- Mercy Nurse
- Symptom Navigator
- Levitt Medical Library
- Health Information
- Body Guide
- Multimedia Encyclopedia
- In-Depth Health Reports
- Complementary & Alternative Medicine
- Drug Information Center
- Drug Interactions
- Wellness Tools
- Today's Medical News
- Pregnancy Health Center
- Recursos EspaÃ±oles De la Salud
- Enciclopedia Multimedia
- Centro de Information sobre el Embarazo
Osteoporosis, which means "porous bone," is a disease in which the bones gradually become weak and brittle. The condition often results in broken bones, or fractures -- especially of the hip, wrist, and spine -- even from simple activities like lifting a chair or bending over. According to the National Institutes of Health (NIH), about 34 million Americans have osteoporosis. Another 18 million have low bone mass and are at an increased risk for the disease. Osteoporosis is common among the elderly, but the disease can strike at any age. Although it is more common in older women, men can also have osteoporosis. One of every 2 women and 1 in every 4 men older than 50 years of age will have an osteoporosis related fracture in their lifetime.
Osteoporosis is a potentially crippling disease. Estimates from the NIH indicate that osteoporosis is responsible for about 2 million fractures annually. Fortunately, most Americans can avoid osteoporosis altogether by eating a well balanced diet, exercising regularly, and living a healthy lifestyle. That's important for young people, too, because you accumulate about 85% - 90% of your bone mass by age 18 or 20.
Signs and Symptoms
Osteoporosis is sometimes considered a "silent disease" because bone loss occurs without symptoms. In fact, many people don't know they have the disease until they break a bone. Osteoporosis can also cause a vertebra (one of the 33 bony segments that form the spine) to collapse. Signs of a collapsed vertebra include:
What Causes It?
Your bone strength and density is partly due to how much calcium and other minerals they contain. Your body is constantly making new bone and breaking down (reabsorbing) old bone. When you are young, this process happens quickly. You make more bone than you lose, so you build bone mass. After your mid 30s, your body continues to make new bone, but more slowly, causing you to lose more bone than you make. The amount of bone you have in your 30s helps determine your risk of developing osteoporosis later. For women, bone loss increases significantly at menopause, when estrogen levels drop.
Other than age and menopause, causes of osteoporosis can include:
Osteoporosis can be prevented. Because your body builds bone mass until you are in your 30s, prevention should start early. Making sure you get enough calcium and vitamin D (required for your body to use calcium) is essential.
Weight bearing exercise, such as walking or lifting weights, as well as other exercises, including tai chi, can also help stave off the disease. Research has shown that exercise early in life boosts bone mass, while exercise later in life helps to maintain it. Exercise also increases strength, coordination, and balance. Experts recommend 1/2 hour of weight bearing exercise daily. These are important tools to help prevent falls that cause fractures, especially in the elderly.
Other techniques for prevention include:
What to Expect at Your Provider's Office
If your doctor believes you are at risk for osteoporosis, he/she will order a bone mineral density test (BMD) to determine your bone mass. Several tests can measure bone density, and they are all painless, noninvasive, and safe. Some tests measure bone density in the spine, wrist, and hip (the most common sites of fractures due to osteoporosis), while others measure bone in the heel or hand.
The National Osteoporosis Foundation recommends a BMD for women who are not taking estrogen and:
For those who are at risk for osteoporosis or already have the disease, current treatments are designed to boost bone mass and prevent (further) bone loss. While calcium by itself doesn't cure or prevent osteoporosis, getting enough calcium is an essential part of any prevention or treatment program. Making lifestyle choices, such as eating a diet rich in fruits and vegetables and doing weight bearing exercises can also enhance bone strength.
Studies suggest that diets rich in the following foods and nutrients may help prevent bone loss in both men and women:
Exercise can help prevent bone loss. Although it is best to begin exercising when you are young (to help build bone), it's never too late to get the benefit. Weight bearing exercise (walking, weight lifting) stimulates bones to produce more cells, slowing bone loss. Exercise also improves balance, flexibility, strength, and coordination -- thereby reducing falls and broken bones associated with osteoporosis.
The standard treatment for osteoporosis for postmenopausal women used to be estrogen, but there are new options for men and for women who are wary of estrogen's risks. Most medications slow down the rate at which bone is reabsorbed (antiresorptive). One drug can help the body make new bone (bone forming).
Surgery and Other Procedures
A procedure called kyphoplasty can be used to treat kyphosis, the humplike deformity sometimes caused by osteoporosis. A catheter inserts a balloon into the middle of a collapsed vertebra and then expands so that height of the vertebra is restored. The surgeon then injects bone cement into the vertebra to hold its shape. Vertebroplasty is another procedure in which cement is injected into the vertebra to reinforce it.
Complementary and Alternative Therapies
Nutrition and Supplements
Eating fruits and vegetables and consuming adequate amounts of calcium and vitamin D are crucial in the prevention and treatment of osteoporosis. Keeping bones healthy throughout life depends on getting enough of specific vitamins and minerals, including phosphorous, magnesium, boron, manganese, copper, zinc, folate, and vitamins B12, B6, C, and K. Avoiding sodium, alcohol, and caffeine will also enhance bone health.
Calcium -- Calcium helps the body build bone. Recommended intakes of calcium are as follows (note that you generally get from 500 - 700 mg of calcium in your diet):
The recommended intake for older women is 1,500 mg/day, except for those on estrogen, who need only 1,000 mg/day.
Good dietary sources of calcium include:
If you do not get enough calcium from food alone, you may want to take a calcium supplement. There are several different kinds available. Ask your doctor which one is right for you:
Calcium supplements should be taken in divided doses during the day, because your body can only absorb 500 mg of calcium at a time. Work with your doctor to make sure you get enough, but not too much, calcium.
Vitamin D -- In order to absorb enough calcium, your body also needs vitamin D. The National Osteoporosis Foundation recommends the following:
Vitamin K (150 - 500 mcg) -- Vitamin K, which the body makes in the intestine, helps bind calcium into bone. A recent study suggests that at menopause, vitamin K may start to lose its ability to bind calcium, so that even women with normal levels of vitamin K may not have enough to maintain bone health. Eating 3 servings of low fat dairy or dark, leafy greens per day can help. Talk to your doctor about whether you need a supplement, especially if you take blood thinning medications (diuretics).
Soy isoflavones -- Isoflavones are phytoestrogens, plant chemicals that have some of the same effects as estrogen. Because estrogen helps protect against osteoporosis, researchers theorize that isoflavones may also help stop bone loss. Studies are conflicting, however. The best source of soy isoflavones is through your diet (tofu, soy milk, soybeans); when isoflavones are eaten in foods, they don't appear to have the same negative effects that supplemental estrogen does. If you have a history of hormone related cancer, talk to your doctor before taking soy. Soy contains phytic acid, which may block the aborption of calcium and other critical minerals.
Ipriflavone (600 mg per day) -- Ipriflavone, a synthetic isoflavone derived from natural isoflavones found in soy, red clover, and other food sources, may also help prevent and treat osteoporosis. Most studies -- though not all -- indicate that ipriflavone, when combined with calcium, can slow bone loss and help prevent fractures of the vertebrae (spine) in postmenopausal women. Talk to your doctor before taking ipriflavone.
Omega-3 fatty acids, such as those found in fish oil (4 g per day) -- A few studies have shown that supplements containing essential fatty acids, such as those found in fish oil, can help maintain or possibly increase bone mass. Essential fatty acids appear to increase the amount of calcium your body absorbs, diminish the amount of calcium lost in urine, improve bone strength, and enhance bone growth. Foods rich in essential fatty acids (including coldwater fish, such as salmon) can help raise the amount of essential fatty acids in your diet. People who are taking blood thinning medication (anticoagulants) should not take fish oil supplements without talking to their doctor first.
Preliminary studies also suggest that the following nutrients may help prevent or treat osteoporosis:
(See the "Warnings and Precautions section" for a list of supplements that people with osteoporosis should avoid.)
Although most herbs have not been studied extensively for the treatment of osteoporosis, some have estrogen like effects that might offer protection against bone loss. However, they may also carry some of the same risks as supplemental estrogen. Talk to your doctor before taking any of these herbs.
Other herbs that may help prevent or treat osteoporosis (evidence is lacking so far) include:
Warnings and Precautions
Some studies suggest that too much vitamin A may increase the risk for osteoporosis. People with osteoporosis, or those at risk for it, should not exceed the daily recommended intake of vitamin A (900 mcg/day for men and 700 mcg/day for women).
Certain medications may contribute to the development of osteoporosis when used for long periods of time:
Talk to your doctor if you take any of these medications.
Prognosis and Complications
Bone fractures are the most common complications of osteoporosis and are a significant cause of disability and death. After age 60, 25% of women have a spinal fracture -- and that percentage doubles after age 75. By age 90, 33% of women and 17% of men have had a hip fracture, usually from a minor fall or accident. Many elderly people who suffer a hip fracture lose the ability to walk and, most significantly, up to 36% die within one year.
Although about 2 million bone fractures in the U.S. each year result from osteoporosis, most are preventable. Several medications are currently being researched that may expand the treatment options available to people with osteoporosis. In the meantime, a combination of medications, diet, exercise, and calcium and vitamin D supplements can help slow the progression of the disease.
Alekel DL, St Germain A, Peterson CT, Hanson KB, Stewart JW, Toda T. Isoflavone-rich soy protein isolate attenuates bone loss in the lumbar spine of perimenopausal women. Am J Clin Nutr. 2000;72:844-852.
Alexandersen P, Toussaint A, Christiansen C, et al. Ipriflavone in the treatment of postmenopausal osteoporosis. JAMA. 2001;285:1482-1488.
Atkinson C, Compston JE, Robins SP, Bingham SA. The effects of isoflavone phytoestrogens on bone; preliminary results from a large randomised controlled trial. Presented at: 82nd Annual Endocrine Society Meeting; June 23, 2000; Toronto, Ontario, Canada.
Belkoff SM, Mathis JM, Fenton DC, Scribner RM, Reiley ME, Talmadge K. An ex vivo biomechanical evaluation of an inflatable bone tamp used in the treatment of compression fracture. Spine. 2001;26(2):151-156.
Bhattacharya A, Rahman M, Sun D, Fernandes G. Effect of fish oil on bone mineral density in aging C57BL/6 female mice. J Nutr Biochem. 2006 Sep 7 (Epub ahead of print).
Blumenthal M, Goldberg A, Brinkmann J, eds. Herbal Medicine: Expanded Commission E Monographs. Newton, Mass: Integrative Medicine Communications; 2000:201-204.
Bope: Conn's Current Therapy 2010, 1st ed. St. Louis, MO: Saunders Elsevier Inc.; 2009.
Byers RJ, Hoyland JA, Braidman IP. Osteoporosis in men: a cellular endocrine perspective of an increasingly common clinical problem. J Endocrinol. 2001;168(3):353-362.
Consensus Opinion. The role of calcium in peri- and postmenopausal women: consensus opinion of the North American Menopause Society. Menopause. 2001;8:84-95.
Erdman JW, Stillman RJ, Boileau RA. Provocative relation between soy and bone maintenance. Am J Clin Nutr. 2000;72:679-680.
Geller JL, Adams JS. Vitamin D therapy. Curr Osteoporos Rep. 2008 Mar;6(1):5-11. Review.
Geller SE, Studee L. Soy and red clover for mid-life and aging. Climacteric. 2006 Aug;9(4):245-63. Review.
Gillespie WJ, Avenell A, Henry DA, O'Connell DL, Robertson J. Vitamin D and vitamin D analogues for preventing fractures associated with involutional and post-menopausal osteoporosis (Cochrane Review). In: The Cochrane Library, Issue 1, 2001. Oxford: Update Software.
Grados F, Depriester C, Cayrolle G, Hardy N, Deramond H, Fardellone P. Long-term observations of vertebral osteoporotic fractures treated by percutaneous vertebroplasty. Rheumatology (Oxford). 2000; 39(12):1410-1414.
Hannan S, Blumberg J, Cupples LA, Kiel DP, Tucker KL. Inverse association of carotenoid intakes with 4-y change in bone mineral density in elderly men and women: the Framingham Osteoporosis Study. Am J Clin Nutr. 2009;89(1):416-24.
Kass-Annese B. Alternative therapies for menopause. Clin Obstet Gynecol. 2000;43(1):162-183.
Kim MH, Bae YJ, Choi MK, Chung YS. Silicon Supplementation Improves the Bone Mineral Density of Calcium-Deficient Ovariectomized Rats by Reducing Bone Resorption. Biol Trace Elem Res. 2008 Nov 27. [Epub ahead of print]
Kronenberg: Williams Textbook of Endocrinology, 11th ed. St. Louis, MO: Saunders Elsevier Inc.; 2008.
Matsushita H, Barrios JA, Shea JE, Miller SC. Dietary fish oil results in a greater bone mass and bone formation indices in aged ovariectomized rats. J Bone Miner Metab. 2008;26(3):241-7.
Mazziotti G, Canalis E, Giustina A. Drug-Induced Osteoporosis: Mechanisms and Clinical Implications. The Amer J of Med. 2010;123(10).
Murphy L, Singh BB. Effects of 5-Form, Yang Style Tai Chi on older females who have or are at risk for developing osteoporosis. Physiother Theory Pract. 2008 Sep-Oct;24(5):311-20.
Nachtigall LE. Isoflavones in the management of menopause. Journal of the British Menopause Society. 2001;Supplement S1:8-12.
Nakaoka D, Sugimoto T, Kobayashi T, Yamaguchi T, Kibayashi A, Chihara K. Evaluation of changes in bone density and biochemical parameters after parathyroidectomy in primary hyperparathyroidism. Endocr J. 2000;47(3):231-237.
Newton KM, LaCroix AZ, Levy L, Li SS, Qu P, Potter JD, Lampe JW. Soy protein and bone mineral density in older men and women: a randomized trial. Maturitas. 2006 Oct 20;55(3):270-7.
Occhiuto F, Pasquale RD, Guglielmo G, Palumbo DR, Zangla G, Samperi S, Renzo A, Circosta C. Effects of phytoestrogenic isoflavones from red clover (Trifolium pratense L.) on experimental osteoporosis. Phytother Res. 2007 Feb;21(2):130-4.
Peacock M, Liu G, Carey M, McClintock R, Ambrosius W, Hui S, Johnston CC. Effect of calcium or 25OH Vitamin D3dietary supplementation on bone loss at the hip in men and women overthe age of 60. J Clin Endocrinol Metab. 2000;85:3011-3019.
Peh WC, Gilula LA, Zeller D. Percutaneous vertebroplasty: a new technique for treatment of painful compression fractures. Mo Med. 2001;98(3):97-102.
Poulsen RC, Kruger MC. Soy phytoestrogens: impact on postmenopausal bone loss and mechanisms of action. Nutr Rev. 2008 Jul;66(7):359-74. Review.
Pritchett JW. Statins and dietary fish oils improve lipid composition in bone marrow and joints. Clin Orthop Relat Res. 2006 Nov 9 (Epub ahead of print).
Putnam SE, Scutt AM, Bicknell K, Priestley CM, Williamson EM. Natural products as alternative treatments for metabolic bone disorders and for maintenance of bone health. Phytother Res. 2007 Feb;21(2):99-112.
Rebbeck TR, Troxel AB, Norman S, Bunin GR, Demichele A, Baumgarten M, Berlin M, Schinnar R, Strom BL. A retrospective case-control study of the use of hormone-related supplements and association with breast cancer. Int J Cancer. 2007 Apr 1;120(7):1523-8.
Sellmeyer DE, Stone KL, Sebastian A, Cummings SR. A high ration of dietary animal to vegetable protein increases the rate of bone loss and the risk of fracture in postmenopausal women. Am J Clin Nutr. 2001;73:118-122.
Sharkey NA, Williams NI, Guerin JB. The role of exercise in the prevention and treatment of osteoporosis and osteoarthritis. Nursing Clin N Am. 2000;35:209-221.
Shiraki M, Shiraki Y, Aoki C, Miura M. Vitamin K2 (menatetrenone) effectively prevents fractures and sustains lumbar bone mineral density in osteoporosis. J Bone Miner Res. 2000;15:515-521.
Somekawa Y, Chiguchi M, Ishibashi T, Aso T. Soy intake related to menopausal symptoms, serum lipids, and bone mineral density in postmenopausal Japanese women. Obstet Gynecol. 2001;97:109-115.
Sweet M, Sweet J, Jeremiah M, Galazka S, Diagnosis and Treatment of Osteoporosis. Amer Fam Phys. 2009;76(3).
Writing Group for the Women's Health Initiative Investigators: Risks and benefits of estrogen plus progestin in healthy postmenopausal women: principal results from the Women's Health Initiative randomized controlled trial. JAMA 2002; 288:321-333.
Zhang Y, Chen WF, Lai WP, Wong MS. Soy isoflavones and their bone protective effects. Inflammopharmacology. 2008 Sep 26.
Review Date: 12/11/2010
Reviewed By: Steven D. Ehrlich, NMD, Solutions Acupuncture, a private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.