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  1. Vitamin B-12 - Mayo Clinic

    Aug 13, 2025 · Know the causes of a vitamin B-12 deficiency and when use of this supplement is recommended.

  2. Vitamin D - Mayo Clinic

    Mar 21, 2025 · 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 …

  3. Calcium and calcium supplements: Achieving the right balance

    Nov 1, 2022 · Considering calcium supplements? First figure out how much calcium you need. Then weigh the pros and cons of supplements.

  4. Biotin (oral route) - Side effects & dosage - Mayo Clinic

    Nov 1, 2025 · Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons. RDAs for a given …

  5. Water: How much should you drink every day? - Mayo Clinic

    Oct 12, 2022 · No single formula fits everyone. But knowing more about your body's need for fluids will help you estimate how much water to drink each day.

  6. Vitamin B-6 - Mayo Clinic

    Aug 13, 2025 · Understand when a vitamin B-6 deficiency might occur and learn the risks of taking too much of this vitamin supplement.

  7. Vitamin C - Mayo Clinic

    Aug 14, 2025 · Vitamin C is an essential nutrient found in foods and available as a supplement you take by mouth. Learn about its potential benefits and the causes of vitamin C deficiency.

  8. Caffeine: How much is too much? - Mayo Clinic

    Feb 21, 2025 · Is caffeine causing you problems? Find out how much is too much and if you need to cut down.

  9. What’s the difference between “come recommended” and “be …

    Note that recommended has two distinct meanings, as covered by this earlier question. In OP's context, if the customer were to be recommended, that could either mean that he was advised …

  10. Too much vitamin C: Is it harmful? - Mayo Clinic

    Feb 20, 2025 · Vitamin C is an essential nutrient, but you can get too much of it. If you're an adult, limit yourself to no more than 2,000 milligrams (mg) of vitamin C a day. The recommended …