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What Makes a Good Multivitamin?

Know Your Options to Best Support Health
What Makes a Good Multivitamin?
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Multiples are available as a powder inside a shell capsule, as a liquid inside a soft-gelatin capsule, or hard-pressed as tablets that may be chewed or swallowed
Designed for people whose diets don’t meet all their nutritional needs, multiple vitamin–mineral supplements (“multivitamins”) are convenient nutrient combinations, usually taken one to six times per day. While it’s generally agreed that a healthy diet is the best foundation for health, everyday life makes that goal challenging for many people. So, some people supplement in hope of preventing disease-causing deficiencies and providing higher nutrient amounts than they can get through diet alone, which may help prevent or manage certain diseases.

Who decides how much is enough?

In the US, official Recommended Dietary Allowance (RDA) recommendations were developed by a government-appointed panel in the 1940s to broadly cover healthy people of any age or gender. Used to design mass food programs, such as for the armed forces and food relief/ration programs, RDA’s were the basis for the Reference Daily Intake (RDI) values, which the US Food and Drug Administration (FDA) uses to create the Daily Value (DV) packaging labels.

Many multivitamins contain at least 100% of RDA recommendations. However, decades of research on human nutrition have led many researchers and healthcare professionals to conclude that a “one-size-fits-all” approach does not address the increased need for certain nutrients by certain groups, such as calcium for children, vitamin C for smokers, or vitamin D for seniors. Though sometimes inconclusive, abundant research still suggests therapeutic benefits to supplementing with certain nutrients, even when eating a healthful diet.

For a list of the recommended optimal amounts of each nutrient, go to a Healthy Person's Guide to Vitamins & Minerals.

What’s the best multivitamin for me?

Multiples are available as a powder inside a hard-shell pull-apart capsule, as a liquid inside a soft-gelatin capsule, or hard-pressed as tablets that may be chewed or swallowed. Common products on the market include:

  • Low-potency/one-a-day multiples: These mixtures often contain 100% of the vitamins and minerals many people require, though not enough to make up for deficiencies or other therapeutic amounts. For example, people eating a Western diet may be deficient in minerals such as calcium and magnesium, which one-a-days may not help correct.[REF1 from V&M]
  • High-potency multiples: These mixtures may provide higher amounts of desired nutrients sometimes designed to support particular health goals, such as heart health. To evenly distribute nutrition to the body, these are sometimes optimally taken two to six times per day in divided doses.
  • Timed-release: Theoretically, releasing vitamins and minerals slowly into the body over a period of time is better than releasing them all at once. However, except for some studies showing better absorption of time-released vitamin C, this assumption has not been well studied and some concerns have been raised about the safety of the chemical agents used to cause the timed-release (though they have not well researched).
  • Vegetarian: Most capsules are made from animal gelatin, so vegetarians need to carefully read supplement labels to ensure they are getting a vegetarian product.

What’s the best way to take a multi?

The best time to take most supplements is with meals, to avoid stomach upset they sometimes cause and to help the body better absorb the nutrients.

  • Capsules vs. tablets: Occasionally B vitamins react with a product’s other ingredients, especially when exposed to moisture or heat; this can cause discoloration and a bad smell. While the multiple is still safe and effective, the smell is off-putting and usually not very well tolerated. Liquid multiples in a soft-gel capsule—or tablets or capsules that are kept dry and cool—do not have this problem. Capsules are usually not as large as tablets, so some people find them easier to swallow. Properly made tablets and capsules will dissolve readily in the stomach, allowing the nutrients to be absorbed.
  • Chewables: Multiples do not taste very good and to make them palatable to both children and adults, bad-tasting ingredients are reduced or eliminated and the rest are masked with a sweetener (sometimes more sweetener than any other ingredient). Debates continue, but healthcare professionals generally recommend avoiding regular consumption of both artificial sweeteners like aspartame (NutraSweet®) and sugars. (Xylitol, a natural sugar, does not cause tooth decay or other known problems but is rarely used in chewables because it is relatively expensive.) Chewable vitamin C products should contain buffered vitamin C, rather than the acidic form (ascorbic acid), to avoid damaging tooth enamel.

Does a multiple ensure good nutrition?

Nothing beats a nutrient-rich, whole foods diet to as a foundation for good nutrition, and quality supplements may help support that goal. However, there is some speculation that the nutrients found in a multiple are better utilized if taken separately, as certain nutrients compete with each other for absorption, whether in food or supplements. For example, magnesium, zinc, and calcium compete; copper and zinc also compete. However, the body is designed to cope with this competition and it is less likely to be a problem if nutrition is derived from several sources and supplementation is spread out over the day.

Are multiples good for kids?

While a whole food diet is the preferable route, a high-quality multivitamin might be recommended for children eating an unbalanced diet. In one double-blind trial, schoolchildren received a daily low-potency vitamin-mineral tablet for three months that contained 50% of the USRDA for most essential vitamins and the minerals. About 20% of participants (working class, primarily Hispanic, children, aged 6 to 12) experienced dramatic gains in certain measures of IQ, possibly due to correction of specific nutrient deficiencies found in these children. However, it was not possible in this study to identify which nutrients caused the improvement.



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eVitamins is a registered trademark of eVitamins, LLC. Statements made about specific vitamins, supplements, procedures or other items sold on or through this website have not been evaluated by eVitamins or by the United States Food and Drug Administration. They are not intended to diagnose, treat, cure or prevent disease. The information provided on this site is for informational purposes only. As always, please consult with a licensed doctor or physician before starting any diet, exercise or supplement program, before taking any vitamin or medication, or if you have or suspect you might have a problem.

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