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How much of a vitamin is too much?

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"Most people think it's fine to take as much as they want," says Rosenbloom. "I know people who take 10,000 mg a day." However, the upper tolerable limit is 2,000 mg a day. "People at risk for kidney stones can increase that risk; people also can get diarrhea.


What percent vitamin A is too much?

The tolerable upper intake of 3,000 mcg of preformed vitamin A, more than three times the current recommended daily level, is thought to be safe. However, there is some evidence that this much preformed vitamin A might increase the risk of bone loss, hip fracture [9-11], or some birth defects.

How do you know if you have too much of a vitamin?

6 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.

Can you get too much of any one of the vitamins?

But routinely getting an overload of vitamins and minerals can hurt you. Too much vitamin C or zinc could cause nausea, diarrhea, and stomach cramps. Too much selenium could lead to hair loss, gastrointestinal upset, fatigue, and mild nerve damage.

What is the maximum amount of vitamins per day?

VITAMINRECOMMENDED AMOUNT (daily RDA* or daily AI**)UPPER LIMIT (UL) per dayASCORBIC ACID (vitamin C)M: 90 mg, W: 75 mg Smokers: Add 35 mg2,000 mgCHOLINEM: 550 mg, W: 425 mg3,500 mgCALCIFEROL (vitamin D)31–70: 15 mcg (600 IU) 71+: 20 mcg (800 IU)50 mcg (2,000 IU)

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