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Originally posted by SlyFox_79
It's the first time I have seen anything like this and it breaks my heart.
Anyone else know anything more?
Scientists once suspected vitamin E and beta-carotene prevented lung cancer after a study showed people who took supplements appeared to have lower cancer incidence.
But a larger, more scientifically rigorous study found 50 milligrams a day of alpha-tocopherol, a form of vitamin E, had no effect on lung cancer incidence. And 20 milligrams of beta-carotene, a precursor of vitamin A, actually increased lung cancer incidence in smokers by 18 percent. Health officials now warn smokers not to take beta-carotene supplements.
"There is no vitamin or mineral supplement proven to reduce the risk of cancer," said Eric Jacobs, a senior epidemiologist and vitamin specialist with the American Cancer Society.
However, many doctors continue to recommend daily multivitamins for general health.
Vitamins are water soluble and fat soluble. The water soluble vitamins like vitamin B and C cannot be stored in the body. The extra intake of these vitamins gets ejected out of the body. But the fat-soluble ones like A, D, E and K are accumulated in the body and cause side effects.
An overdose of vitamin A can lead to hair loss, headaches, yellow pigmentation, blurred vision and liver damage. Consuming doses more than 25,000 IU, which is five times the RDA, can cause all these problems which is considered an overdose.
Symptoms of overdose include low grade fever, dry skin, sore mouth, bleeding gums, drowsiness, diarrhea and severe vomiting. These symptoms disappear on withdrawal of the vitamin.
Consuming more than 400 mg/day, which is 200 times the RDA, can cause difficulty in walking, some neurological disorders and numbness in the mouth and hands.
Though sometime back it was considered to be the cause of kidney stones, new research shows that there is no solid evidence of serious side effects of taking vitamin C. Sometimes taking high doses can cause diarrhea.
It is the only vitamin that is synthesized in the body with the help of UV rays from the sun. Supplementation might be needed in some cases where deficiency is detected. Sometimes vitamin D can cause calcium deposits to buildup and interfere with the functioning of the muscles, including the heart muscle.
There can be an overdose of vitamin D only from supplementation. An overdose of the vitamin may cause hypercalcaemia. Over exposure to the sun can never create an overdose. A dose of 50,000 IUs of supplementation is considered an overdose. RDA is 400 IUs.
Vitamin B3, one of the B complex group vitamin, is also known as Niacin. This vitamin is generally prescribed by doctors to help lower cholesterol. Though doses of 2,000 mg (100 times the RDA) are prescribed for the patients, they should be monitored for any possibility of developing symptoms of jaundice and liver damage.
Symptoms of overdose include faintness, pounding in the head, diarrhea, jaundice and impairment of live function, low levels of glucose tolerance, other skin lesions and abdominal cramps. Most of the effects are reduced on withdrawal of the vitamin.
Since it's almost impossible to eat enough food for vitamin toxicity to occur, the likeliest way too get too much of certain vitamins is by taking excessive quantities of supplements.
What is Considered Excessive?
Currently there is no clear definition of what constitutes excessive when it comes to vitamins. However, the general consensus is that excessive is considered to be several times the RDA (Recommended Dietary Allowance) or more than the Tolerable Upper Intake Level (UL) set by the Institute of Medicine.
Read more at Suite101: Effects of Excessive Vitamin Intake: Risks Associated with Large Doses of A, B6, C, D and E Supplements vitamins-minerals.suite101.com...
A balanced diet that includes a wide variety of the main food groups generaly provides all the vitamins and minerals that your body needs. There are currently 13 vitamins and minerals.