Yes, it will be interesting to see "how" the vitamin D amounts are changed based on research. Remember---when recommendations are made, it is not based on just 1 study. The committee of scientists look at all the published studies. And sometimes studies are removed because of poor research techniques. Also recommendations are made for the "general population".
Currently these are the latest recommendations as of 2011 publication (see link below). These are the recommendations used at Sparkpeople for the general population. And since Sparkpeople, our experts and our members are not qualified to assess medical need;----then we ask that our members follow these guidelines as well. For more specific information, we refer back to one's doctor who is qualified to manage medical care.
There have recently been a lot of studies coming out about this. He did not provide me a link, but a quick google search comes up with multiple studies that say the 400-600 IU is just simply too low to provide any benefits. Which makes sense to me seeing that most supplements of vitamin D3 are upwards of 1000 - 5000 IU. There are a few current studies that say they will be done within 3 years (they started at the beginning of the year) having people take 400 IU, 4,000 IU, and 10,000 IU. They believe 400 is way too low, 10,000 is the high, and 4,000 is about the average range for adults.
From a resent study I read, it states that in Canada they take 800 - 2,000 IU, so even the 600 is low to them.
" If you have not taken a vitamin D blood test and you’re looking for general guidelines, Holick suggests that children take 1,000 to 2,000 IU and adults take 2,000 to 3,000 IU daily. “The bottom line for me is that there is probably no evidence that these amounts pose any risk,” he says. Cannell’s recommendation: Don’t drive yourself crazy with all the qualifications. “Just take 5,000 IU a day, unless you’re going outside to work or to the garden or beach.” The higher amount might be particularly helpful for people with a chronic illness, such as fibromyalgia, arthritis or lupus, adds Hunninghake. “These high doses of vitamin D, while generally safe, should be monitored with follow-up blood level [tests],” he says." experiencelife.com/article/the-vitamin-d-d ebate/
That is all I had time to post now, seeing as I am at work, but as you can see, there are multiple studies happening. Some think that the low dose of vitamin D is a plot by the cancer industry to make sure they still have patients with bone cancer. I'm not saying I believe this, but stranger things have happened.
I am not sure where the doctor got the information to base vitamin D need on weight. Or to say that everyone needs 8000 IU??? Did he provide a government link or a study?
For the general population, the amounts from the Food and Nutrition Board, The Institute of Medicine, The National Academies is the standard that is used. That is what is provided in the link I shared.
Did your doctor say where the information was obtained?
This link provides the up to date, vitamin D recommendations for healthy adults. It also provides information on disease conditions related to vitamin D. A great amount of research regarding vitamin D is currently happening. When these studies are completed, the studies will be analyzed and based on the evidence new recommendations will occur.
To correct some information: While 400 IU is the RDA for vitamin D, 600 IU is the current recommendation for a healthy adult (to age 70--both male and female) Vitamin D intake need is not based on weight.
"The U.S. RDA recommendation for vitamin D is 400 IUs. This dose was recommended to prevent rickets, which works well, but does nothing to give the far more important protection from cancer, heart disease, and infections."
To get the healthy blood levels most adults will need about 8000 units of vitamin D a day. However, the majority of people taking vitamin D are taking 1,000 units, and they think they are taking high doses.
Based on recent studies, the current recommendation is 35 IUs of vitamin D per pound of body weight. But lots of things factor into that, like location, race, etc.
So in short, listen to your doctor. You need the dose she prescribed you. She knows what she is doing. I assume she tested your blood levels. Those don't lie.
For an adult maintaining adequate vitamin D stores, the Tolerable Upper Intake Amount is set at 4000 IU. However, that is not your situation. You were in a deficiency state. You may need a larger, supplemental amount to stay at a healthy level. As the others have said...follow your doctor's advice.
Hi! My vitamin D levels were very low last year, enough for my doctor to say I needed to take 5,000 iu of D3 daily. It's been almost a year and my levels are good. She still said I should continue with that dosis. Is it too much?
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