Skip to main content

Confirmatory Evidence of Cancer-Nutrition Link Remains Elusi... : Oncology Times

Confirmatory Evidence of Cancer-Nutrition Link Remains Elusi... : Oncology Times

Confirmatory Evidence of Cancer-Nutrition Link Remains Elusive
Goodman, Alice
Free Access

SAN FRANCISCO-Although a link between nutrition and cancer was posited as long ago as ancient China, modern studies have been only partly successful in illuminating this association, explained Arthur Schatzkin, MD, DrPH, of the NCI's Nutritional Epidemiology Branch, speaking here at the American Society of Clinical Oncology Annual Meeting at a Scientific Symposium on Nutrition and Cancer.

Do we have hard, credible evidence that nutritional modification can truly affect the incidence of malignant disease in humans? The answer, in short, is a resounding maybe. We are getting there, but nutrition and cancer is a complex and difficult field. When it comes to nutrition, the evidence is softer and vulnerable to the results of the latest analysis or published paper.

The dearth of hard evidence coupled with inherent difficulties in conducting valid studies in this area has led to confusion and inconsistency about the role of nutrition in the risk of developing cancer.

Obstacles to conducting studies of nutritional epidemiology of cancer cited by Dr. Schatzkin include: exposure assessment error (is the right dietary factor being studied and are the right questions being asked?), inadequate range of exposure (many populations have narrow intake distributions for certain potentially cancer-related nutrients and foods), and confounding (people who follow a certain type of diet may also differ in biologic or lifestyle factors that are related to the risk of developing cancer).

Randomized, controlled trials largely circumvent the problem of confounding, and results from such studies are extremely compelling, Dr. Schatzkin continued. However, these studies are expensive and logistically complex to mount.

At present, Dr. Schatzkin said it is difficult to make recommendations with certainty regarding controversial areas such as the relationship of dietary fat intake and breast cancer; the role of dietary fiber and colorectal cancer; and the role of vitamins/supplements (i.e., beta carotene and lung cancer, lycopene, and prostate cancer, and folic acid and colorectal cancer). The hope is that future studies will help to resolve these issues.

Comments

Popular posts from this blog

Insulin Resistance- cause of ADD, diabetes, narcolepsy, etc etc

Insulin Resistance Insulin Resistance Have you been diagnosed with clinical depression? Heart disease? Type II, or adult, diabetes? Narcolepsy? Are you, or do you think you might be, an alcoholic? Do you gain weight around your middle in spite of faithfully dieting? Are you unable to lose weight? Does your child have ADHD? If you have any one of these symptoms, I wrote this article for you. Believe it or not, the same thing can cause all of the above symptoms. I am not a medical professional. I am not a nutritionist. The conclusions I have drawn from my own experience and observations are not rocket science. A diagnosis of clinical depression is as ordinary as the common cold today. Prescriptions for Prozac, Zoloft, Wellbutrin, etc., are written every day. Genuine clinical depression is a very serious condition caused by serotonin levels in the brain. I am not certain, however, that every diagnosis of depression is the real thing. My guess is that about 10 percent of the people taking ...

Could Narcolepsy be caused by gluten? :: Kitchen Table Hypothesis

Kitchen Table Hypothesis from www.zombieinstitute.net - Heidi's new site It's commonly known that a severe allergy to peanuts can cause death within minutes. What if there were an allergy that were delayed for hours and caused people to fall asleep instead? That is what I believe is happening in people with Narcolepsy. Celiac disease is an allergy to gliadin, a specific gluten protein found in grains such as wheat, barley and rye. In celiac disease the IgA antigliadin antibody is produced after ingestion of gluten. It attacks the gluten, but also mistakenly binds to and creates an immune reaction in the cells of the small intestine causing severe damage. There is another form of gluten intolerance, Dermatitis Herpetiformis, in which the IgA antigliadin bind to proteins in the skin, causing blisters, itching and pain. This can occur without any signs of intestinal damage. Non-celiac gluten sensitivity is a similar autoimmune reaction to gliadin, however it usually involves the...

Blue-blocking Glasses To Improve Sleep And ADHD Symptoms Developed

Blue-blocking Glasses To Improve Sleep And ADHD Symptoms Developed Scientists at John Carroll University, working in its Lighting Innovations Institute, have developed an affordable accessory that appears to reduce the symptoms of ADHD. Their discovery also has also been shown to improve sleep patterns among people who have difficulty falling asleep. The John Carroll researchers have created glasses designed to block blue light, therefore altering a person's circadian rhythm, which leads to improvement in ADHD symptoms and sleep disorders. […] How the Glasses Work The individual puts on the glasses a couple of hours ahead of bedtime, advancing the circadian rhythm. The special glasses block the blue rays that cause a delay in the start of the flow of melatonin, the sleep hormone. Normally, melatonin flow doesn't begin until after the individual goes into darkness. Studies indicate that promoting the earlier release of melatonin results in a marked decline of ADHD symptoms. Bett...