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  1. Nov 17, 2023 · Vitamin C: diarrhea, nausea, abdominal cramps. Zinc: nausea, gastric distress, vomiting and loss of appetite. Calcium: constipation. If you're planning to take a multivitamin, Mitri recommends looking for nutrients close to 100% of the RDA, as opposed to ones that go way over the RDA.

  2. Apr 1, 2024 · Regarding other supplements, I recommend that adults, especially older adults, take an extra 1,000 international units (IU) of vitamin D daily or every other day (but avoid mega doses). The recommended daily intake of vitamin D for adults ages 50 to 70 is 600 IU and 800 IU for people older than age 70. Standard MVMs have only 400 IU, and ...

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  4. Apr 1, 2024 · A French study of about 13,000 adults between ages 35 and 60 found an improvement in cancer risk and mortality in men, but not women, after 7½ years of daily supplementation.; Another study ...

  5. Dec 8, 2022 · In a summer 2022 nationally representative Consumer Reports survey (PDF) of 3,070 U.S. adults, about half of people said they take multivitamins and 42 percent said they take individual vitamins ...

  6. Nearly half of adults in the U.S. and 70% of older adults ages 71+ take a vitamin; about one-third of them use a comprehensive multivitamin pill. [1] But is this truly a necessity? There are certainly diseases caused by a lack of specific nutrients in the diet.

  7. Jun 15, 2022 · Daily Value (DV). The first thing that you should look at when you read a multivitamin label is the DV. Looking at the label, check to make sure that the multivitamin has close to 100% of the DV ...

  8. Jul 24, 2023 · A prior sub-study found that a daily multivitamin improved thinking and memory — at least when evaluated with cognitive testing completed by phone. For this study, 3,562 participants were willing and able to perform some tests of thinking and memory on a home computer. Half received a multivitamin; the other half received a placebo.

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