Menopause and Bone Loss: What's Happening and What You Can Do About It

You can't feel bone loss happening. You can feel a hot flash. You notice when you're not sleeping well. You may even notice changes in your muscles and how your body responds to exercise.

Your bones are different. Bone loss happens quietly, which is one reason it can be easy to ignore until a bone density scan shows osteopenia or osteoporosis, or until you have a fracture. And menopause is an especially important time to pay attention.

Bone loss accelerates around the menopause transition, often before your final menstrual period. The good news is that there is a lot you can do to protect your bones. The first step is understanding when bone loss happens, whether you're at increased risk, and what you can actually do about it.

Why Does Menopause Affect Your Bones?

Your bones are living tissue. Throughout your life, old bone is constantly being removed and replaced with new bone. Two types of cells do most of this work. Osteoclasts break down old bone, while osteoblasts build new bone. When you're younger, these processes are generally balanced.

Estrogen helps regulate this process. As estrogen becomes lower and more variable during the menopause transition, bone resorption increases, so you begin losing bone faster than you replace it. Estrogen is an important part of the story, although age and other hormonal and biological changes also contribute.

When Does Bone Loss Happen During Menopause?

Most of us don't think much about bone density in our 20s and 30s. That's when we're building toward our peak bone mass. After that, bone density is influenced by genetics, body size, nutrition, physical activity, hormones, medications, medical conditions, and aging.

Around menopause, bone loss speeds up considerably. The most rapid loss occurs during the menopause transition, beginning before your final menstrual period and continuing for the first few years after it. Bone loss then slows again, although it continues at a slower rate as you age. That's why you shouldn't wait until you're officially postmenopausal to start paying attention.

Who Is More Likely to Lose Bone?

There isn't one number or one characteristic that tells us whether you're going to develop osteoporosis or experience a debilitating fracture. Some of your risk comes from things you can't change, including your age, genetics, family history, and the amount of bone you built when you were younger. Other risk factors are ones we can actually do something about. Body composition, nutrition, and weight stability all play a role, as does your weight relative to your height. Behavior matters too: smoking, high alcohol intake, and low physical activity all increase bone loss or fracture risk, along with early menopause or primary ovarian insufficiency (POI), certain medications such as long-term glucocorticoids, and medical conditions that affect bone or interfere with nutrient absorption.

When Weight Loss and Menopause Overlap

This is becoming an increasingly important conversation.

Menopause is already a time when it becomes harder to maintain muscle, and bone loss accelerates around the menopause transition. At the same time, many women are trying to lose weight, sometimes with the help of a GLP-1 medication.

GLP-1 medications can be very effective when they're medically appropriate. But significant weight loss can include some loss of lean mass, and eating substantially less can make it harder to get enough protein, calcium, vitamin D, and other nutrients. Put those together with the hormonal changes of menopause, and you've got a situation where losing both muscle and bone deserves some attention.

The effects of GLP-1 medications on bone are still uncertain, but we are starting to get more data. Some studies suggest that people taking GLP-1 medications may lose more bone density or be more likely to receive a diagnosis of osteoporosis. We still have a lot to learn about how much of this is related to the medication itself, the amount and speed of weight loss, changes in muscle mass, nutrition, or the underlying health of the people taking these medications. Importantly, we also can't predict whether those changes in bone translate into more fractures in everyday clinical practice: studies of fracture risk have reported mixed results, with some showing similar or lower risk and others showing higher risk in particular groups.

Bottom line: If you're losing a significant amount of weight during menopause, protecting your bones should be part of the plan. Make sure you're getting adequate protein and other nutrients, keep resistance training in the picture, and include weight-bearing activity.

If you're considering or taking a GLP-1 medication, see GLP-1s and Menopause: Separating Evidence from Hype for a more detailed discussion of the benefits, limitations, and menopause-specific considerations.

Do I Need a Bone Density Scan?

The primary test we use to measure bone density is a DXA scan, sometimes called a DEXA. It measures bone mineral density, usually at the hip and spine.

Your result is reported as a "T-score". The T-score is a measurement of bone density compared to a healthy young adult of the same sex:

• -1.0 or higher: normal bone density

• Between -1.0 and -2.5: osteopenia

• -2.5 or lower: osteoporosis

  
  

But your T-score is only one piece of the picture. Bone density and fracture risk are related, but they aren't the same thing. Age, previous fractures, medications, medical conditions, and other factors can affect your actual risk of breaking a bone.

When should you have a DXA?

In the United States, the U.S. Preventive Services Task Force recommends women begin screening at age 65. For postmenopausal women younger than 65, the recommendation is to assess risk first and then screen women whose risk is increased. Some women will need a DXA well before 65. Others can reasonably wait. The point of risk assessment is figuring out which group you're in rather than defaulting to either extreme.

If you have risk factors for osteoporosis, including low body weight defined as BMI less than 20 kg/m², family history of osteoporosis, experienced early menopause, are taking a medication or have a medical condition that affects bone, or have a history of a fracture from a fall from standing height or less, your clinician may recommend evaluating your bone health earlier. A fracture like this can indicate increased fracture risk even when your T-score isn't in the osteoporosis range.

FRAX is one tool that we use to determine when to treat bone loss. FRAX estimates your 10-year probability of having a major osteoporotic fracture or hip fracture. It combines information about your age, weight, medical history, fracture history, and other risk factors to estimate your 10-year probability of having a major fracture. It can also incorporate your DXA result when one is available.

I Have Osteopenia. What Does That Mean?

This is one of the most common things I hear after a DXA: "But I exercise. I eat well. I've been healthy my whole life. How can I have osteopenia?" And honestly, I understand why you're frustrated.

We sometimes think of health as a report card. If you've exercised for years, eaten a good diet, maintained a healthy weight, and done all the things you're supposed to do, shouldn't your bones be normal? Unfortunately, biology doesn't work quite that neatly.

Your bone density reflects much more than the choices you've made in the last few years. Genetics, the amount of bone you built when you were younger, your body size, your hormonal history, medications, medical conditions, and aging all play a role.

But your lifestyle still matters. Exercise, adequate nutrition, and the other things we know support bone health can help you maintain the bone you have and reduce your fracture risk. They just can't guarantee a particular number on a DXA.

Osteopenia also doesn't mean that your fracture risk is necessarily low. In fact, many fragility fractures occur in women whose bone density is in the osteopenia range rather than the osteoporosis range. That's partly because osteopenia is much more common than osteoporosis, but it also underscores why we look at your overall fracture risk rather than the T-score alone.

If you've been doing everything "right" and you're disappointed to see osteopenia on your report, don't think of it as a failure. But don't dismiss it either. This is useful information. Now is the time to pay attention, make changes if changes are needed, and do what you can to protect your bones going forward.

What Can I Do to Protect My Bones?

Many of the things that protect your bones are also good for your muscles, cardiovascular health, and ability to stay active as you age.

Exercise

Resistance training is one of the most important things you can do. When you challenge your muscles, you're also giving your bones a reason to maintain their strength.

If you're already lifting weights, keep going. If you're primarily a cyclist, swimmer, or doing another activity that doesn't put much load through your skeleton, adding resistance training becomes especially important.

Weight-bearing activities such as hiking, jogging, dancing, and climbing stairs provide additional skeletal loading. And don't forget balance. A strong skeleton matters, but preventing a fall matters too.

Calcium and vitamin D

Calcium is important for bone. For women over 50, the usual target is about 1,200 mg of calcium a day from food and supplements combined. I generally prefer getting as much as possible from food and using a supplement to make up the difference if needed. Dairy products, calcium-fortified plant milks, tofu made with calcium, canned fish with edible bones, and some leafy greens can all contribute.

Vitamin D is a little trickier. I see plenty of women who spend a lot of time outdoors and assume they must be getting enough from the sun. But especially if you live in a colder climate, wear sunscreen, or simply don't have much skin exposed, you may not be making very much vitamin D from sunlight. And you can have a diet that includes plenty of milk, yogurt, and cheese and still have a low vitamin D level.

If you have risk factors for low vitamin D, or you're concerned about your bone health, it's reasonable to check your level rather than assume you're getting enough. If your level is low, supplementation may be needed to bring it into an adequate range.

You don't need to take megadoses of either nutrient, and supplements aren't a substitute for osteoporosis treatment when treatment is indicated.

The other basics matter too

Smoking and excessive alcohol both work against your bones, same as they do everywhere else in your health. And if you're losing weight intentionally, keep protein and resistance training in the mix rather than letting the scale be your only measure of success. Preserving muscle and maintaining adequate nutrition must be part of protecting your long-term health.

Does MHT Protect Your Bones?

Yes. Estrogen slows the accelerated bone loss that occurs around menopause, and menopausal hormone therapy (MHT) reduces the risk of osteoporotic fractures. MHT is FDA-approved for the prevention of postmenopausal osteoporosis. For women who are younger than 60 or within 10 years of menopause who have no contraindications, MHT can be an especially useful option when they are also looking for treatment of bothersome menopause symptoms.

It's also worth knowing that more estrogen isn't necessarily better for your bones. A study comparing four doses of transdermal estradiol found that relatively low doses can prevent bone loss, with little additional bone benefit from higher doses. The goal isn't to use the highest estrogen dose possible for your bones. The right dose is the one that appropriately treats your symptoms and meets your individual treatment goals.

If you're having hot flashes, night sweats, or sleep disruption and you're also concerned about bone loss, that overlap can make the decision easier. But even without symptoms, a woman with significant risk factors for bone loss can have a conversation about whether MHT makes sense for her.

If you already have significant osteoporosis or a high fracture risk, there are medications that may be more appropriate depending on your individual risk.

One other thing is important to understand. The bone benefit of MHT doesn't continue after you stop taking it. Bone loss generally resumes after discontinuation. You can still stop MHT when it's right for you, but bone health should be part of that conversation.

What If I Have Osteoporosis?

If your DXA shows osteoporosis, or you've had a fracture from a minor fall, lifestyle measures remain important but are likely not enough on their own.

There are several effective medication approaches for osteoporosis, including medications that slow bone breakdown and medications that stimulate new bone formation. The right choice depends on your fracture risk, medical history, other medications, and kidney function, among others.

Bisphosphonates slow the breakdown of bone and are among the most commonly used treatments for osteoporosis. Treatment is generally reassessed in 3 to 5 years. Women who remain at high risk may continue treatment, while those whose risk has fallen to low or moderate can take a planned "bisphosphonate holiday." Because these medications remain in the skeleton after treatment stops, their effects can persist during the break. Bone density and fracture risk will be monitored, and treatment can be restarted if needed.

Denosumab is another antiresorptive medication that slows bone breakdown and is given as an injection every six months. Unlike bisphosphonates, its effects wear off relatively quickly if treatment is stopped. It should be given on schedule, and you should not simply stop it or take a drug holiday without a plan for follow-on treatment because bone loss and fracture risk can increase rapidly.

Bone-building medications, otherwise known as "anabolics," stimulate new bone formation and are generally reserved for women at particularly high or very high fracture risk. Examples include teriparatide, abaloparatide, and romosozumab. They all can be very effective, but they aren't appropriate for everyone and have important contraindications that need to be considered.

What About "Natural" Bone-Building Supplements?

The internet is full of products promising to "rebuild your bones naturally" or reverse osteoporosis without medication. Be skeptical of those claims.

Collagen peptides, strontium products, and various herbal supplements have been studied to varying degrees, but they don't have the evidence base of approved osteoporosis medications for preventing fractures. Strontium is a particular concern because it can make a DXA scan look better without necessarily representing stronger bone.

I would much rather see you spend your time and money on an evidence-based plan than on a supplement marketed as a natural alternative to treatment.

What Should I Do Now?

Where you start depends on where you are.

If you're in perimenopause or early postmenopause and haven't thought much about your bones yet, start with understanding your risk. You may not need a DXA yet, but you should know what factors would make screening appropriate.

If you've already had a DXA showing osteopenia, don't stop at the label. Ask what your overall fracture risk looks like and whether there are things you should change or monitor.

If you're taking or considering a GLP-1 medication and you're losing a significant amount of weight, make resistance training, adequate protein, and good overall nutrition part of the plan. If you already have risk factors for osteoporosis, ask whether a DXA is appropriate.

If you've had a fracture from a fall from a minor fall, talk with your clinician now rather than waiting for your next routine visit.

And if you already have osteoporosis, know that there are effective treatments.

You can't feel your bones getting weaker. That's exactly why paying attention before you have a fracture matters.