The fat-soluble vitamins you'll typically see labeled with IU, and their recommended daily intake for adults, is:. Other vitamins, such as vitamin C , are measured in milligrams, or mg, because they don't require the additional standardization imposed by the IU unit.
Vitamins that are usually present or consumed in very small quantities, such as vitamin B12, are measured in micrograms. As Dr. William C. Shiel Jr. But, every once in a while, you might find yourself in a position to convert between the IU measurement and milligrams, micrograms or grams. To make those calculations, you need to know which form of the vitamin you're dealing with and the appropriate conversion factor.
If you're converting from IU to weight mcg, mg or g , you'll divide by the conversion factor. If you're converting from weight to IU, you'll multiply by the conversion factor.
For example, if you're dealing with vitamin A as retinol, the appropriate conversion factor is 3. If you have 8, IU of vitamin A and want to know what that is in weight, you'd use a table or an online search to look up the appropriate conversion factor 3. You should consider taking a daily supplement containing 10 micrograms of vitamin D throughout the year. The Department of Health and Social Care recommends that babies from birth to 1 year of age should have a daily supplement containing 8.
Children aged 1 to 4 years old should be given a daily supplement containing 10 micrograms of vitamin D throughout the year. You can buy vitamin D supplements or vitamin drops containing vitamin D for under 5s at most pharmacies and supermarkets. Women and children who qualify for the Healthy Start scheme can get free supplements containing vitamin D.
See the Healthy Start website for more information. Taking too many vitamin D supplements over a long period of time can cause too much calcium to build up in the body hypercalcaemia. This can weaken the bones and damage the kidneys and the heart. If you choose to take vitamin D supplements, 10 micrograms a day will be enough for most people.
To determine if there is a "dose response," researchers examined different doses of vitamin E supplements and risk of death from any cause. They studied death rates in published clinical trials comparing vitamin E supplementation to placebo and included findings from 14 studies, from to Miller, M.
According to the analysis, there is no increased risk of death with a dose of IU per day or less, and there may even be some benefit. However, an increased risk was found at amounts above IU per day and significant risk of death was found starting at IU a day. Those who take greater than IU of vitamin E a day are about 10 percent more likely to die than those who do not, researchers said. The confusion for many, said Miller, is that some doctors have recommended vitamin E supplementation based on studies suggesting that it is beneficial for specific illnesses.
One study in people with a history of prior heart attack showed that vitamin E use correlated with a lower risk of having a second event. In another trial, patients with end-stage kidney disease seemed to benefit. Mcg and ug are the same. The conversion of IU to mg varies depending on the nutrient.
Please remember that 'more' isn't necessarily better in nutrition. Many nutrients are only required in microgram amounts and taking larger amounts could be unnecessary or even detrimental to health.
0コメント