I felt nothing. I had half-expected that, I had told myself I would give it thirty days before deciding, but the nothing still sat there every afternoon like a quiet verdict. On day eleven I almost sent it back.
Day twelve was different. Not dramatically. The fatigue I'd been pushing through every afternoon was still there, but it was one layer lighter. I noticed it because I didn't reach for coffee at three o'clock. I sat there waiting to want it and then realized I didn't. It is a strange thing to notice something by its absence. I almost missed it.
By week five I was sleeping through the night without the low-grade restlessness that had been waking me up since I'd started the medication. I did not connect this to Thryve immediately. I thought maybe it was the season changing. I thought maybe I was just adjusting. I did not want to give it credit too fast and then have to take it back.
Week eight was when my husband noticed. We were walking back from dinner, a longer route than we'd normally take, uphill at the end. I wasn't calculating it the way I used to. I wasn't measuring my energy against the distance. I was just walking.
"You're moving differently," he said. "Like you stopped being careful."
He was right. I had been tiptoeing through my own life without fully realizing it. Measuring every physical effort against some invisible reserve I was afraid of depleting. That calculation had gotten quieter. I hadn't noticed it happening because it happened the same way the fatigue had gotten lighter, gradually, by subtraction, noticed only when it was already partly gone.
The Italy trip had been booked since January. I had not let myself think too carefully about whether I could actually do it. Nine miles a day. Cobblestones, bridges, staircases. I had done the math on what it would look like if I had to slow down, sit out, send my husband ahead. I had imagined it more than once. The specific humiliation of the woman who finally got well enough to go and then couldn't keep up.
I did not say any of this out loud. I just booked it and tried not to think about it.
There was a version of this story where I found Dr. Kim's article and then didn't order for another month. Where I told myself I'd look into it more, think about it more, find more evidence first. I know that version. I almost lived it. Every month I had waited was another month of the wrong cells being produced, another month of struts thinning without anything to stop them. The window I had been inside was closing the entire time I was deciding.
Month three was when I understood what I was actually protecting.
We did Italy. Florence first, then the coast. Nine miles on the first day. Cobblestones, bridges, staircases, the kind of uneven ground that you can't fully plan for. I carried my own bag. I didn't calculate the distance. I didn't spend the evenings icing anything or lying in the hotel room running the numbers on whether I'd overdone it.
I walked through those streets like someone who trusted her own body.
I cannot tell you what my DEXA scan will show, it is scheduled for next spring, the first one I have ever asked for myself rather than waited to be referred. My endocrinologist said she was glad I'd initiated the conversation. She said most of her patients on GLP-1 medications hadn't brought it up and she wasn't in the habit of raising it at weight management appointments.
That is the gap. That is exactly the gap.
What I can tell you is that I stopped doing the math. The calculation that used to run in the background of every physical decision, how far is it, how much energy do I have, what happens if I overdo it, that calculation is quieter now. Not gone entirely. Just no longer the first thing. For a woman who spent eighteen months losing weight specifically so she could live differently, that is not a small thing. That is the whole thing.
The weight loss is real. I am keeping it. And I am showing up for the plans I made for this body.
I finally feel like myself. I intend to keep it that way.
Karen walked her daughter's dog last week for the first time since February. Slow, flat ground, her daughter beside her. She called me after. She said it felt strange to do something ordinary again without calculating it first.
Karen held her granddaughter last month. Sitting in a chair, the child climbing into her lap. Not scooping her up from the floor. Not swinging her around. Just sitting, arms open, the child coming to her, and that being enough for now.
She said it felt like getting a small piece of herself back.
I thought about that for a long time after we got off the phone. A small piece. Not herself. A piece. Because the rest is still being rebuilt, slowly, month by month, in a marrow environment that finally has what it needs to do the job.
She said she thinks about the women on the same medication she was on, feeling as good as she felt twelve months ago, making their own lists, booking their own trips, and she wants them to know what she didn't.
The weight loss is working. Your bones are keeping score.
The window is closing. Every month the signal goes unaddressed is another month of stem cells defaulting to fat instead of builders. Inside your bone, the honeycomb of tiny structural struts continues thinning. Once a strut snaps, there is no surface left to rebuild on. No supplement on earth can put it back. The women who protect their bones are not lucky. They are the ones who understood what the win cost and made sure nothing took it back quietly. The time to act is before the fracture, not after it. The window is open right now. It will not stay open.
- NAD+, restores the signal your bone marrow runs on
- Resveratrol at RESHAW trial dosage (75mg 2×/day)
- Quercetin, clears broken zombie cells blocking the builders
- Not calcium. Not vitamin D. The part they miss.
If you are on Ozempic, Wegovy, Mounjaro, or any GLP-1 medication, or if the active loss phase is behind you and you've been assuming the risk went with it, here is what I want you to do.
- Ask your endocrinologist for a DEXA scan. If you are seeing a GP, ask for a referral. If you are postmenopausal and have been on the medication for more than six months, you are in the window where this matters. Your prescribing doctor will not raise it, you have to. Your endocrinologist may not be familiar with the specific mechanism, most aren't, which is precisely what Dr. Kim was writing about. The DEXA scan request is the part she will understand and support without hesitation. Don't wait for the scan result to start protecting. Start now and bring the scan in as confirmation of what you already did.
- Understand that bone loss is silent. Losing weight and losing bone can happen at the same time with nothing to feel. You will feel fine. You will feel better than fine. The hair and the face you can see. This you cannot, not until something breaks.
- Understand that the risk does not stop when the active loss does. The signal that tells your bone marrow what to produce, and that the caloric restriction depleted during your loss phase, does not correct itself automatically in maintenance. Inside your bone, the tiny structural struts are continuing to degrade every month the signal stays compromised. Once a strut snaps, there is no surface left to build on. It is permanent.
- Address the signal, not just the minerals. You made plans for this body. The trip. The grandchildren. The version of yourself you have been building toward for two years. Thryve is what protects the structure those plans depend on. Dr. Kim built it because nothing else existed for this population. You found it the same way I did, by asking the right question and not stopping until you found an answer that held.
The woman who does nothing keeps the weight. She keeps the scale win and the before-and-after and the red dress. And somewhere in the next two years, on an ordinary morning doing an ordinary thing, she finds out what she lost while nobody was watching.
Every month without addressing the signal is another month of the wrong cells being produced. Another month of struts thinning. The window where the scaffolding can still be protected is not a metaphor, it is a biological timeline, and it is running right now, while you are reading this, while you are deciding.
You did the hard thing. You paid the price, the injections, the restricted eating, the months of discipline, the fatigue you pushed through every afternoon without knowing what it was costing you underneath. You paid for this life. You earned the version of yourself who books the trip and makes the list and finally doesn't calculate the risk before walking through a door.
You already paid for this. You have a list.
She walks those cobblestone streets without calculating the risk.
She bends down without bracing.
She opens her arms when her granddaughter runs at her.
That is what you are protecting. And it is still protectable. Right now.
Start Thryve Today → 90-day guarantee, feel the difference or pay nothing · Ships within 3–5 daysThese statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary. Consult your healthcare provider before beginning any new supplement, especially if you are currently taking prescription medications including GLP-1 receptor agonists.