Bone health advice has changed a lot over the years.
First it was calcium. Then magnesium, then vitamin D, and then vitamin K, vitamin C, zinc and a list that kept growing.
Then we heard that weight-bearing exercise was the answer.
Yet for many of us, our diet, our exercise and the time we spend in the sun didn’t change much around menopause. So why does bone density drop so quickly then?
Because something else did change: our hormones. Estrogen drops sharply at menopause, and estrogen helps protect bone by slowing the cells that break old bone down. So the focus shifted to estrogen.
Estrogen doesn’t explain all of it, though. Bone loss often starts years earlier, while estrogen still looks normal on a lab test. To see why, it helps to start with how bone is built.
How bone is built and broken down
Bone is living tissue. Your body is always taking old bone apart and building new bone in its place. Researchers estimate that most of the adult skeleton is replaced about every ten years.
Two types of cells do this work. Osteoclasts clear away old bone. Osteoblasts are the builders that lay down new bone in its place.
Like any builder, osteoblasts need materials. Protein forms the framework. Calcium and magnesium harden it, and zinc helps the builders do their work. Vitamin D helps you absorb calcium, vitamin K helps bind it into bone, and vitamin C helps make collagen, the protein that gives bone its flexibility. Without the builders and the materials, new bone can’t be made.
When clearing and building happen at the same pace, bone density holds steady. Hormones help set that pace. When hormones shift around menopause, clearing can speed up while building slows down. Bone is then lost faster than it’s replaced.
That also means bone responds to what you do. A system that’s always being rebuilt can be supported.
Which hormones affect bone health?
Just as calcium was never the only nutrient bone needs, estrogen isn’t the only hormone involved. Several work together to set the pace of building and clearing:
- Estrogen slows the cells that clear old bone and supports the builders.1
- Progesterone supports the builders.2
- Testosterone helps preserve both bone and muscle.3
- Thyroid hormone influences how quickly bone is cleared and rebuilt.4
- Melatonin, best known for sleep, helps set the daily rhythm of bone rebuilding.5
- Cortisol, your main stress hormone, works the other way. Higher cortisol has been linked with lower bone density in early postmenopausal women.6
And there’s one more hormone many of us only connect with fertility, which researchers are finding may matter a great deal for bone: FSH.
What is FSH?
FSH stands for follicle-stimulating hormone. Your pituitary, a gland about the size of a pea at the base of your brain, releases it to tell your ovaries to mature a follicle, the fluid-filled sac that holds an egg. That’s where the name comes from.
Your brain doesn’t send the same amount every cycle. Your ovaries signal back about how things are going, and your pituitary adjusts its next request based on what it hears. That exchange runs throughout your reproductive life.
As you move through your forties, your ovaries respond less readily to the same request, and your pituitary compensates by asking louder. That’s why FSH goes up. Because it was measured for decades as a fertility marker, FSH came to be understood almost entirely in terms of the ovaries.
But men make FSH too, and they have no follicles. Receptors that respond to FSH have also been found well beyond the ovaries, including on the cells that clear away old bone.
I’m one of the co-authors of a 73-page review published August 31, 2026, in the Journal of Clinical Medicine: Is Follicle-Stimulating Hormone (FSH) Misnamed? Rethinking Its Role in Menopause as a Systemic Regulator of Bone, Brain, Metabolism, and Aging. Read the published paper if you love science, the full paper is worth your time. For everyone else, I’ve translated the bone and support sections into plain language below, along with what I’ve seen in my own practice.
Can bone loss start before menopause?
Yes. Bone loss speeds up during perimenopause, years before your final period.7
For years, the bone conversation has centered on postmenopause, and women were told not to worry until then. We already encourage girls and young women to build the strongest bones they can through their twenties. The years between then and postmenopause deserve the same attention, especially perimenopause, when research suggests hormone shifts affect bone more than we once thought.
What’s surprising is that bone loss often speeds up before estrogen has dropped. During perimenopause, estrogen rises and falls unpredictably, and in the years before the final period it can even run higher than usual.8 So a lab test can show estrogen in the normal range while your bone is already changing.
FSH, meanwhile, has been climbing for years. It has been described as beginning to rise roughly six to ten years before a woman’s final period.9,10 For some women, the rise starts in the late reproductive years, before perimenopause has begun
How does FSH affect bone? What the research shows
Three findings stand out.
- The cells that clear away old bone can respond to FSH. Receptors for FSH have been found on these cells, but not on the builders.11
- FSH tracked with bone loss more closely than estrogen did. In the Study of Women’s Health Across the Nation (SWAN), a large study following women through midlife, each doubling of FSH was linked to a 39% greater risk of significant bone loss in the lower spine. Each halving of estrogen was linked to a 10% greater risk.12
- The link is strongest during the transition itself. It largely fades about two years after the final period.13
Researchers don’t yet know whether FSH directly affects bone or simply rises alongside the other changes happening at the same time. The pattern is consistent enough that it’s worth knowing about now.
“One of the biggest misconceptions in bone health is that we wait until menopause to become concerned about bone loss. As I’ve been discussing for years, the emerging FSH literature suggests the skeleton may be signaling increased vulnerability years earlier, creating an opportunity to identify risk and intervene before substantial bone loss has occurred.” Douglas Lucas, DO · The OsteoCollective
Why perimenopause is the time to pay attention to your bones
You can’t feel bone loss. It doesn’t hurt, and there’s usually no sign until a bone breaks. That’s why most women don’t hear about their bones until later.
Your bones are at their strongest around age 30. After that, the goal is to keep what you’ve built. And the years around menopause are when bone changes fastest, which makes perimenopause one of the best times to protect it.14
If you’re still having periods, rising FSH can be an early heads-up, and there’s still time to act. Once you’re about two years past your final period, the link between FSH and bone loss becomes much weaker, but what you do for your bones still matters. The habits you build now keep paying off for years.
What can an FSH test tell you about your bones?
If you already have an FSH result in your patient portal from a panel someone ordered, this section is for you.
FSH is measured with an ordinary blood test and is often run alongside estrogen. It moves a lot. It shifts across your cycle and, during perimenopause, even within a single cycle. Two researchers have called it the “fluctuating severely hormone.”15 One result is a snapshot of something still in motion.
Lab ranges also vary, and there’s no established ideal number for each stage of life. One result can’t tell you what’s happening in your bones, and it isn’t a number to hit or bring down. FSH tells you more when you look at its direction over time, alongside your cycles, your symptoms and the rest of your health.
FSH can also understate risk. Women with low body weight are more likely to lose bone through menopause, yet their FSH can stay lower than expected.16.17
Other factors matter no matter what your FSH shows. These include a parent who broke a hip, smoking, long-term steroid use, an overactive thyroid, low vitamin D and ongoing high stress.18 For some women, inherited differences in how the body uses vitamin D also play a part.19
If you’d like to talk this through with your practitioner, these questions are a good place to start:
- Do I have earlier FSH results we could compare this one against?
- Given my family history and risk factors, should we be watching my bones now?
- What else would you want to see alongside FSH to get a fuller picture?
A bone density (DEXA) scan measures how dense your bone is, which helps estimate fracture risk. It doesn’t show everything, like bone’s structure and flexibility. Guidelines set out who should be screened and when, and your practitioner can tell you where you fall.
What can you do to protect your bones through menopause?
The things that support your bones also support the system that regulates your hormones. So it helps to start there.
Your hormones don’t act alone. They’re messages carried through your endocrine system, a body-wide network of glands and tissues that make hormones, respond to them and adjust based on feedback. It includes the glands you’d expect, like your pituitary, thyroid, adrenal glands and ovaries. It also includes tissues you might never think of as hormonal. Your bone, muscle and fat send and receive hormone signals too.
That’s why hormone balance was never meant to be a fixed level. Hormones rise and fall across the day and across your life, and a healthy endocrine system is one that can sense change and respond to it. Rising FSH is one example. Your ovaries send back less signal, so your brain sends a stronger one.
Your endocrine system does that work best under the right conditions. Sleep, nutrition, movement and stress all shape how clearly your hormones communicate, and each one is something you can influence. To see how this network works, and everything it has already carried you through, read How your body regulates its own hormones: the endocrine system, explained.
For your bones, it comes down to two things: giving the builders their materials, and supporting the system that sets their pace. The same habits do both, before and after menopause.
Start with protein and strength
If you take one thing from this article, make it this: eat enough protein and give your bones regular work to do.
Protein makes up roughly half of bone by volume and forms the framework the builders work on. Higher protein intake has been linked with higher bone density in older women.20 About 1 to 1.2 grams of protein per kilogram of body weight a day is commonly recommended for bone health.21
Strength training and impact exercise put your bones under load, and load is the signal that tells the builders to keep bone strong.22 Done consistently, these two habits do more than everything else done occasionally.
Give the builders all their materials
Calcium matters, and it works alongside magnesium, zinc and vitamins C, D and K. Women need about 1,000 mg of calcium a day in perimenopause and 1,200 mg after menopause.23 Food can usually cover that, and food is preferred over supplements unless you're low. More isn't automatically better, so estimate what you get from food before adding a supplement.
That applies to vitamin D too. In a three-year randomized trial, healthy adults taking 4,000 or 10,000 IU a day ended up with slightly lower bone density than those taking 400 IU, and no gain in bone strength.24 Correcting a true deficiency is worth doing. Taking large doses on the assumption that more helps is not.
Eating patterns that support healthy inflammatory balance, like the Mediterranean diet with its vegetables, fruit, legumes, whole grains and extra virgin olive oil, have also been linked with healthier bones.25,26
Move in ways you’ll keep doing
Strength training and impact work get the most attention, and they deserve it. Walking, Pilates, tai chi, qigong and yoga also help.27,28 The movement you’ll still be doing in March beats the ideal one you abandon in February.
Manage stress
Cortisol that stays high over time has been linked with faster bone loss.29 Lowering ongoing stress is one way to protect your bones.
Protect your sleep
Growth hormone peaks in deep sleep, and melatonin helps set the daily rhythm of bone rebuilding.5
Know what hormone therapy can do
Estrogen-containing hormone therapy has clearly shown bone density benefits at an adequate dose and duration. Those gains fade once it’s stopped. Whether it’s right for you depends on your history, your risk profile and your goals, and that’s a decision to make with a clinician who knows all three. Anyone who tells you the answer is obvious in either direction isn’t accounting for you.
Consider botanical support
Some women choose to support their endocrine system with botanicals. Femmenessence® nourishes the system that regulates your hormones, and it's been shown in published clinical trials to have statistically significant effects on hormone levels.
One of those trials also looked at bone. Over four months, women in the placebo group showed the expected decline in bone density associated with postmenopause, while women taking Femmenessence® experienced an increase, along with a 44% improvement in T-score.30 This was a small cohort, so it points the direction for further research rather than settling the question.
Common questions about FSH and bone loss
Can bone loss start before menopause?
Yes. Bone loss speeds up during perimenopause, often while periods are still fairly regular. By the time estrogen has dropped enough to get attention, meaningful bone change may already have happened.
Does a high FSH level mean I’m losing bone?
Not necessarily. One FSH result is a snapshot of a hormone that swings a lot in perimenopause. Rising FSH has been consistently linked with bone density changes across large groups of women, which is different from predicting what’s happening in your own body.
What does FSH have to do with bone?
Receptors that respond to FSH have been found on the cells that clear away old bone, but not on the cells that build new bone. Researchers are still working out whether FSH affects bone directly or as part of a wider hormonal shift.
Would I feel it if I were losing bone?
No. Bone loss causes no symptoms until a fracture. That’s why it’s usually found late, and why an early signal is worth having.
Am I already behind?
Probably not. If you’re still having periods, you’re early, and that’s the reason to pay attention now. The years around menopause are when bone changes fastest, and when support can make the biggest difference.
How can I protect my bones during perimenopause?
Eat enough protein and do regular strength or impact exercise. Get a full range of bone-building nutrients from food, manage stress and protect your sleep. Talk with your practitioner about your risk factors and whether hormone therapy fits your situation.
Is it too late if I’m already postmenopausal?
No. About two years after your final period, FSH becomes a much weaker signal for bone loss, but everything that supports bone still matters, and the postmenopausal years have their own well-established approaches.
Does hormone therapy help bone?
Yes. At an adequate dose and duration, it has shown bone density benefits. The benefit fades after it’s stopped. It’s one option among several and worth discussing with a clinician who knows your full history.
Where to go next
- How your body regulates its own hormones: the endocrine system, explained
- Read the full review, Is Follicle-Stimulating Hormone (FSH) Misnamed?, led by Dr. Deanna Minich
About the author
Dr. Douglas Lucas, DO, is a double board-certified orthopedic surgeon and longevity physician, and the founder of The OsteoCollective. After years in traditional orthopedic practice, he shifted his focus from repair to prevention, working from the premise that bone health is not a geriatric diagnosis but a biomarker of longevity and resilience. He is the host of The Dr. Doug Show: Bones, Hormones & Healthspan and a co-author of the FSH review.
Medically reviewed by
Dr. Deanna Minich, PhD, MS, CNS, FMCP, FACN, Chief Science Officer at Symphony Natural Health and lead author of the FSH review. A nutrition scientist and educator with more than 25 years across academia and the supplement industry, she is a recipient of the 2025 Linus and Ava Helen Pauling Award and the author of more than 50 scientific publications.
Emily Hernandez, MS, CNS, Science and Medical Team consultant at Symphony Natural Health. A board-certified nutrition specialist with a master's in nutrition education from American University, she practices functional and integrative nutrition with a clinical focus on hormonal health and healthy aging, and has presented her research at scientific conferences.
