Calcium is the building block of strong bones, and dairy foods like milk and yogurt are well-known sources. But getting enough calcium is only part of the equation — how well your body absorbs it matters too. Some otherwise healthy foods can reduce absorption when eaten at the same time as calcium-rich foods or supplements.

Key Points

• Wheat bran and other high-fiber foods can reduce calcium absorption when eaten together.
• Beans and legumes contain phytates that slow mineral absorption.
• High sodium intake increases the amount of calcium lost through the kidneys.
• Timing calcium intake and moderating sodium can help protect bone density.

1. High-fiber cereal

Fiber offers real benefits: it aids digestion, helps lower LDL cholesterol, supports blood sugar control and reduces heart disease risk. But fiber — particularly wheat bran — can bind calcium and reduce how much is absorbed when they're eaten together.

That doesn't make high-fiber cereal with milk a bad breakfast. If you're trying to boost calcium or take a supplement, though, consider taking it a few hours apart from a high-fiber meal.

2. Beans and legumes

Legumes are an excellent source of protein and fiber and a great alternative to meat. They also contain phytates, compounds that can slow the absorption of calcium and other minerals. Soaking beans before cooking can reduce phytate levels. If you take calcium supplements for bone health, spacing them a few hours from legume-heavy meals may help.

3. High-sodium foods

Too much sodium raises blood pressure and heart disease risk, and it also causes the kidneys to excrete more calcium. Over time, that can affect bone density. Cutting back on canned, processed and restaurant foods is the easiest way to reduce sodium.

Other Ways to Support Bone Health

• Get enough vitamin D, which helps the body absorb calcium.
• Do weight-bearing and resistance exercise.
• Limit alcohol and avoid smoking.
• Ask your doctor about bone density testing, especially after menopause or if you have risk factors.

Checking Bone Health

Bone loss is usually silent until a fracture happens. DEXA scans are the standard test for diagnosing osteoporosis, and CT imaging can also reveal signs of bone density loss and spinal changes. A full body scan examines the spine along with internal organs, and the Advanced Body Scan FAQ covers what's included. Discuss any findings with your physician; the physicians who review scans are listed on the company's site.