My grandmother fell and broke her hip when she was 78. She never really recovered. The surgery went well, but she couldn't get her strength back. Within six months, she was in a nursing home. Within a year, she was gone. I've thought about that trajectory many times since. A fall that a 40-year-old might walk away from with minor bruising ended my grandmother's independence and, ultimately, her life.
Osteoporosis—that silent thinning of bone that makes fractures from minor trauma possible—was part of what made my grandmother's break so catastrophic. She had no idea she had it until the fall. Bone density loss, like many aspects of aging, happens gradually and quietly, without symptoms, until something dramatic happens.
The good news is that osteoporosis is largely preventable, and even treatable once identified. Understanding what bone is, how it changes with age, and what you can do about it gives you real power to protect your skeletal health.
Understanding Bone Remodeling
Bone might seem static—it looks like calcium and collagen arranged in a fixed structure. But bone is actually highly dynamic tissue, constantly being broken down and rebuilt through a process called remodeling. Specialized cells called osteoclasts break down old bone; other cells called osteoblasts build new bone. In youth and early adulthood, building exceeds breaking, and bone mass increases. Around age 30, peak bone mass is reached—the most bone you'll ever have. After that, the balance shifts; breaking gradually exceeds building, and bone mass slowly declines.
This decline is normal and universal. The rate varies significantly between individuals based on genetics, hormonal status, nutrition, physical activity, and other factors. Osteoporosis occurs when bone loss becomes excessive—when the structure becomes so fragile that fractures occur from minimal trauma (what doctors call "fragility fractures").
For women, the menopausal transition causes an acceleration of bone loss due to declining estrogen. In the first five to ten years after menopause, women can lose 10-20% of their bone density. This is why osteoporosis is more common in women than men, and why the postmenopausal years are a critical time for bone health intervention.
Risk Factors for Osteoporosis
Several factors increase your risk for osteoporosis:
Female sex: Women are at higher risk than men, especially postmenopausal women with low estrogen
Age: Risk increases with age as bone loss exceeds bone building
Small body frame: People with smaller, thinner bones have less bone mass to lose
Family history: Genetics strongly influence peak bone mass and rate of loss
Certain medications: Long-term corticosteroid use, some epilepsy medications, and other drugs can accelerate bone loss
Certain medical conditions: Hormone-related conditions, malabsorption syndromes, and others can affect bone health
Lifestyle factors: Physical inactivity, smoking, excessive alcohol, and poor calcium/vitamin D intake all contribute
The Screening: Bone Density Testing
Dexa (DXA) scanning is the standard test for measuring bone mineral density. It's quick, painless, and provides detailed information about bone health at key sites—typically the hip and spine. The results are reported as T-scores, which compare your bone density to the average peak bone density of young, healthy adults:
Normal: T-score of -1.0 or above
Osteopenia (low bone mass): T-score between -1.0 and -2.5
Osteoporosis: T-score of -2.5 or below
Screening recommendations: all women 65 and older should have bone density testing; younger women and men with risk factors should be tested earlier or more frequently. If you've had fragility fractures, are on long-term corticosteroids, or have other risk factors, talk to your doctor about when to start screening.
Our Bone Density Assessment Tool can help you understand your risk factors and discuss screening with your healthcare provider.
Building Bones: Nutrition
Calcium and vitamin D are the foundation of bone health. Calcium is the primary mineral in bone; vitamin D is essential for calcium absorption. Both must be adequate for bones to maintain their strength.
Calcium: The recommended intake for adults over 50 is 1000-1200 mg daily, preferably from food sources. Dairy products are rich sources, but so are leafy green vegetables (especially kale, bok choy, and broccoli), fortified plant milks and juices, canned fish with bones, and some legumes. Calcium supplements may be appropriate if dietary intake is insufficient, but the evidence that high-dose calcium supplements reduce fractures is weaker than the evidence for adequate dietary calcium. Talk to your doctor about what's right for you.
Vitamin D: Critical for calcium absorption, vitamin D is largely synthesized in the skin through sun exposure. However, many people—especially those in northern latitudes, those who spend most of their time indoors, and older adults whose skin is less efficient at vitamin D synthesis—don't make enough. Most adults over 50 would benefit from supplementation; ask your doctor to test your levels.
Beyond calcium and vitamin D, overall nutrition matters. Protein, magnesium, zinc, vitamin K, and other nutrients all play roles in bone health. A varied, whole-food diet—the same Mediterranean-style eating pattern that benefits cardiovascular health—supports bone health as well.
Building Bones: Exercise
Bone is living tissue that responds to the demands placed on it. Weight-bearing exercise—exercise where you work against gravity with your body supported—stimulates bone to maintain its density. Without this stimulus, bone senses it isn't needed and becomes less dense.
The best exercises for bone health are weight-bearing activities:
Walking, hiking, and stair climbing: These everyday activities place beneficial stress on hip and spine bones
Dancing and aerobic exercise: Weight-bearing cardio provides similar benefits
Tennis, golf, and other recreational sports: The twisting and turning movements are particularly beneficial
Resistance training: Lifting weights stresses bones directly and builds muscle that supports bone health
Impact exercises: Jumping and hopping, even in small amounts, can help maintain bone density in younger postmenopausal women
Swimming and cycling, while excellent for cardiovascular health and muscle strength, are not weight-bearing and don't provide the same bone stimulus. If these are your primary exercises, adding some weight-bearing activities is important for bone health.
Other Risk Factors to Address
Smoking: Smoking is associated with lower bone density and higher fracture risk. If you smoke, quitting is one of the best things you can do for your bones (and your overall health).
Excessive alcohol: Heavy alcohol consumption interferes with calcium balance and increases fall risk. Moderate consumption (1 drink per day for women, 2 for men) appears acceptable; beyond that, bone health suffers.
Medications: Long-term corticosteroid use (for conditions like rheumatoid arthritis or COPD) is particularly damaging to bone. If you're on chronic steroids, your doctor should be monitoring your bone health and may recommend preventive treatment. Never stop prescribed medications without discussing it with your provider.
Falls: Preventing falls becomes increasingly important as bones become more fragile. This means addressing vision and balance problems, removing home hazards, using assistive devices if needed, and being cautious about medications that affect balance.
Treatment Options
If you've been diagnosed with osteoporosis or significant osteopenia, various treatment options exist. These range from lifestyle interventions (the same nutrition and exercise approaches that prevent osteoporosis can slow its progression) to medications that reduce bone loss or even increase bone density.
Bisphosphonates (like alendronate and risedronate) are commonly prescribed as first-line medications for osteoporosis. They slow the activity of bone-breaking cells, allowing bone-building cells to catch up. Other medications are available for different situations.
Treatment decisions depend on the severity of osteoporosis, your risk of fracture, your overall health, and your preferences. This is a conversation to have with your healthcare provider. The goal is not to treat a bone density number—it's to prevent fractures and maintain quality of life.
Building the Foundation
My grandmother never knew she had osteoporosis until it was too late. She might have made different choices if she'd known—more exercise, different nutrition, perhaps medication to slow the loss. Her mother, I learned later, had the same fate. Osteoporosis was silently devastating her family for generations.
You don't have to repeat that pattern. Get screened if you're due for it. Make sure you're getting adequate calcium and vitamin D. Walk, move, lift weights—put demands on your skeleton so it has reason to stay strong. These aren't heroic interventions. They're the basic building blocks of skeletal health that most of us have the power to implement. Your bones will carry you through every day of your life. Take care of them.