If you or someone you care for has been told they have osteopenia or osteoporosis, you’re not alone. Osteoporotic fractures affect roughly one in two women and one in five men over age 50 (1). The good news is that nutrition, exercise, gut health, and smart medical decisions can all make a meaningful difference. This post walks through what the evidence actually says, aiming for clarity, but without oversimplification.

What’s Actually Happening in Your Bones

Bone isn’t a static structure. It’s living tissue in a constant state of remodeling: specialized cells called osteoblasts build new bone, while osteoclasts break old bone down. In a healthy skeleton, these two processes stay in balance. In osteoporosis, resorption outpaces formation, and bones become more fragile and fracture-prone.

What many people don’t realize is that this balance is influenced by far more than calcium intake. Hormones, inflammation, gut bacteria, physical activity, sleep, and even stress all play a role. Let’s look at each of these.

Calcium and Vitamin D: Important, but Not Magic Bullets

Calcium and vitamin D are the foundation of bone health recommendations, and for good reason. Calcium is the primary mineral in bone, and vitamin D is essential for absorbing it. Guidelines recommend 1,000 mg of calcium daily for most adults, increasing to 1,200 mg for women over 50 and men over 70, with 600–800 IU of vitamin D daily (2)(3).

There is nuance, too. A large systematic review of 33 randomized controlled trials with over 51,000 participants found that calcium and vitamin D supplementation alone, in people not selected for osteoporosis, did not significantly reduce hip fracture risk (2). Other meta-analyses in higher-risk populations have shown modest benefit. One found a 16–39% reduction in hip fracture risk with combined calcium and vitamin D (4). These nutrients matter most as part of a comprehensive strategy, and dietary sources are preferred over supplements when possible, since excessive calcium supplementation has been linked to kidney stones and possibly cardiovascular events (2)(3).

Good food sources of calcium include sardines and canned salmon (with bones), yogurt, hard cheeses, bok choy, collard greens, and fortified plant milks. For vitamin D, think fatty fish, egg yolks, fortified beverages, and sensible sun exposure.

Vitamin K2: A Nutrient Worth Knowing About

Vitamin K2 (menaquinone) activates osteocalcin, a protein that helps bind calcium into bone. A 2022 meta-analysis of 16 randomized controlled trials found that vitamin K2 supplementation significantly improved lumbar spine bone mineral density (5). When it comes to fractures, the overall analysis didn’t reach statistical significance, but after removing one heterogeneous study, a significant reduction in fracture incidence was observed (5)(6). A three-year trial of low-dose MK-7 (180 micrograms daily) in healthy postmenopausal women showed that it significantly decreased the age-related decline in bone mineral density and bone strength at the lumbar spine and femoral neck (7).

Most of the research has been conducted in Japanese populations, so generalizability to other groups is still being studied (6). The richest dietary source of K2 is natto (fermented soybeans), followed by aged cheeses like Gouda and Brie, egg yolks, and dark poultry meat.

One important caution: if you take warfarin (Coumadin), talk to your prescriber before increasing vitamin K2 intake,.

Magnesium, Protein, and the Supporting Cast

Magnesium plays a role in bone crystal formation and influences parathyroid hormone and vitamin D metabolism. While deficiency may negatively affect bone health, evidence that supplementation alone improves bone density is still limited.

Protein is essential for bone matrix formation and muscle strength. It’s both critical for preventing fractures. A number of studies indicate that fracture risk may be lower with higher dietary protein intake, provided calcium supply is sufficient (1). Aim for balanced protein intake throughout the day from diverse sources.

Plant compounds, including bioflavonoids and polyphenols, also deserve mention. Prunes are among the most studied for bone benefits. Soy foods, blueberries, pomegranate, and green tea all contain compounds with antioxidant and anti-inflammatory properties that may support bone health.

Exercise: One of the Most Powerful Tools

If there’s one non-drug intervention with strong evidence for bone health, it’s specific forms of exercise.

A 2023 meta-analysis of 80 studies involving over 5,500 postmenopausal women confirmed that exercise produces significant improvements in bone mineral density at the lumbar spine, femoral neck, and total hip (8). A network meta-analysis found that combined aerobic and resistance exercise had the strongest effect on both lumbar spine and femoral neck bone density (9). The LIFTMOR trial demonstrated that even high-intensity resistance and impact training in postmenopausal women with osteopenia improved lumbar spine and femoral neck BMD without increasing fracture risk (10).

The most effective programs combine:

• Resistance training (2–3 sessions per week targeting major muscle groups)
• Weight-bearing impact exercise (walking, jogging, stair climbing, jumping exercises)
• Balance training (heel raises, single-leg stands, tai chi) to reduce fall risk

For those with diagnosed osteoporosis, safety matters: avoid heavy forward bending under load and high-impact twisting. Start progressively and, if you’ve had vertebral fractures, work with a physical therapist.

The Gut-Bone Axis: A Frontier in Bone Science

One of the most exciting areas of bone research is the gut-bone axis, the concept that the trillions of bacteria living in your gut directly influence your skeleton (11)(12)(13).

Here’s how it works: gut bacteria produce metabolites that travel through the bloodstream and act on bone cells. Short-chain fatty acids (SCFAs), produced when gut bacteria ferment dietary fiber, promote bone formation and reduce inflammation (11)(14). Tryptophan metabolites, compounds produced when gut bacteria break down the amino acid tryptophan, have been shown to directly inhibit osteoclasts and support osteoblast activity (13).

Gut dysbiosis (an imbalance in gut bacteria) is characterized by reduced microbial diversity and altered metabolite production, and has been linked to increased bone loss (11). When the gut barrier is compromised, bacterial products can enter the bloodstream and trigger chronic low-grade inflammation, which accelerates bone resorption.

Interestingly, gut bacteria also produce melatonin from tryptophan, and this gut-derived melatonin has been shown in animal models to protect against bone loss by increasing beneficial SCFAs and reducing harmful metabolites (15).

What does this mean practically?

• Eat a diverse, fiber-rich diet to feed beneficial bacteria
• Include tryptophan-rich foods (turkey, chicken, fish, eggs, dairy, tofu, nuts, seeds)
• Eat fermented foods regularly (yogurt, kefir, sauerkraut, kimchi, miso)
• Prioritize prebiotic fibers (garlic, onions, leeks, asparagus, oats)
• Maintain good oral hygiene: emerging research shows oral bacteria from gum disease can travel to the gut and disrupt the microbiota in ways that harm bone

Do Probiotics Help Bone Density?

The evidence is growing. A 2025 systematic review and meta-analysis of 16 randomized controlled trials found that probiotic supplementation significantly increased lumbar spine and hip bone mineral density, with the strongest evidence in postmenopausal women (16). 

Another meta-analysis of 12 trials confirmed these findings and noted that the benefit was more pronounced in women with osteopenia than those with established osteoporosis (17). Multi-strain formulations and higher doses appeared to produce greater improvements in bone turnover markers (18).

That said, not all probiotic formulations have shown benefit, and results vary by strain, dose, and population. This is a promising area, but not yet a replacement for proven therapies. Discuss specific strains and dosing with your healthcare team.

Melatonin: More Than a Sleep Hormone

Melatonin, best known for regulating sleep, also influences bone metabolism. It promotes osteoblast activity and inhibits osteoclast activity (19). A one-year randomized controlled trial in postmenopausal women with osteopenia showed that nightly melatonin increased femoral neck bone density in a dose-dependent manner, 0.5% at 1 mg and 2.3% at 3 mg (20). A combination of melatonin (5 mg), strontium citrate, vitamin D3, and vitamin K2 showed favorable effects on bone remodeling markers and BMD at the lumbar spine and femoral neck in another trial (20).

Melatonin also has antioxidant and anti-inflammatory properties, and its production is supported by good sleep hygiene, another reason to prioritize consistent, quality sleep.

Hormones and Bone: What the Evidence Shows

Hormones play a central role in bone health, and their decline often accelerates bone loss, whether the decline is caused by menopause, aging, or medical treatments.

Estrogen is one of the most important hormones for women’s bone health. In the Women’s Health Initiative trial, estrogen therapy reduced clinical fractures by 21–29% and hip fractures by 33–35% (21)(22). However, it also carries risks including blood clots, stroke, and, in the case of combined estrogen-progestin, a small increase in breast cancer risk (21)(22). Current guidelines recommend considering estrogen for bone protection primarily in women under 60 or within 10 years of menopause who have bothersome menopausal symptoms and for whom other osteoporosis therapies are not appropriate (21)(22)(23).

Testosterone replacement in men with low testosterone increases bone mineral density at the spine and hip, but has not been shown to reduce fracture risk. Current Endocrine Society guidelines state that testosterone should not be used as the sole therapy to prevent fractures (as noted in the free guide).

DHEA supplementation (50 mg/day) has shown modest increases in lumbar spine bone density in women but not men, with effects that are small compared to approved osteoporosis medications.

Hormone therapy can be part of a bone health strategy for many patients, but it requires careful individualized risk-benefit assessment with your medical team.

Corticosteroids: A Major but Manageable Risk

Corticosteroid medications (prednisone, prednisolone, dexamethasone) are among the most common causes of secondary osteoporosis. The risk of fracture increases within the first three months of starting oral corticosteroids and rises with higher doses and longer duration (24)(25). Even modest doses of 2.5–7.5 mg of prednisone daily come with a twofold risk of vertebral fracture (24)(25). At very high doses, the risk can increase by as much as 14-fold (24).

Importantly, fracture risk can increase even before measurable changes appear on a DEXA scan, because corticosteroids impair bone quality, not just bone quantity (24)(25).

If you take corticosteroids:

• Never stop or reduce them on your own
• Ask whether you’re on the lowest effective dose
• Ensure adequate calcium (800–1,000 mg/day) and vitamin D (600–800 IU/day)
• Discuss with your doctor whether preventive interventions to prevent bone loss are appropriate, especially if you’re taking 2.5 mg or more of prednisone daily for more than 3 months (26)
• Engage in weight-bearing and resistance exercise as tolerated

Dental Health: An Often-Overlooked Step Before Starting Bone Medications

If your doctor recommends a bisphosphonate or denosumab, get a comprehensive dental evaluation first. These medications slow bone resorption, which is beneficial for your skeleton but can affect the jawbone’s ability to heal after dental procedures. In rare cases, a condition called medication-related osteonecrosis of the jaw (MRONJ) can develop (27).

For people taking osteoporosis-dose medications, the risk is very low, estimated at 1 in 10,000 to 1 in 100,000 per year (27). The risk increases somewhat with longer duration of therapy and is substantially higher in cancer patients receiving much higher doses (28). Complete any needed invasive dental work before starting medication, maintain excellent oral hygiene while on treatment, and inform every dentist you see that you’re taking an antiresorptive medication.

A critical note about denosumab: unlike bisphosphonates, stopping denosumab, even temporarily, can lead to rapid bone loss and a significantly increased risk of vertebral fractures (called a “rebound” effect). Any decision to pause denosumab for dental work requires close coordination between your physician and dentist (29).

Stress, Sleep, and the Bigger Picture

Chronic stress elevates cortisol, which directly impairs bone formation and accelerates bone loss. Prioritize consistent sleep (7–9 hours nightly, which also supports natural melatonin production), stress reduction practices, social connection, and setting boundaries around work demands when possible.

Putting It All Together

A successful approach to bone density requires a comprehensive, sustained framework:

• Calcium: 1,000–1,200 mg/day, preferably from food
• Vitamin D: 600–800 IU/day minimum (your provider may recommend more)
• Vitamin K2: Consider dietary sources or supplementation, especially MK-7
• Protein: Adequate intake distributed throughout the day
• Exercise: 2–3 sessions/week combining resistance training, impact exercise, and balance work
• Gut health: Diverse fiber, fermented foods, and good oral hygiene
• Sleep: 7–9 hours nightly
• Medical monitoring: DEXA scans and blood markers as recommended by your team

Every person’s situation is different. The strategies above are meant to complement rather than replace the guidance of your healthcare team. If you have questions about any of these topics, bring them to your next appointment or set up a free discovery call to learn about working together on your individualized needs.

References

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(2) Committee on Clinical Practice Guidelines–Gynecology. Management of Postmenopausal Osteoporosis: ACOG Clinical Practice Guideline No. 2. Obstetrics & Gynecology. 2022;139(4):698–717. https://doi.org/10.1097/AOG.0000000000004730 

(3) Committee on Clinical Practice Guidelines–Gynecology. Management of Postmenopausal Osteoporosis: ACOG Clinical Practice Guideline No. 2. Obstetrics & Gynecology. 2022;139(4):698–717. https://doi.org/10.1097/AOG.0000000000004730 

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