How much water should you drink each day? It's a simple question with no easy answer. Studies have recommended drinking different amounts over the years.

Understanding the Context

But how much water a body needs may be different for each person. It depends on many things, including your health, age, how active you are, where ... Check food and supplement labels to find out how much total calcium you're getting each day and whether you're reaching or going over the recommended daily total. Dietary calcium is generally safe, but there are risks if you take too much, especially in supplement form.

Key Insights

When taken at recommended doses, vitamin B-12 supplements are generally considered safe. The recommended daily amount of vitamin B-12 for adults is 2.4 mcg and 10 to 12 mcg for older adults. A simple blood test can check the levels of this vitamin in your blood. Taking a vitamin D supplement or a multivitamin with vitamin D may help improve bone health. The recommended daily amount of vitamin D is 400 international units (IU) for children up to age 12 months, 600 IU for people ages 1 to 70 years, and 800 IU for people over 70 years.

Final Thoughts

The recommended daily amount of vitamin C is 90 milligrams for adult men and 75 milligrams for adult women. If you take vitamin C for its antioxidant effects, the supplement might not be as good for you as natural vitamin C that's in food. Vaccines can protect your health. Find out more about the vaccines that are recommended for adults. Children—Use is not recommended. For treatment of erectile dysfunction and benign prostatic hyperplasia (daily use): Adults—5 milligrams (mg) once a day, taken at the same time each day, without regard for the timing of sexual activity.

Children—Use is not recommended. For treatment of pulmonary arterial hypertension: