Vitamin E Supplements Raise Risk Of Prostate Cancer

Can you guys please review this related studies? Is it safe to take tocotrienols or other vitamin E in general?




http://www.medicalnewstoday.com/articles/235881.php

Vitamin E Supplements Raise Risk Of Prostate Cancer
13 Oct 2011

Men who regularly take vitamin E supplements eventually have a higher risk of developing prostate cancer, compared to other men of the same age and overall health who don't, researchers from the Cleveland Clinic reported in JAMA (Journal of the American Medical Association). The authors say their findings clash with what most people would have expected.

As background information, the researchers wrote:


"Lifetime risk of prostate cancer in the United States is currently estimated to be 16 percent. Although most cases are found at an early, curable stage, treatment is costly and urinary, sexual, and bowel-related adverse effects are common."


Epidemiological and preclinical evidence had so far pointed towards prostate cancer preventive benefits associated with vitamin E and selenium supplements.

The authors added:


"The initial report (December 2008) of the Selenium and Vitamin E Cancer Prevention Trial (SELECT) found no reduction in risk of prostate cancer with either selenium or vitamin E supplements but a statistically nonsignificant increase in prostate cancer risk with vitamin E. Longer follow-up and more prostate cancer events provide further insight into the relationship of vitamin E and prostate cancer."


Eric A. Klein, M.D. and team set out to determine what the long-term effects of vitamin E and selenium might be on prostate cancer risk among men of relatively good health. They gathered data on 35,533 males from 427 study centers in Puerto Rico, Canada and the USA, who were randomized between August 2001 and June 2004.

They only selected males with a PSA measure below a certain level, a digital rectal examination that did not point towards a suspicion of prostate cancer, aged 50 years or more for African-Americans and 55 for other males.

In the primary analysis, 34,887 men were randomly selected into one of the four following groups:
Selenium group - 8,752 men received 200 micrograms of selenium per day
Vitamin E group - 8,737 men received 400 IU per day
Double group - 8,702 men received both selenium and vitamin E
Placebo group - 8,696 men received supplement-looking dummy tablets
There was a 7-year minimum and 12-year maximum planned follow-up. Data was gathered and analyzed up to July 2011.

A total of 521 additional prostate cancers have been reported since the initial report - in the following groups:
Placebo group - 113 cases
Vitamin E group - 147 cases
Selenium group - 143 cases
Combination group - 118 cases
In all three treatment groups there was a higher rate of prostate cancer compared to the placebo group. The vitamin E group had a 17% higher risk of developing prostate cancer compared to those in the placebo group.

When looking at the total prostate cancer rate, not just the increase since the initial report, the numbers were as follows:
Placebo group - 529
Vitamin E group - 620
Selenium group - 575
Combined group - 555
It became apparent during the participants' third year in the trial that those in the vitamin E group had a higher risk compared to those in the placebo group. The researchers said that "The elevated risk estimate for vitamin E was consistent across both low- and high-grade disease."

The authors wrote:


"In this article, we report an observation of important public health concern that has emerged with continued follow-up of SELECT participants. Given that more than 50 percent of individuals 60 years or older are taking supplements containing vitamin E and that 23 percent of them are taking at least 400 IU/d despite a recommended daily dietary allowance of only 22.4 IU for adult men, the implications of our observations are substantial."


The greater prostate cancer risk among those in the vitamin E group was only detectable after extended follow-up. This means that the effects of vitamin E can linger, even after the individual stops taking the supplement. For any study to be meaningful and relevant, the authors say the follow-up period needs to be long.

The researchers also added that when assessing the benefits and drawbacks of micronutrients as dietary supplements, studies need to be large-scale, population-based, and randomized.

They wrote:


"The observed 17 percent increase in prostate cancer incidence demonstrates the potential for seemingly innocuous yet biologically active substances such as vitamins to cause harm. The lack of benefit from dietary supplementation with vitamin E or other agents with respect to preventing common health conditions and cancers or improving overall survival, and their potential harm, underscore the need for consumers to be skeptical of health claims for unregulated over-the-counter products in the absence of strong evidence of benefit demonstrated in clinical trials."
Vitamin E
Vitamin E belongs to a group of fat-soluble compounds, including tocopherols and tocotrienols. Y- tocopherol is the most common type of vitamin E in the American diet, and can be found in margarine, soybean oil, corn oil and dressings. α-Tocopherol is the second most common form of vitamin E in the North American diet, it is also the biologically most active, and can be found in sunflower oil, safflower oil, and wheat germ oil.

Vitamin E is a fat-soluble antioxidant that halts the production of reactive oxygen species that are formed when fat is oxidized.



α-tocopherol form of vitamin E


Reports have indicated that vitamin E may have benefits for:
A vitamin E pre-cursor may protect against a kind of breast cancer
Aging
Arthritis
Better diabetes control
Certain skin conditions
Improving the immune system in elderly people
Lowering chronic obstructive pulmonary disease (COPD) in about 10% of both non-smokers and smokers
Male fertility
Parkinson's disease
PMS (premenstrual syndrome)
Protecting from Alzheimer's disease
The prevention of heart disease

Article URL: http://www.medicalnewstoday.com/articles/235881.php

Main News Category: Prostate / Prostate Cancer

Also Appears In: Men's health, Urology / Nephrology, Nutrition / Diet,

We know 400 IU per day is dangerous, nothing new.

ill remember this the next time i take my synthetic vitamin e isolate. the last thing i would want is a non-significant increased risk for cancer.

abc123 wrote:ill remember this the next time i take my synthetic vitamin e isolate. the last thing i would want is a non-significant increased risk for cancer.

WHat he said.

About this study

"I am afraid it will be the end of the story for large trials of vitamin E and selenium to prevent prostate cancer," Messing tells WebMD. "For vitamin E, that is unfortunate. Probably if given in a more effective form, it would be a protective or even therapeutic agent."

Those revealing paragraphs indicate that the end of the study will be the end of large trials for vitamin E and selenium - which was very likely a desired result, since it will now be highly unlikely that vitamin E or selenium will be studied in the forms that actually offer therapeutic and preventive benefit.

When one examines the study itself, it becomes apparent what Dr. Messing was referring to.

Instead of using the natural form of Vitamin E considered most beneficial for health, d-alpha-tocopherol acetate, they used dl-alpha-tocopherol acetate. The "d" designation in front of the "alpha" indicates that the products are derived from natural sources such as vegetable oils or wheat germ. A prefix of "dl", such as in dl-alpha- tocopherol, shows that the vitamin has been synthesized from a petroleum base.

http://www.naturalnews.com/024650_selenium_cancer_vitamin_E.html

abc123 wrote:non-significant increased risk for cancer.

The increase was shown to be statistically significant in the follow up analysis IIRC.

synthetic or non synthetic isn't good unless you have all the other tocopherols and tocotrienols to balance.

The info came out around 2003

rdkml wrote:synthetic or non synthetic isn't good unless you have all the other tocopherols and tocotrienols to balance.

The info came out around 2003

I second Jdp.

As mentioned earlier, the phony vitamin E used was of course synthetic, and they (researchers) did not use all of the isomers either. Simply put, a synthetic alpha tocopherol suppresses the activity of the more powerful gamma tocopherol.

These 'studies' are put out there to decrease the confidence of natural supplements, yet it was not real vitamin E.

Taking over 400 IU of E isn't harmful either. The truth is, tocotrienols can be suppressed if there's too much of a good thing, so as always, buy natural, not synthetic and take both all fractions of tocopherols and tocotrienols. Taking large amounts are not necessary, but they are still safe when balanced.

Many physicians and scientists are not even aware that vitamin E is in alpha, beta, delta and gamma form. What I see is thousands of studies they chose to ignore.

It doesn't need to be said, but the media gets paid by their largest advertiser, and they are not going to be publishing anything on the news that's positive about vitamins.

Also, someone correct me if I am wrong here, but I think it's important, when supplementing any one fat-soluble vitamin, to supplement all fat-soluble vitamins--A,D,E,K, in order to maintain a healthy balance.

I already take D3,A,K2 vit. I'm looking to add and E vitamine also.

is this ok?

http://www.iherb.com/Jarrow-Formulas-Toco-Sorb-Mixed-Tocotrienols-and-Vitamin-E-60-Softgels/137?=hil335

In the past i had use toco-8 for three month, but didn't notice any difference...

anyway...please advise

I use the one, you listed. It's the same one as found in the patent for hair growth.

thx