Skip to comments.Vitamin D studies 'inconsistant': doctors warn
Posted on 11/30/2010 4:19:27 AM PST by decimon
WASHINGTON (AFP) Vitamin D and calcium have been hailed as a possible antidote for cancer, heart disease and more, but a panel of US and Canadian doctors said Tuesday that the duo's only sure benefit is bone health.
After reviewing about 1,000 studies on the supposed links between low vitamin D levels and higher risk of serious diseases, the panel concluded that they showed inconsistent results, sometimes due to shoddy research methods.
The experts also issued new guidelines -- the first since 1997 -- for North Americans, saying people should take between 700 and 1,300 milligrams of calcium and anywhere from 600 to 800 international units of vitamin D each day.
Most people "probably don't have vitamin D deficiency, that is the first message," said Glenville Jones, a Canadian doctor who was on the 14-member committee for the US-based Institute of Medicine.
"We think there has been an exaggeration of the public's interest in vitamin D deficiency. (People) should be reassured that vitamin D deficiency is quite rare in North Americans at this point in time."
Just by eating a balanced diet and possibly taking a vitamin supplement in the winter, because sun exposure boosts vitamin D levels, most North Americans would have no difficulty meeting the recommended allotment, he said.
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Does it benefits Drs not to use preventative nutrients.....?
Will keep out dosages where they are! Certainly has helped and even the personal Drs have noticed the positive change.
One study states that Northern folks who get a lot of sun in the summer will get enough vitamin D to carry them over the winter.
Personally, there’s no question how much I need vitamin D. I don’t take supplements in the summer - a few days without sun and I’m not feeling so good. A good afternoon in the sun and it’s all reversed. Supplements in the winter is a must.
Shoddy? Shoddy methods? What a crock. Vit D deficiency is a myth? This report sounds shoddy.
Doctors hate supplements...healthy people are BAD for business...
All I know is I heard about taking vitamin D supplements on a podcast about a year ago. I started taking about 3,000 units a day and I’ve not had a single cold or sore throat the entire time. I used to get sick several times a year without the supplement. It’s cheap insurance.
On a scale of 1-100 my vitamin D level tested to a 13. The Dr. told me should be above 30.
I am very low according to my blood work.. I take mega doses of vit D...Mystery to me because I spend lots of outside in the sun all spring and summer..
If your medical grant gig involves vitamin D, I suppose eventually you’ve got to ‘find’ something different than everyone else or there’s little reason for them to fund your next grant.
I wonder how much some of us metabolizes vitamin D more than the average Joe. I’ve been fighting with low calcium in my blood since the thyroid was removed, and I need D to help the calcium I take in.
I’m not surprised. A vast number of studies end up showing what the study authors set out to find in the first place—i.e., they’re biased to begin with.
Anyone eating a balanced diet does not need supplements. Pill popping is a rather new phenomenon—humans certainly did not evolve to require nutritional supplements to survive. The only time such supplements are actually needed is when there is clearly malnutrition. We have a good food supply—most of us have never even seen someone with malnutrition.
As a biochemist, I am very hesitant to put anything into my body that is not food. You either have enough nutrients, or you don’t—consuming 100 or 1000 times your daily needs is not 100 or 1000 times better. It puts stress on your body, because now your liver and kidneys must work extra hard to remove all those excess chemicals (yes, vitamins and minerals are chemicals) from your body. And if the vitamin is fat-soluble, then your body cannot remove it easily, and it can have very deleterious effects by being present for prolonged periods at levels far higher than the body’s needs.
Of course, the nutritional supplement industry is a multi-billion dollar per year business. They have a vested interest in convincing people that more = better. Otherwise, we’d all be satisfied with good, wholesome food the way God and nature intended for us to eat.
What I've discovered about this is...confusing. I've read that vitamin D can be stored, by an adult, for four months, with a half-life of eight weeks. In fat cells, that is.
So how much vitamin D is circulating in the blood when obtained from fat stores? Not that much, as far as I can tell.
I know only what I read here and there so your info may be as good as mine.
They claim there was sometimes shoddy research and I have no trouble in accepting that. There's the good, the bad and the ugly to everything.
I do supplement vitamin D.
I have two questions.
Question 1)How many people have died from a Vitamin D over dose?
Question 2) How many people have died from prescription drugs annually?
If we can adequately define much less obtain a balanced diet. I am dubious. No, not doobious - dubious. ;-)
I take a multi-vitamin/mineral/whatever pill containing no mega-doses. That's so I get at least some of all that good stuff we're supposed to get. I take additional vitamin D because I don't believe we get what we need from either sunlight or diet.
Same here, but I use a combination of Vitamins. Here is what has happened to me in the 3 years I have been doing it.
1) I have not been sick in over 3 years. Not even so much as a cold.
2) I no longer get my annual allergies in the Spring that I use to get every year since I was 12.
3) My eczema is gone.
4) I use to have chest pains. They are all gone.
5) I find myself very energized and alert.
Now a few years back when I told some friends about this. They said I was listening to modern day quacks, and that they were going to see the doctor for anything that comes up. I basically said I would try this, and if things did not improve then see a doctor.
Here is how it ended up. Three years later they are all on endless prescription drugs for all sorts of crap. They look like crap, they are depressed and having all sorts of medical issues. Oh and they still get the annual colds, sinuses, etc... They have spent thousands of dollars and really have not improved. Most are on at least two prescription drugs. Now for me I spend about $200.00 on Vitamins a year. That’s it. LOL!
I'd guess that would be few. But what amounts to an overdose seems to vary by individuals and, from what I've read, some people do overdose. By 'overdose' I mean an amount where the effects become deleterious.
It is also a rather new phenomenon that humans stay indoors because of "warnings" of skin cancer from the Bad Sun. Or they slather themselves in chemicals (all over the body's largest organ) to "prevent" the sun's rays from penetrating skin. . .this absolutely leads to a Vit. D deficiency.
Add to this (recent phenom) the nutritional depletion in just about all of the foods we purchase from the grocery store shelves...soil depletion and better-living-thru-chemistry has turned the food supply into a toxic soup. Think the body doesn't need some extra help through supplementation to overcome the effects?
There's enough clinical and experiential data out there showing the benefits of increased Vit. D supplementation in higher doses than the gov't's RDA of a miniscule 400IU per day.
"Mal"nutrition comes in many forms - not just starving Ethiopian children. . .we see it EVERYDAY in the form of the increase of degenerative disease.
I like what you wrote, but the soil is not rich in minerals like it use to be.
You can check the poison center. That is where it would fall under. I already know the answer to both.
2) Over 100,000 annually.
This is real simple. Follow the money. There is BIG money in pharmaceuticals compared to the Vitamin industry. No comparison what so ever. Look how much the average multi vitamin, or even Vitamin D. Compare that to the average cost of a pharmaceutical drug.
OK....what exactly are you taking and in what quantities? How old are you now? Do you have any "genetic" issues?
I'd really like to know.
We don’t need to define a balanced diet, nor do I think it is possible.
You can tell for yourself whether you are eating properly or not. First of all, your body, if you know how to listen to it, gives signals that direct your food choices.
Obviously, someone who eats only celery every day is not consuming a balanced diet. Someone who eats a variety of foods every day is.
Sure I take the following,
1) Flaxseed Oil ( I purchased it liquid form only and keep it in the fridge)
2) Fish Oil ( Most people do not, but you need to put it in your Fridge)
5) B complex (I know it has B6 in it but not enough)
7) E Multi-Tocopherol (Most stores only sell the Alpha. You also need the Beta, Gamma and Delta Tecopherols too)
9) Orderless Garlic Gel pills
10) Ginkgo Bilba
I take 3/4 of them after my first meal of the day and the remaining 1/4 after my last meal. Time to take all these pills through out the day. Maybe 10 minutes total.
It’s a lot, but many of the foods we eat do not have the proper vitamins and minerals we need. That is another debate. Thus, why I take supplements.
The proof of the pudding is in the eating.
Flu season is coming...... I’m protected with Vitamin D
Regarding the genetics issue. My grandfather was a diabetic. I am not so far.
If I may be so “indelicate”....age?? And gender?
What research I could find surmises that little of the vitamin D stored in fat does not enter the bloodstream during say, weight loss. Rather, the D stored in fat gets excreted in the bile, and is gone.
That’s the theory, anyway, based on study of fat metabolism and tested D levels.
Every now and then you should take a few days off without supplements, give your body a break.
Sorry, bobbled that reply.
Little amounts of D enter the bloodstream from fat stores during weight loss, meant to say.
Have you forgotten the prevalence of goiters prior to iodine supplementation?
And how about rickets prior to Vitamin D supplementation?
Vitamin D RDA’s were developed to stop rickets and rickets only. To that extent, it was short sighted. And Vitamin D deficiency, while it can be corrected with “pill popping,” is not a matter of eating a “balanced diet.” It is a matter of latitude and living indoors.
I see people with what I call sub-clinical malnutrition every day. You can be fat and malnourished.
I do that.
Thanks. I don't think all possible situations can be considered so I supplement.
Thanks for the support. Just increase your water intake a day up to half your body weight in ounces. Oh and be sure to do about 1/4 to 1/2 a teaspoon of Sea Salt every 32 ozs. That way you do not hurt your kidneys. That should help you with your weight. Initially you may pee a lot. Oh and stay away from soda, tea and caffeine. I still have to have my cup of coffee in the Morning, but I couter it with 16 ozs of water to zero out my PH level.
One thing you may want to pay attention to is vitamin B intake. I was taking a multivitamin package, and I could not understand why I was feeling constantly nauseous. Through process of elimination, I realized it was the B complex that was the culprit. I didn’t know this, but apparently some people don’t handle Bs as well as others — it was playing havoc with my liver.
Other than that, you seem to have a good regimen. The only thing I would add is coconut oil. Great for cooking, and one of the best fats out there.
Thanks and yes sign of nauseous is your body telling you that you took too much. I had to slowly work up to where I am at.
Vitamin C seems to the be the only Vitamin that would make me nauseous. That is if I took it in a high doze. This was due to the high amount of naturally produced Hydrogen Peroxide. That whole crap about well you pee it out after 3 hours is bull according to Linus Pauling (Boopk name is How to Live Longer). He tested his urine and found out only between 20 to 25% was actually coming out.
Think so? Would you adjust it at all??
I hope you don’t end up giving yourself a kidney stone with all that vitamin D.
I am going to address this issue with a new endocrinologist ... I too wonder if there is a relationship with the thyroid or para thyroids
The four parathyroids are connected to the thyroid and have their own blood supply. They can take a hit during the thyroid’s removal and take some time to recover. (Or they may not recover fully, which appears to be my case.) Two days after the second operation, I started to suffer from tetany and felt lousy. Thankfully, a nurse called to see how I was doing, found out, called my doctor who told me to get to emergency NOW. My veins collapsed from all the blood tests while they gave me the IV, trying to get my levels up to a safe level. My doctor came in to check on me and explained the levels I was at had me in a life-or-death situation.
Since then, I'm very cognizant of getting my calcium and vitamin D in and watch out for the physical symptoms that clues me in that I need to get more in. I keep Oscal with me at all times, just in case. Darn thing is, even when I think my levels should look pretty good, the blood tests will show I'm on the low side, bordering too low. It's a fight to get the levels I need in. Lots of milk, yogurt, and veggies with calcium are in my diet.
One of the signs my blood serum levels are low. I can test myself and act accordingly. When my levels were so low that I was in ER, my hands and lips tingled like they were asleep - VERY annoying!, and my legs felt like that all the way through when I sat down.
Foods of animal origin are a good source of Vitamin D. So are a few minutes of sunshine every day.
All of the diseases of malnutrition stem from people not eating a balanced, varied diet, often because of their geographical location. Ricketts was caused by Vitamin D deficiency. Scurvy, caused by lack of Vitamin C, was a problem with sailors, who would spend months at sea without fresh produce. In many cases, the specific vitamin was discovered because of the disease its lack caused.
Iodine is a problem because it comes from seafood, and people who live inland may not have much access to seafood. Thus, iodine was introduced into salt to help prevent goiter. If you eat sea salt, it should have already have iodine in it.
For the majority of people, eating a balanced diet is sufficient to meet their vitamin and mineral needs. If you have a specific medical condition (as you indicate you do), then there may be need for specific supplements.
I don’t take Vitamin D except in my multi vitamins.
The important vitamins are B6,C and E in high doses. That pretty much eliminates heart attacks and cancer. Now you do need lots of water and Sea Salt to absorb the water and that it takes it easy on your kidneys.
At any rate, I learned a lot about health and really do not fear anything anymore.