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... album supplement? You may want to if you " re one of the 18 million Americans who's at risk for osteoporosis, a condition in which bones slowly lose mass and deteriorate. That's the conclusion of a new Mayo Clinic study, which found that calcium supplements, if taken regularly, do reduce bone loss to a moderate degree. The study followed 177 women (age 61 to 70) with no history of osteoporosis for 4 years. They were given either 1, 600 milligrams (mg) of calcium a day or a placebo.
At the end, the women who took the supplements had slightly higher (about 1 percent) bone density levels in areas measured lumbar spine, femur (thigh bone) and total body bone mineral than women who took the inactive pills. The women who took the supplements also had lower levels in the blood of chemical indicators for bone resorption. Bone resorption is the opposite of bone formation and can lead to bone loss. Therapies that reduce bone resorption can prevent or slow the development of osteoporosis. "The calcium supplement definitely had an effect on bone loss, " says B.
Lawrence Riggs, M. D. , a Mayo Clinic endocrinologist and director of the study. "But the effect is much weaker than those produced by drug therapies for osteoporosis. Anyone with significant bone loss can't depend on supplements alone for treatment. They will need other, more potent agents, such as estrogen, bisphosphonates (the best known of which is alendronate, trade name Fosamax) and calcitonin (a hormonal drug that reduces bone resorption). "But for healthy individuals, calcium supplements are something everyone at risk for osteoporosis should take, " says Dr. Riggs. "They are relatively cheap, they are well-tolerated, and they have no significant side effects. " Osteoporosis is the weakening of bone that can occur as you get older. As bones get thinner with age, they become weaker.
There is a much greater risk they will break if you fall or have a minor injury. Medical complications of these injuries can result in longer stays at the hospital, disability, and even death. Osteoporosis is most common in white and Asian women, especially slender women, but it can occur in women of any race. Osteoporosis occurs as women get older.
After menopause women produce much less of the sex hormone estrogen. Estrogen helps women's bones stay strong. For example, it helps deposit calcium in the bones. Low levels of estrogen cause a weakening of the bones. Women who smoke or are physically inactive are at a greater risk of developing osteoporosis as they grow older.
Too little calcium in the diet or a family history of osteoporosis are other risk factors. In addition to aging, other causes of osteoporosis are: &# 61623; surgical removal of the ovaries, which reduces estrogen levels &# 61623; intense exercise (such as marathon running), which reduces estrogen levels &# 61623; long periods of bed rest during serious illness &# 61623; too much aluminum hydroxide, a common antacid used to treat heartburn and ulcers. You may have no symptoms until a bone breaks. Broken bones are the most common problem for people with osteoporosis. Often it's the hip, arm, or wrist that breaks.
The bones of the spine are also a common area of thinning. Often, over time, the bones of the spine (vertebrae) collapse on themselves, one at a time, causing loss of height, back pain, and a stooping posture. Your health care provider may discover you have osteoporosis from an x-ray taken for some other problem. Otherwise, the diagnosis might be made from a review of your medical history and symptoms, a physical exam, x-rays, and blood tests. If you are in a high-risk category, your provider may order tests that measure the density of the bones in your forearm and spine. Treatment cannot eliminate osteoporosis, but medications can slow down the loss of bone and rebuild some bone.
The single most effective treatment for osteoporosis is estrogen (hormone replacement therapy). Women begin to produce less estrogen before menopause. Without this hormone to help bones stay strong, women are more likely to have osteoporosis. Starting to take estrogen pills around the time of menopause is the best way to slow calcium loss from the bones and keep the bones strong. The greatest loss of bone density occurs in the first years of menopause. For this reason many health care providers prescribe estrogen for women who are close to menopause.
There are pros and cons for taking estrogen. Estrogen helps slow the loss of bone and may decrease your risk of heart and blood vessel disease. However, estrogen taken alone, without the hormone progesterone, may increase the risk of uterine cancer. Also, your health care provider may not recommend that you take estrogen if you have a history of breast cancer, blood clots, or stroke. You and your health care provider need to discuss your particular situation.
Treatment also includes increasing the calcium your body gets, usually through diet and supplements. Calcium is helpful in the treatment of osteoporosis, especially if you are not taking estrogen, but it is not nearly as helpful as estrogen. Most adult women should have 1000 mg of calcium a day. Women who are pregnant or who are breast-feeding need 1200 to 1500 mg per day. Postmenopausal women who are not taking estrogen supplements need 1500 mg a day. New treatments for osteoporosis are being studied.
Examples of new medicines are: &# 61623; Calcitonin, which helps prevent bone weakening but is not as effective as estrogen. The most convenient form of calcitonin is a nasal spray, which you use once a day. &# 61623; Alendronate (Fosamax), which also helps prevent bone weakening and helps build some bone. It is taken in the form of pills once a day. &# 61623; Raloxiphene (Evista), which is a new estrogen like drug that keeps bone dense without increasing the risk of uterine cancer. It is taken as a pill once a day. These medicines are most often prescribed for women who cannot take estrogen or who have already had a fracture due to osteoporosis. Weight-bearing exercise, such as walking or stair climbing, also helps keep your bones strong.
Doing this kind of physical activity every day may help stop further weakening of your bones. Swimming, although very healthy, is not a weight-bearing exercise. It can be part of your overall fitness program, but for women at risk for osteoporosis, exercise should include walking. The risk of a broken bone resulting from osteoporosis increases with age. Once menopause begins, most women, especially Caucasian and Asian women, need to take precautions for the rest of their lives to prevent osteoporosis. Follow the treatment prescribed by your health care provider.
In addition, you can: &# 61623; Eat healthy foods, especially low-fat milk and dairy products, green leafy vegetables, citrus fruits, sardines, and shellfish. &# 61623; Take a daily calcium supplement if your provider recommends it. &# 61623; Do weight-bearing physical activity, such as walking, regularly. Be sure to exercise your upper body also. What can I do to help prevent osteoporosis? You can help prevent osteoporosis with: &# 61623; hormone replacement therapy, or other medications recommended by your health care provider, at menopause &# 61623; adequate calcium in your diet, both before and after age 35 (the age when a woman's bone density is at its peak) What can I do to reduce my risk of injury? You can reduce the risk of injury and broken bones if you: &# 61623; Avoid lifting heavy objects. &# 61623; Avoid unusually vigorous physical activity; build your activity level gradually. &# 61623; Wear proper footwear: low-heeled shoes with non slippery soles for walking and suitable shoes for sports and recreation.
Make sure the soles of your shoes don't catch on carpeted surfaces. &# 61623; Use support for walking, such as a cane, if you need it. &# 61623; Maintain a safe, well-lit, and uncluttered home to help prevent falls. &# 61623; Avoid throw rugs on your floors at home. Avoid icy, wet, or slippery surfaces, especially in the bathroom. Use nonskid mats in the shower and bathtub. Bibliography:
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