Preventing osteoporosis comes down to building as much bone as possible when you’re young and losing as little as possible as you age. The single most powerful statistic: a 10% increase in peak bone mass can reduce your risk of osteoporotic fractures later in life by 50%. That means prevention isn’t something that starts at menopause. It starts decades earlier, and the strategies shift depending on your stage of life.
Why Peak Bone Mass Matters So Much
Your bones aren’t static. They’re constantly being broken down and rebuilt. During childhood and early adulthood, the building outpaces the breakdown, and your skeleton grows denser. This process peaks around age 22 in women and closer to age 25 to 27 in men. After that, bone density gradually declines for the rest of your life.
The bone density you reach at that peak matters more than you might expect. Research shows that peak bone mass makes a greater contribution to your bone density in later life than the rate at which you lose bone, at least until about 15 years after menopause. Think of it like a retirement account: the more you deposit early, the more you have to draw from later. If you’re in your teens or twenties, the most important thing you can do is eat well, stay active, and avoid the habits that sabotage bone building. If you’re older, the goal shifts to slowing loss and preventing falls.
Get Enough Calcium at Every Age
Calcium is the primary mineral in bone, and your body can’t make it. If you don’t get enough from food, your body pulls it from your skeleton. The recommended daily intake varies by age and sex:
- Adults 19 to 50: 1,000 mg per day
- Women 51 to 70: 1,200 mg per day
- Men 51 to 70: 1,000 mg per day
- Everyone over 70: 1,200 mg per day
Dairy is the most common source, but it’s far from the only one. Half a cup of firm tofu prepared with calcium sulfate contains roughly 860 mg, which is nearly a full day’s requirement in a single serving. A cup of whole dry-roasted almonds has about 370 mg. Raw kale is often cited as a bone-friendly green, but a cup of raw kale only provides about 53 mg, so you’d need to eat a lot of it. Frozen kale is denser at around 91 mg per cup. Sardines, canned with bones, are another excellent option.
If you struggle to reach your daily target through food alone, a supplement can fill the gap. Calcium carbonate is best absorbed with food, while calcium citrate can be taken on an empty stomach. Splitting doses into 500 mg or less at a time improves absorption.
Don’t Overlook Vitamin D
Calcium can’t do its job without vitamin D, which your body needs to absorb calcium from your gut. Most adults need 600 to 800 IU per day, though many experts recommend higher amounts, especially if you live in a northern climate, have darker skin, or spend most of your time indoors. Your doctor can check your levels with a simple blood test. Fatty fish, egg yolks, and fortified milk or orange juice are dietary sources, but sunlight exposure is how your body produces the most vitamin D naturally.
Exercise That Builds Bone
Bone responds to mechanical stress. When muscles pull on bone and gravity pushes down on your skeleton, bone-building cells get the signal to lay down new tissue. Two types of exercise matter most: weight-bearing aerobic activity and resistance training.
Weight-bearing aerobic exercise means anything where your feet hit the ground and your body works against gravity. Running, jumping rope, hiking, dancing, and high-impact aerobics all qualify. Swimming and cycling, while great for cardiovascular health, don’t load the skeleton enough to stimulate bone growth.
Resistance training targets bone more directly. The greatest benefits come from lifting progressively heavier loads, working at around 80% to 85% of the maximum you can lift for one repetition, and focusing on large muscle groups that cross the hip and spine. Squats, deadlifts, lunges, back extensions, and hip abduction exercises are all effective. The World Health Organization recommends strength training at least two days per week, with at least two sets of each exercise at 8 to 12 repetitions. If you’re new to lifting, starting lighter and building up is fine.
Combining both types of exercise is ideal. Resistance training provides muscular loading while weight-bearing aerobic exercise adds mechanical stress from impact. Together, they protect the two areas most vulnerable to osteoporotic fractures: the hip and the spine.
Balance Training to Prevent Falls
Bone density is only half the equation. A fracture requires both fragile bone and a fall (or similar force). For people who already have low bone density, balance and stability exercises are critical. Specific recommendations include postural correction exercises, balance training (like single-leg stands or tandem walking), trunk and lower-body strengthening, and regular aerobic activity. These improve functional performance, spine stability, and confidence on your feet. Even simple daily habits like standing on one leg while brushing your teeth can make a difference over time.
Watch Your Sodium Intake
Here’s a connection most people don’t know about: the more sodium you eat, the more calcium your kidneys flush out. For every 2,300 mg of dietary sodium (roughly one teaspoon of table salt), your body excretes an additional 40 mg of calcium in urine. That may sound small, but it adds up day after day. Research in young women found that higher sodium intake was linked to lower hip bone density, and this effect was strongest in women who were already getting too little calcium. Keeping sodium under 2,300 mg per day is a reasonable target, and it benefits your blood pressure too.
Quit Smoking
Nicotine is directly toxic to the cells that build bone. Lab research on human bone-building cells shows that nicotine triggers a chain reaction: it causes a buildup of damaging molecules inside the cell, which eventually pushes the cell into a programmed death pathway. Fewer bone-building cells means less new bone tissue and slower repair of existing bone. Smoking also accelerates estrogen breakdown in women, which compounds the problem since estrogen is one of the hormones that protects bone density. If you smoke, quitting is one of the most impactful things you can do for your skeleton.
Limit Alcohol to Two Drinks or Fewer
Moderate alcohol consumption (one to two drinks per day) doesn’t appear to significantly harm bone. But the risk rises sharply after that. Three drinks per day increases hip fracture risk by about 33%, and four drinks per day raises it by roughly 59%, compared to non-drinkers. Chronic heavy drinking interferes with the activity and growth of bone-building cells, undermining both new bone formation and the repair of existing bone. If you drink, staying at two or fewer standard drinks per day keeps you below the threshold where measurable harm begins.
Hormone Therapy After Menopause
Estrogen plays a major role in maintaining bone density, and the drop in estrogen at menopause is the single biggest driver of bone loss in women. Menopausal hormone therapy effectively prevents this loss and reduces fracture risk at the hip, spine, and other sites.
Current guidelines consider hormone therapy appropriate for osteoporosis prevention in women younger than 60 or within 10 years of menopause. In clinical trials, standard-dose therapy increased bone density at the lumbar spine by about 4.5% to 6.8% and at the hip by 3.7% to 4.1% over two years. Even low-dose formulations improved bone density in older postmenopausal women. For women with premature ovarian insufficiency (menopause before age 40), hormone therapy is particularly important for preventing early-onset osteoporosis.
One important caveat: the bone-protective effect disappears quickly after stopping therapy. This means hormone therapy delays bone loss rather than permanently preventing it. The decision to start or continue involves weighing bone benefits against other health considerations, which vary from person to person.
When to Get Screened
You can’t feel bone loss happening. The first sign of osteoporosis is often a fracture from a minor fall or even a sneeze. Screening with a bone density scan is recommended for all women starting at age 65. Women who have gone through menopause before 65 and have risk factors (low body weight, family history of hip fracture, smoking, or certain medications like long-term corticosteroids) should talk to their doctor about earlier screening. Guidelines for men are less standardized, but screening is generally considered for men over 70 or those with clear risk factors.
Getting a baseline scan gives you a number to track over time and lets you know whether the prevention strategies you’re using are working, or whether you need to step things up.