Calcium and calcium supplements: Achieving the right balance

Calcium is important for optimal bone health throughout your life. The Institute of Medicine recently updated the recommended daily allowance (RDA) for calcium and vitamin D. Does your diet deliver?
Although diet is the best way to get calcium, calcium supplements are an option if your diet falls short. Before you consider calcium supplements, though, be sure you understand how much calcium you need, the pros and cons of calcium supplements, and which type of calcium supplement to choose.

The benefits of calcium

Your body needs calcium to build and maintain strong bones. If your body lacks sufficient calcium over many years, you could face health problems related to weaker bones:

• Children may not reach their full potential adult height.
• Adults may have more bone fractures.
• The risk of osteoporosis increases.

Some research studies have suggested that calcium, along with vitamin D, may have benefits beyond bone health, perhaps protecting against cancer, diabetes and high blood pressure. But definitive evidence about such health benefits is lacking.

Calcium requirements

How much calcium you need depends on your age and sex. Note that the upper limit in the chart represents the safe boundary — it's not how much you should aim to get. If you exceed the upper limit, you increase your risk of health problems related to excessive calcium.