An overdose of this vitamin can lead to problems with confusion, hair loss, liver damage and bone loss. It can also cause an increased risk for death and lung-associated issues for those who have a history of smoking—particularly female smokers. Vitamin E is a fat-soluble nutrient found naturally in foods and added to some fortified foods that can help protect cells from damage caused by free radicals, such as air pollution.
But taking too much of this supplement can increase your risk for bleeding and bleeding in the brain. But in supplement form, it can induce blood clots, which can lead to heart attacks and strokes, if you take too much.
You may have noticed we left vitamin D off this fat-soluble list, and there is a good reason or two for that. In addition to this, many Americans are actually deficient in the vitamin as well. With cold season, flu season and the COVID pandemic , many people load up on vitamin C and zinc thinking they can fight off—and even prevent illnesses.
Vitamin C is generally safe, but in large doses anything over 2,mg , it can cause diarrhea and nausea. High doses can also result in falsely elevated blood glucose readings , which can be problematic for diabetics. Low blood glucose can cause them to feel shaky, sweaty and can even lead to seizure or a loss of consciousness.
Oral zinc can also cause gastrointestinal problems and a host of other problems if taken long-term, especially in high doses anything over 40mg. High levels of zinc can cause a copper deficiency, taste disturbances, hematologic and neurological effects and may interact with some medications and antibiotics.
Iron and heavy metals. Philadelphia, PA: Elsevier; chap Reviewed by: Jacob L. Editorial team. Multiple vitamin overdose. Poisonous Ingredient Any ingredient in a multiple vitamin supplement can be toxic in large amounts, but the most serious risk comes from iron or calcium. Where Found Many multivitamin supplements are sold over-the-counter without a prescription. Symptoms Below are symptoms of a multivitamin overdose in different parts of the body. Home Care Seek medical help right away.
Before Calling Emergency Have this information ready: Person's age, weight, and condition The name of the product ingredients and strengths, if known Time it was swallowed The amount swallowed. Poison Control Your local poison center can be reached directly by calling the national toll-free Poison Help hotline from anywhere in the United States. What to Expect at the Emergency Room Take the container with you to the hospital, if possible.
The person may receive: Activated charcoal, depending on the vitamin taken Blood and urine tests Breathing support, including oxygen, tube through the mouth into the lungs, and breathing machine ventilator X-rays ECG electrocardiogram, or heart tracing Intravenous IV fluids through a vein Laxatives Medicines to treat symptoms Medicines to remove iron from the body, if needed Blood transfusions exchange transfusions , if needed In severe cases, the person may be admitted to the hospital.
Outlook Prognosis Niacin flush vitamin B3 is uncomfortable, but lasts only 2 to 8 hours. References Aronson JK. ULs for Vitamin C by age:. Taking large amounts of vitamin C isn't life-threatening, but it can cause diarrhea, nausea, and abdominal cramps and has been linked to kidney stones. Vitamin D helps your body absorb and utilize calcium, so if you don't get enough vitamin D you run the risk of weakened bones and osteoporosis, among other things.
Most adults need International Units IU every day. You don't get much vitamin D from food, but your body makes it after your skin is exposed to sunlight. Vitamin D is a popular supplement, but you can get too much if you mega-dose every day. The ULs for Vitamin D by age:. Taking too much vitamin D in the form of supplements can raise your blood levels of calcium, which can be bad for your heart and kidneys. An adult needs about 15 mg per day.
Your body needs vitamin E for normal immune system function, and it also works as an antioxidant and helps prevent blood clots from forming in your blood vessels. It's found in a variety of foods, but mostly in nuts, seeds, and green vegetables.
The average adult needs about 15mg per day. The ULs for Vitamin E by age:. Taking too much vitamin E can increase your risk of bleeding, which is especially important if you're at an increased risk of stroke or take blood-thinning medications. Niacin helps convert the foods you eat into the energy your body needs to do everything you do. Deficiency is rare because it's found in a large variety of foods, but it's also sold as a supplement that's often used to manage cholesterol levels.
The ULs for Niacin by age:. Taking large amounts of niacin can lead to liver damage and affect blood sugar levels in people who have diabetes. Your body needs vitamin B-6 to help convert protein and sugar into energy, and it's essential for the production of hemoglobin and nervous system function. The average adult needs about 1. It's pretty tough to have a B-6 deficiency, so supplementation isn't needed, but, it has been used to reduce homocysteine levels and to help treat depression and carpal tunnel syndrome.
The ULs for Vitamin B-6 by age:. Long-term use of vitamin B-6 supplements can cause nerve damage, skin lesions, nausea, and light sensitivity. Folic acid is a synthetic form of folate , a B-complex vitamin that's essential for making DNA, cell division, and growth. Folate is found in fruits and green vegetables, while folic acid is often used to fortify cereals and bread.
The average adult needs about mcg every day, but it's also sold as a dietary supplement. The ULs for Folic Acid by age:. Taking large amounts of folic acid may mask a vitamin B deficiency that can lead to nerve damage. It's also possible that large amounts of folic acid might increase the risk of colorectal cancer. Choline is a B-complex vitamin that your body needs for several biological processes and you need it to produce a brain chemical called acetylcholine.
The average adult needs around mg per day. The ULs for Choline by age:.
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