Centrum 50+ products contain a wide array of vitamins and minerals including vitamin A, beta?carotene, calcium and iodine, according to the manufacturer. These products also contain leutin, which supports vision, and non?medicinal ingredients, such as dyes, for product stability.
Vitamin A is used to treat symptoms of deficiency in this vitamin, which can occur in people with diabetes, liver disease and protein deficiency, notes WebMD. The vitamin is also possibly effective for reducing the risk of developing breast cancer and cataracts. Vitamin A can be unsafe if taken in large doses, as it may increase the risk of osteoporosis. Those who take supplements with vitamin A in large amounts for a long time can experience side effects such as fatigue, nausea and excessive sweating.
Beta-carotene is in a group of pigments called carotenoids, which provide about 50 percent of the recommended vitamin A in a person's diet, explains WebMD. It is effective for treating sun sensitivity in certain individuals and may be effective for treating eye diseases, asthma attacks and osteoarthritis. Taking too much of the carotenoid can turn skin orange and may have other possible side effects.
Calcium is used to treat conditions caused by calcium deficiencies, such as bone loss and hypoparathyroidism, states MedicineNet. Taking calcium supplements can cause side effects such as constipation and upset stomach. To avoid side effects, it's best to take supplements with calcium as written on the product package or under the supervision of a doctor.