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Seek emergency medical attention if you think you have used too much of multivitamins. An overdose of vitamins A, D, E, or K can cause serious or life-threatening side effects. Certain minerals contained in a multivitamin may also cause serious overdose symptoms if you take too much.
This article discusses whether you should be concerned about taking multivitamins. It reviews the potential side effects of multivitamins and which ingredients may cause them.
Learn about the side effects of multivitamin, from common to rare, for consumers and healthcare professionals.
Vitamin B-3 (niacin) — High doses can help lower high cholesterol levels, but this should be done only under the supervision of a doctor. Side effects, including severe liver disease, can occur. Iron — In healthy men and postmenopausal women, iron deficiency is rare.
Taking multivitamins every day may cause uncomfortable gastrointestinal side effects or put you at risk for some nutrient toxicities. They also can interfere with certain medications. Always consult a healthcare provider before starting a new supplement regimen.
Multivitamins containing doses of vitamins and minerals that are similar to recommended daily intakes are probably safe for most people. But supplements, such as megavitamins, containing larger amounts than those recommended can have unwanted effects and can even be harmful.
Multivitamins aren't without risks. Discover common multivitamin side effects, like GI issues, allergic reactions, and nutrient imbalances.
Healthy people who eat right need a multivitamin only if they have a diagnosed vitamin or mineral deficiency. Still, multivitamins may provide a safety net to fill dietary nutrition gaps. Some people also view taking a daily multivitamin as another way to support a healthy lifestyle.
What are some effects of MVMs on health? Here are some examples of what research has shown about taking MVMs to increase nutrient intakes, improve health, and reduce the risk of disease.
Still, taking high-dose niacin supplements can cause side effects, including: Abdominal pain, heartburn and nausea. Blurred vision. Hypotension (low blood pressure), which can lead to fainting or ...