Vitamin toxicity is common.

That means some supplement products may not contain what the label says.

What Are Vitamins?

A mix of vitamin capsules, tablets, and gel caps

Verywell / Anastasia Tretiak

Vitamins are a group of essential nutrients vital to keeping your body healthy.

The right amounts are important to maintain a healthy brain, bones, skin, and blood.

Several vitamins also assist in metabolizing food.

Care should always be taken to use only recommended amounts of supplements.

The amount of vitamin A in a food or supplement is indicated by retinol activity equivalents (RAE).

Plant-derived beta-carotene, a provitamin A found in carrots, is metabolized differently than preformed vitamin A.

It is not found to be responsible for any of the serious symptoms of vitamin A toxicity.

These may increase the risk of toxicity when taken together with vitamin A supplements.

B Vitamins

Most of theB vitaminsare important for metabolism.

They’re important fo skin, hair, brain, and muscle health.

The recommended daily amount for adults is 1.2 milligrams (mg) for men and 1.1 mg for women.

Vitamin B1 is not known to be toxic in high doses.

It is important for metabolizing glucose and delivering energy to the cells.

The recommended daily amount for adults is 1.3 mg for men and 1.1 mg for women.

Vitamin B2 has not been shown to be toxic in high doses.

It leaves the body quickly when you urinate and there is no known upper limit for dosage.

The recommended daily amount for adults is 16 mg for men and 14 mg for women.

see to it to check your cholesterol levels after 3060 days of a niacin (B3) protocol.

High one-time doses of vitamin B3 are not known to be toxic.

However, B3 should not be taken if you have gout as it can increase uric acid levels.

B3 may also worsen peptic ulcer disease.

Prolonged overuse of vitamin B3 can cause liver damage, particularly in people with preexisting liver disease.

However, some research suggests it can pose a risk to the developing fetus during pregnancy.

Higher doses also may worsen symptoms of Alzheimer’s disease in older adults.

The recommended daily amount is 1.3 mg2 mg for adults.

The recommended daily amount for adults is 30 mcg.

It is found in citrus and leafy greens.

The recommended daily amount for adults is 400 mcg.

Pregnant people should get 600 mcg, and people who are lactating should get 500 mcg daily.

Folic acid is not generally toxic in high doses, but it can obscure symptoms ofpernicious anemia.

The recommended daily amount for adults is 2.4 mcg.

Vitamin B12 has not been shown to be toxic in high doses.

With vitamin B5, some people may experience diarrhea.

Extreme doses of vitamin B6 can cause neurological symptoms like numbness and tingling in the extremities.

Taking too much may cause loss of coordination, skin lesions, and disrupted digestion.

It is found naturally in citrus fruit, potatoes, peppers, and greens, and invitamin C supplements.

The recommended daily amount for adults is 90 mg for men and 75 mg for women.

Vitamin D

Vitamin D, also known as calciferol, assists calcium absorption and bone-building.

Vitamin D is therefore added to foods such as fortified milk, juice, and cereal.

Some people may need to take avitamin D supplementto get enough.

It is found in fish, vegetable oil, nuts, seeds, wheat, and leafy vegetables.

It also may contribute to the risk of bleeding when taking other medications.

Talk to your healthcare provider about taking it while receiving cancer treatment.

It is found in milk, soy oil, and leafy greens.

Supplements are not generally needed except in situations in which absorption is decreased.

The recommended daily amount for adults is 120 mcg for men and 90 mcg for women.

Treatment

Vitamin toxicity diagnosis and treatment will depend on the specific key in.

They may need to change your medications or take other measures, too.

Summary

Many vitamins pose no threat to your health, even at very high doses.

In rare cases, the toxicity may be life-threatening.

Vitamins also can cause toxicity with an excessive single dose.

If you are concerned about vitamin toxicity, speak with your healthcare provider about your use of vitamin supplements.

They can identify associated symptoms, provide appropriate blood testing, and offer treatment if needed.

National Capital Poison Center.National Poison Control Call Statistics, 2021.

Schuh MJ, Mustain K, Crosby S.Phenytoin Toxicity with High Dose, Concomitant Ascorbic Acid Dosing.Innov Pharm.

2022 Dec 26;13(4):10.24926/iip.v13i4.5122.

National Institutes of Health Office of Dietary Supplements.Vitamin A and Carotenoids.

2021 May 18;13(5):1703. doi:10.3390/nu13051703.

Drugs and Lactation Database (LactMed) [Internet].

Bethesda (MD): National Institute of Child Health and Human Development; 2006.Orlistat.

2021

National Institutes of Health Office of Dietary Supplements.Thiamin fact sheet for health professionals.

National Institutes of Health Office of Dietary Supplements.Riboflavin.

National Institutes of Health Office of Dietary Supplements.Niacin fact sheet for health professionals.

2022 Sep 22;14(19):3940. doi: 10.3390/nu14193940.

National Institutes of Health Office of Dietary Supplements.Vitamin C fact sheet for health professionals.

MedlinePlus.Hypervitaminosis D.

National Institutes of Health Office of Dietary Supplements.Vitamin E Fact Sheet for Health Professionals.

National Institutes of Health Office of Dietary Supplements.Vitamin K Fact Sheet for Health Professionals.

National Institutes of Health Office of Dietary Supplements.Vitamin B6 fact sheet for health professionals.

Merck Manual Professional Version.Vitamin A Toxicity.

National Capital Poison Center.Never induce vomiting if a child swallows a poison.

Harvard Health Publishing.Listing of vitamins.

National Institutes of Health Office of Dietary Supplements.Vitamin A fact sheet for health professionals.