How much Vitamin D do you need?

[Guest guest]

How much Vitamin D do you need?Summary of dosing suggestions http://www.vitamind3world.com/How_Much_Needed.htmlAmerican Academy of Pediatrics recommends 400IU starting soon after birth and continuing through childhood and adolescence.1000IU per day is the minimum dose that can be expected to significantly raise an adults Vitamin D level and is the current recommendation of the Canadian Cancer Society. 1000IU per day is considered conservative by experts in the field. Most experts suggest 2000 IU is appropriate and safe. (19)For older, obese, dark skinned or people who get very little sunshine, 2000IU is the appropriate dose. (19)The Vitamin D council suggests taking 5,000 IU per day for three months, then obtain a 25-hydroxyvitamin D test. Adjust your dosage so that blood levels are between 50–80 ng/mL (or 125–200 nM/L) year-roundWomen who are pregnant or breast feeding should consider increasing their Vitamin D intake to 2000IU according to the Canadian Pediatric Society. (Press Release)Is it worth having a vitamin D test before starting taking supplements? Most suggest not because almost everyone living in Northern areas are at least not at optimal levels and most are close to absolute deficiency. Most suggest having the first test several months after starting supplementation to determine if your levels is high enough and then makeing dosing modifciations.However beware that not all preparations of Vitamin D sold are pure vitamin D3. One of the commonest sources of vitamin D for commercial supplies is cod liver oil and this also contains high levels of Vitamin A. Vitamin A antagonizes and can effectively cancel out the effects of Vitamin D. Therefore products that contain both A and D should be avoided. For the same reason cod liver oil should be avoided. (1)The Canadian Cancer Society now recommends that all Canadians take at least 1000IU Vitamin D3 per day. This recommendation is something of a turning point in medicine. It is the first time any official medical institution has recognized that a simple dietary supplement may influence the incidence of cancer.However many studies have shown that 1000IU is far from ideal if one is to bring levels up to the optimal needed for cancer prevention. (1)The upper limit proposed by the Institute of Medicine’s Food and Nutrition Board in the USA in 1977 is 2000IU per day. However even this is based on old and many believe old and inappropriate literature (17)In one study 104 Vitamin D deficient Afro-American patients were treated with 2000IU for one year. At the end of the treatment period 40% had failed to reach a target level of 32ng/ml. (18) In another study 4000IU given for at least six months managed to achieve levels of 44ng/ml (19)Dr Heaney at the Creighton University Medical Center in Omaha Nebraska, one of the worlds leading authorities on vitamin D recommends that adults should take 5000IU per day to achieve optimal levels (19) This is also the suggestion of the vitamin D council in the US who state that if you regularly avoid sunlight exposure you may need as much as 5000IU per day.Dr Cannell of the Vitamin D council in USA recommends 5000IU per day during the fall and winter, and 2000IU per day during the rest of the year. You should consult with your physician and if possible have your vitamin D levels measured. What Blood level of vitamin D is Optimal?People who work out of doors in sunny parts of the world have levels of vitamin D in the 50-70ng/ml range. Sunlight alone cannot produce toxic levels of vitamin D as the body starts to destroy the excess. It would therefore appear that nature/evolution has determined that 50-70ng/ml is the optimal level. (12)Patients are classified as deficient when levels drop below 15ng/ml. (Some consider 20ng/ml to be the cut off) (1)Multiple epidemiological studies have suggested that levels between 33-52ng/ml are necessary to achieve significant reductions in the incidence of the most common forms of cancer. (14, 15)Finally Lappe’s cancer prevention study (see section on Cancer Prevention) showed that levels above 29-38ng/ml were associated with marked reductions in the incidence of cancer. (16)

[Guest guest]

Have we forgotten the balancing effect of vitamin A? Is unopposed vitamin D via supplements just a prelude to another attack by the medical community showing damages caused by vitamin D via supplements since the medicos will be using synthetic D2 instead of D3? Is not this what happened in the (synthetic)betacarotene studies that showed batacaroten to be dangerous and led to the false conclusion that vitamin A is dangerous?

 

Those who disregard past history are damned to repeat it. Myself? I will take vitamin D when I get no sun but will always take compensatory vitamin A with it. If I take 4000 IU of D I will compensate with 20,000 IU of real vitamin A (not betacarotene). I will prefer to get my carotenes from my vegetables.

 

--- On Mon, 3/16/09, M.M. <MedResearch121 wrote:

M.M. <MedResearch121 How much Vitamin D do you need?" @" , " MedicalConspiracies@googlegro" <MedicalConspiracies (AT) googl (DOT) com>Monday, March 16, 2009, 12:20 AM

 

How much Vitamin D do you need?

 

Summary of dosing suggestions

 

http://www.vitamind3world.com/How_Much_Needed.html

 

 

 

 

American Academy of Pediatrics recommends 400IU starting soon after birth and continuing through childhood and adolescence..

 

 

 

1000IU per day is the minimum dose that can be expected to significantly raise an adults Vitamin D level and is the current recommendation of the Canadian Cancer Society.

 

 

 

1000IU per day is considered conservative by experts in the field. Most experts suggest 2000 IU is appropriate and safe. (19)

 

 

 

For older, obese, dark skinned or people who get very little sunshine, 2000IU is the appropriate dose. (19)

 

 

 

The Vitamin D council suggests taking 5,000 IU per day for three months, then obtain a 25-hydroxyvitamin D test. Adjust your dosage so that blood levels are between 50–80 ng/mL (or 125–200 nM/L) year-round

 

 

 

Women who are pregnant or breast feeding should consider increasing their Vitamin D intake to 2000IU according to the Canadian Pediatric Society. (Press Release)

 

Is it worth having a vitamin D test before starting taking supplements? Most suggest not because almost everyone living in Northern areas are at least not at optimal levels and most are close to absolute deficiency. Most suggest having the first test several months after starting supplementation to determine if your levels is high enough and then makeing dosing modifciations.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

However beware that not all preparations of Vitamin D sold are pure vitamin D3. One of the commonest sources of vitamin D for commercial supplies is cod liver oil and this also contains high levels of Vitamin A. Vitamin A antagonizes and can effectively cancel out the effects of Vitamin D. Therefore products that contain both A and D should be avoided. For the same reason cod liver oil should be avoided. (1)

 

The Canadian Cancer Society now recommends that all Canadians take at least 1000IU Vitamin D3 per day. This recommendation is something of a turning point in medicine. It is the first time any official medical institution has recognized that a simple dietary supplement may influence the incidence of cancer.

 

However many studies have shown that 1000IU is far from ideal if one is to bring levels up to the optimal needed for cancer prevention. (1)

 

The upper limit proposed by the Institute of Medicine’s Food and Nutrition Board in the USA in 1977 is 2000IU per day. However even this is based on old and many believe old and inappropriate literature (17)

 

In one study 104 Vitamin D deficient Afro-American patients were treated with 2000IU for one year. At the end of the treatment period 40% had failed to reach a target level of 32ng/ml. (18)

 

In another study 4000IU given for at least six months managed to achieve levels of 44ng/ml (19)

 

Dr Heaney at the Creighton University Medical Center in Omaha Nebraska, one of the worlds leading authorities on vitamin D recommends that adults should take 5000IU per day to achieve optimal levels (19) This is also the suggestion of the vitamin D council in the US who state that if you regularly avoid sunlight exposure you may need as much as 5000IU per day.

 

Dr Cannell of the Vitamin D council in USA recommends 5000IU per day during the fall and winter, and 2000IU per day during the rest of the year.

 

You should consult with your physician and if possible have your vitamin D levels measured.

What Blood level of vitamin D is Optimal?

People who work out of doors in sunny parts of the world have levels of vitamin D in the 50-70ng/ml range. Sunlight alone cannot produce toxic levels of vitamin D as the body starts to destroy the excess. It would therefore appear that nature/evolution has determined that 50-70ng/ml is the optimal level. (12)

 

Patients are classified as deficient when levels drop below 15ng/ml. (Some consider 20ng/ml to be the cut off) (1)

 

Multiple epidemiological studies have suggested that levels between 33-52ng/ml are necessary to achieve significant reductions in the incidence of the most common forms of cancer. (14, 15)

 

Finally Lappe’s cancer prevention study (see section on Cancer Prevention) showed that levels above 29-38ng/ml were associated with marked reductions in the incidence of cancer. (16)