This may seem contradictory because vitamins are often encouraged to supplement nutrients that may be lacking in our diets. Physicians or nutritionists may suggest vitamins once it is confirmed that you have a nutrient deficiency and highly advise that the daily recommended doses are followed. Vitamin overdose occurs when a person ingests far more than the daily recommendation, for an extended period of time.
High doses of vitamin E supplements can prevent the clotting of blood, thus resulting in hemorrhage. Vitamin B comprises of vitamin B1 thiamine , vitamin B2 riboflavin , vitamin B3 niacin , vitamin B5 pantothenic acid , vitamin B6 pyridoxine , vitamin B9 folate , vitamin B7 biotin and vitamin B12 cobalamin.
Consumption of 1 to 3 grams of nicotinic acid a form of niacin per day can result in high blood pressure, abdominal pain, disturbed vision and even liver damage.
Prolonged consumption of around 1 to 6 grams of vitamin B6 every day can cause nausea, heartburn, sensitivity to light and skin lesions. Excess consumption of folate or folic acid in the form of a supplement can affect mental function and the immune system.
Vitamin C is usually safe but excess of it can cause gastrointestinal problems such as diarrhoea, abdominal cramps, nausea and vomiting. People consuming around 6 grams of vitamin C per day have reported migraine attacks. People with iron storage disorders such as hemochromatosis must consume vitamin C in moderation as it can cause tissue damage and fatal heart abnormalities. Make no mistake, that is a lot of vitamin D! The best way to determine the appropriate amount of vitamin D for you and avoid overdose is to avoid so-called mega-dosing, consult your own healthcare professional, and have your levels tested.
We hear a lot about B vitamins, a group of 8 distinct vitamins, each responsible for aiding various functions in the body. The functions of the vitamin B group range from supporting the rate of metabolism, promotion of healthy skin and hair, as well as memory support. Since the vitamin B group is responsible for all of that good stuff, can you really get too much resulting in a vitamin B overdose? With some of the B vitamins, unfortunately, yes.
In fact, a vitamin B6 overdose can lead to nerve toxicity, while B3 can lead to nausea, jaundice, and liver toxicity. Too much folic acid, too, can mask the symptoms of a B12 deficiency. Typically, mg of B6 is scary territory, while mg of B3 is risky. For folate, the Institute of Medicine recommends adult men and women not consume more than mg per day. In order to avoid a vitamin B overdose, make sure you consult your healthcare professional. Vitamin A supplementation may enable you to delay getting reading glasses since it supports the function of the human eye, but a severe vitamin A overdose can actually cause death.
Normally, a vitamin A overdose progresses slowly as it accumulates in the body, particularly since it is a fat-soluble vitamin and is stored in your fat cells. The initial signs of a vitamin A overdose may emerge as rather benign health issues: dry, rough skin, cracked lips, and hair loss.
Latter symptoms of vitamin A overdose may include irritability, headache, high level of liver enzyme in blood, and liver disease. In addition to a slow progressing vitamin A overdose, there is such a thing as an acute vitamin A overdose.
This is a far more serious type of vitamin overdose with symptoms ranging from vomiting, high pressure in the brain, and even death. The vitamin A recommended daily dose for children 4 to 8 years old is IU and for adults is 10, IU.
Staying within these limits is advised, but it is best to check with your healthcare professional to determine what is best for you. While harmless, it is an important indicator of vitamin B3 toxicity. Prolonged overuse of vitamin B3 can cause liver damage, particularly in people with preexisting liver disease. Vitamin B5, also known as pantothenic acid , is found in chicken, egg yolks, dairy, whole grains, legumes, mushrooms, kale, cabbage, and broccoli.
The recommended daily amount for adults is 5 mg. Vitamin B5 has not been shown to be toxic in high doses, but in extreme doses may cause diarrhea. Vitamin B6 is a group of compounds related to pyridoxine, which is found in poultry, pork, fish, whole grains, legumes, and blueberries.
The recommended daily amount is 1. Supplemental doses over mg per day are not recommended for adults outside of therapeutic applications. Extreme doses of 1, mg—6, mg taken over an extended period of time can negatively affect the brain, creating neurological symptoms like numbness and tingling in the extremities. Taking too much may cause loss of coordination, skin lesions, and disrupted digestion. The symptoms usually resolve when the vitamin supplements are discontinued. Vitamin B7, also known as biotin , is found in liver, pork, eggs, dairy, banana, sweet potato, and nuts.
The recommended daily amount for adults is 30 mcg. Vitamin B7 has not been shown to be toxic in high doses.
Vitamin B9, commonly known as folate or folic acid , is important for new cell production as well as early brain and spine development of a fetus during pregnancy. It is found in citrus and leafy greens. The recommended daily amount for adults is mcg. Pregnant people should get mcg, and people who are lactating should get mcg daily. Folic acid is not generally toxic in high doses, but it can obscure symptoms of pernicious anemia. Vitamin B12 , also known as cobalamin, is found in dairy, eggs, fish, poultry, and meat.
The recommended daily amount for adults is 2. Vitamin B12 has not been shown to be toxic in high doses. Vitamin C , also known as ascorbic acid, is used by the body as an antioxidant to prevent damage to cells and also for the growth and repair of tissues in the body. It is found in citrus fruit, potatoes, peppers, and greens. The recommended daily amount for adults is 90 mg for men and 75 mg for women.
Vitamin C is not normally considered toxic, but large doses of 2, mg per day can affect digestion, causing diarrhea, cramps, and nausea. Vitamin D, also known as calciferol, assists calcium absorption and bone building. Pre-vitamin D can be produced in the skin, but with more people spending the majority of their time indoors or living at latitudes with seasonally reduced sun, sunlit skin alone may not provide all the vitamin D needed.
Vitamin D is therefore found in many foods such as fortified milk, fortified juice, cereal, and fish and is available as a supplement. The recommended daily amount for adults 31 to 70 years old is 15 mcg IU and 20 mcg IU for adults 71 and older. If you take mcg 10, IU or more of vitamin D supplements daily, you risk vitamin D toxicity, leading to abnormally high levels of calcium in the blood.
Symptoms may include kidney stones, nausea, recurrent vomiting, constipation, excessive thirst, excessive urination, confusion and weight loss. Taking high doses has also been linked to cancer risk, heart problems, and an increased risk of bone fractures.
Diagnosis may be done by blood and urine tests for calcium, vitamin D, and phosphorus. For treatment, stopping vitamin D intake is recommended, but other treatments may be needed in severe cases. It is found in fish, vegetable oil, nuts, seeds, wheat, and leafy vegetables.
The recommended daily amount for adults is 15 mg. Daily use of mg or more from supplements may increase the risks of prostate cancer in men, stroke, and hemorrhages. Vitamin K, also known as phylloquinone and menadione, is a fat-soluble vitamin important for blood clotting. It is found in milk, soy oil, and leafy greens. Supplements are not generally needed except in situations in which absorption is decreased.
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