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Understanding the Context

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. But how much water a body needs may be different for each person.

Key Insights

It depends on many things, including your health, age, how active you are, where ... 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. 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. 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.

Final Thoughts

Dietary calcium is generally safe, but there are risks if you take too much, especially in supplement form.