Friday, March 30, 2007
New research on bad effects of jet lag
And the researchers provide this handy little formula for calculating how much jet lag you'll probably encounter.
"Jet lag caused by eastbound flights lasts for several days "roughly equal to two-thirds of the number of time zones crossed, and about half the number of time zones crossed for westward flights,""
The advice on how to deal with jetlag: "For journeys that cross more than three time zones, travelers can help the body clock adjust by deliberately seeking or avoiding sunlight at the new destination...Trying to maintain alertness during the day at the new destination by exercising and/or drinking caffeinated beverages may also help. The jury is still out on the value of taking the hormone melatonin to curb jet lag, the authors say. Melatonin is secreted during sleep and has been implicated in jet lag, but Waterhouse and colleagues don't advise using melatonin until more research is conducted..."
In my experience 1.5-3mg of melatonin right before bedtime in a new time zone really does help reset the circadian faster than light exposure and other methods. Curious that the authors seem overly cautious with melatonin.
CDC offer this: "melatonin seems to be safe and well tolerated, and doses of 0.5-5 mg promoted sleep and decreased jet lag in travelers crossing five or more time zones. Five-mg doses promoted more rapid sleep than lower doses; doses >5 mg had no additional benefit. Slow-release forms were not effective. Melatonin should be taken at the target bedtime, beginning 3-4 days before departure if possible."
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Nutrient Combo May Curb Hearing Loss
In this case does applying for patent indicate unpublished but major findings in order to assure patent approval? Because this research alone doesn't seem to warrant a patent - so maybe they're sitting on other papers till the patent is approved. Or maybe the press isn't doing justice to the research. Who knows.
Other supplements that have shown promise for a variety of types of hearing loss here.
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Omega-3 Fatty Acid May Protect Heart
WebMD 3/29/07 "2.8% of those taking EPA along with statins experienced a major coronary event, compared with 3.5% of those only taking statins...EPA pills weren't linked to any difference in fatal heart attacks or sudden cardiac death...When Yokoyama's team took a closer look at the data, they found the EPA advantage only applied to patients with a known history of coronary artery disease. Patients with high cholesterol but no history of coronary artery disease may also get some heart protection from EPA, but that's not certain..."EPA might affect risk only at very high levels of fish intake, such as those common in Japan," ...Lastly, the researchers note that they only tested EPA pills, not fish or fish oil."
An unusual amount of caveats coming out with this research - still, it made it to the Lancet.
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Wednesday, March 28, 2007
Being sedentary raises blood sugar
Higher levels of blood sugar = greater risk of a variety of diseases = increased chance of early mortality. The simple answer, although it can be hard in practice is to drag your ass out of that chair and get your heart rate up for 30+ minutes 5 days a week. Start slow and easy and gradually increase workout intensity. The benefits of this are massive - as a quick pubmed dump on the topic proves - or a more organized NIH education site. As if we haven't know this forever. And yet... obesity and type 2 diabetes are on the rise - the latter being almost totally preventable and reversible if caught early enough.
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Vitamin D and calcium might help prevent colorectal cancer
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Tuesday, March 27, 2007
Blueberries might help prevent colon cancer
More on blueberries and colon cancer at ScienceDaily.
Previous post on potential health benefits of pterostilbene - cousin of resveratrol.
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Grape seed extract might protect against skin cancer
MSNBC has Reuters coverage of this
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Aspirin for Women: Yes or No
25% less likely to die of any cause
38% less likely to die of heart disease or stroke
28% less likely to die of colon cancer
Women who regularly took high-dose aspirin -- more than 14 adult-strength tablets a week -- did not get a health benefit. Instead, they were 43% more likely to die from hemorrhagic stroke compared with those who never took aspirin. Hemorrhagic stroke is stroke due to bleeding in the brain...Women got a heart benefit from aspirin after about five years of use. The cancer benefit didn't appear before 10 years of regular aspirin use...The evidence remains strong that daily low-dose aspirin cuts a man's risk of heart disease and stroke -- although the drug does increase a man's risk of ulcers and gastrointestinal bleeding..."This is the infamous Nurse's Health Study that led us down the wrong path for many things like hormone replacement therapy and antioxidants because it is observational and can't control for bias. The Women's Health Study was long-term and randomized, so recommendations should be based on that."...Chan, too, agrees that women should not start taking aspirin willy-nilly. But he says the study data raise important questions."
Debate not over. I don't think the Women's Health Study is as virtuous as some proponents think, nor is the Nurse's Health Study as bad as critics think. Both have their problems of methodology. But I suspect in this case that the Women's Health Study is wrong about aspirin and that 81mg a day does have significant health benefits. The connection of inflammation to a whole host of diseases should not be so easily dismissed.
The lesson from this latest research is that there seems to be no reason to use more than baby aspirin at 81mg a day and plenty of reasons not to use more than 325mg a day - as in a complete negation of health benefits and dramatic increase in mortality via stroke.
So 81mg's a day it is.
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Monday, March 26, 2007
TB variety now totally resistant to antibiotics
NewScientist has a good editorial about how the world has ignored diseases in the developing world esp. TB - with the result being that strains of this incredibly deadly disease is now mostly, or totally resistant to all medicine. The larger lesson as they make very clear is - ignore the poor countries and their welfare at your peril. Chances are if a pandemic hits, of any disease, it will mainly be the result of our profound stupidity... not a bolt from the blue.
Here are some key points.
"REMEMBER when lots of people died of ordinary bacterial infections? Probably not, unless you were around before the 1950s. That's when antibiotics stopped the rot, at least for the world's better-off...The bad news is those days are returning. Tuberculosis has broken free of antibiotic control, a fact that could affect us all...Last year it erupted in 9 million people and killed 1.6 million, putting it among the world's biggest causes of death...TB has thrived in the mushrooming urban slums of poor countries and grown among poor communities in rich countries as those nations dismantled public health systems designed to eradicate TB...Now, some strains - known as extremely drug-resistant, or XDR - have shrugged off many of the remaining anti-TB drugs. This week we report the arrival of CDR, or completely drug-resistant, TB (see "The white plague"). Doctors cannot hammer these bacteria with new drugs or vaccines because no companies have developed any. There are few profits in diseases of the poor...TB resistant to one or two drugs grew from a few cases in the 1990s to one-fifth of cases today. XDR-TB is likely to do the same. It is now poised to rip through the millions of African people who have HIV...We thought we had beaten TB. Now it is back and we are almost defenceless. On every level this is because the world neglects diseases of the poor."
We spend billions on bogus wars and waste hundreds of millions on bogus security but when it comes to potential pandemics we spend hardly a thing? Genius. Vote out any politician that doesn't understand.
Friday, March 23, 2007
Iron deficiency lowers women's mental abilities
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Thursday, March 22, 2007
DHA linked to denser bones
So another study that shows why omega-3's help fight osteoporosis and other bone disorders later in life. One question I have is did these young men have fewer fractures than average due to the greater bone mineral density? If so this would be another benefit of omega 3 fatty acids.
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Blood sugar 'boosts cancer risk'
There is a mountain of evidence that shows that daily vigorous exercise can help prevent a variety of cancers. Could it be that one of the main ways that exercise helps fight off cancer if via modulation of blood sugar levels? Anyway it is encouraging that diet, exercise and watching one's fat levels could affect blood sugar levels in a positive way and in so doing significantly reduce the chance of getting a variety of cancers.
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Musical Brain Better at Language?
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Wednesday, March 21, 2007
Vitamin D in pregnancy might reduce childhood asthma
For each 100-IU increase in vitamin D, the risk of having a child with recurrent wheeze fell by 19 percent...This benefit was noted whether the vitamin D came from supplements or the diet...In the second study...Compared with the group with the lowest vitamin D levels, women with the highest levels of vitamin D had a 52-percent reduced risk of wheeze and a 65-percent reduced risk of wheeze in the previous year. Vitamin D levels were also associated with reductions in bronchodilator response, which is aggravated in asthma..."Our results are of great public health significance because they could lead to relatively low cost interventions of vitamin D supplementation that would have a large effect on the future prevalence of asthma in children," "
AJCN abstract
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Plant lignans might cut breast cancer risk
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To avoid colon cancer, eat more fruit, less meat
More research based on memory. Not the hardiest of research, but another data point to note when considering diet and cancer.
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Tuesday, March 20, 2007
Vitamin D linked to lower breast cancer risk
The last part is important to remember since memory is notoriously faulty. Still, this is in line with previous research on vitamin D and breast cancer. But what's going on with milk? Is this true, or an artifact of false memory? Since most milk still has D2 in it and has for years and this form has recently been proven to be virtually ineffective in our bodies. Or is there something else in milk that helps prevent breast cancer?
NIH has a good site on Vitamin D
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Concord grape juice best juice for antioxidants
ABC News has more on this.
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High fat diet and breast cancer
What does the last part mean? Exercise almost every day so that you reduce your body fat levels and you will reduce your chance of getting breast cancer to a significantly greater degree than merely watching your diet. With the contradictory information on fat and breast cancer, exercise seems the more prudent lifestyle change.
Research from last year indicates dietary fat and breast cancer are not linked. Needless to say the final verdict on this subject is far from rendered.
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Monday, March 19, 2007
Zinc reduces mortality in children
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Periodontal disease connected with diabetes
Now what is the mechanism between the health of teeth and gums and how our overall metabolism works? No specifics on this in the article - I'll update post later if I can find them.
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Thursday, March 15, 2007
Green tea and COX-2 inhibitor slows prostate cancer
I hope someone does a study on curcumin, a natural COX-2 inhibitor with no noted side effects and EGCG. Studies have shown that curcumin directly blocks the enzymatic activity of COX-2 - plus curcumin seems to have other means of cancer prevention. So it would seem this might be a more preferably choice than Celebrex - but we'll need a study or two to prove it.
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Wednesday, March 14, 2007
Different biologic strategies of aging
Much more in this interesting article at EurkeAlert.
lead author is Martin Ackermann
To complicate this matter this study on E-coli reveals that even "symmetric reproduction" is in a way asymmetric - "We conclude that the two supposedly identical cells produced during cell division are functionally asymmetric; the old pole cell should be considered an aging parent repeatedly producing rejuvenated offspring. These results suggest that no life strategy is immune to the effects of aging, and therefore immortality may be either too costly or mechanistically impossible in natural organisms."
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Cocoa Boosts "Good" Cholesterol
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The Benefits of Yogurt
What's tasty, easy, and has lots of health benefits? Yogurt! WebMD 3/5/07 "Benefit No. 1: Yogurt May Help Prevent Osteoporosis...''The combination of calcium and vitamin D has a clear skeletal benefit, provided the dose of vitamin D is sufficiently high,'' ...Benefit No. 2: Yogurt May Reduce the Risk of High Blood Pressure...''We observed a 50% reduction in the risk of developing high blood pressure among people eating 2-3 servings of low-fat dairy a day (or more), compared with those without any intake,'' ...Benefit No. 3: Yogurt With Active Cultures Helps the Gut...Yogurt with active cultures may help certain gastrointestinal conditions, including:Lactose intolerance - Constipation - Diarrhea -Colon cancer - Inflammatory bowel disease - H. pylori infection
That's what researchers from the Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging at Tufts University concluded in a recent review article.The benefits are thought to be due to: Changes in the microflora of the gut -The time food takes to go through the bowel -Enhancement of the body's immune system... Benefit No. 4: Yogurt With Active Cultures May Discourage Vaginal Infections...the vaginal pH (measure of acidity or basicity) of the group eating yogurt with active cultures dropped from 6.0 to 4.0 (normal pH is 4.0-4.5)...Benefit No. 5: Yogurt May Help You Feel Fuller..."
The article on yogurt continues at WebMD.
What about probiotics for dogs? Here's one of the studies showing they benefit as well: Effects of probiotic bacteria in dogs with food responsive diarrhoea treated with an elimination diet. Of course what strains that are best for us, might not be best for them.
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Long-Lived Parents = Low Heart Risk
More evidence showing that most people with a healthy lifestyle can make it to 85, but beyond that you need the luck of the gene draw. Jeanne Calmet lived to 122 most likely because of a variety of genes working in combination... not because she liked her morning constitutional.
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Tuesday, March 13, 2007
Vitamin C reacts with chromium 6 causing strong mutagen
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Green Tea May Fight Lung Cancer
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EPA - omega 3 fatty acid, might boost brain power
A super small non clinical study - all of 4 people. This is only notable because of Professor Basant Puri's previous work with EPA and the marked results of this study.
"Tests of VegEPA, in four overweight youngsters, showed improvement in reading, concentration, and memory. Brain scans showed three years worth of development in just three months in the children...experts warned the study was extremely small and the current evidence on the benefits of fatty acid supplements was inconclusive...Tests done at the end of the three-month study found the children showed an increase in reading age of well over a year, their handwriting became neater and more accurate and they paid more attention in class...Brain scans which identified a chemical called N-Acetylaspartate (NAA) which is linked to the growth of nerve fibres in the brain also showed dramatic changes..."In three months you might expect to see a small NAA increase. "But we saw as much growth as you would normally see in three years. "It was as if these were the brains of children three years older. It means you have more connections and greater density of nerve cells, in the same way a tree grows more branches."... Professor Puri said he believed that it was EPA specifically which conferred the benefits which was why studies of fish oil supplements which also contain a fatty acid called DHA showed confusing results..."
More on this at Timesonline.
A full clinical trial will be led by Professor Puri and maybe then we'll have a better understanding of EPA's effects on our brains. I have to say the DHA vs EPA debate which has been going on for a decade seems to have little resolution which is frustrating. I had expected that by now there would be better delineation of what each fatty acid does in the brain, whether there is an optimum ratio for prenatal, postnatal nutrition and for children, adults, men and women. Also what is best for depression and other disorders? (some answers seem to have come in the last few years - but also lots of conflicting results) Another question is to what extent do these fatty acids compete/compliment in the brain? Rest of the body?
I notice there are a couple of studies one at Harvard and one at Stanford that might help shed some light on this debate... or not. Results in 2008? Stay tuned.
Previous posts on fish oil.
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Monday, March 12, 2007
Chocolate - Cocoa 'Vitamin' Health Benefits Could Outshine Penicillin
Most flavanols like epicatechin are taken out of chocolate products because of the bitterness they can add to flavor... guess how fast chocolate makers are trying to get these back in their products?
More on the wonders of cocoa in these earlier posts. I can't think of a supplement that is causing as much excitement in the health community. Next thing you know they'll find a flavanol or two that works more effectively on sirt1 than resveratrol. Ok maybe that's going too far, but you never know. Did Sinclair's lab test flavanols in cocoa?
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Specific CLA isomer and diabetes, heart disease etc
Again the importance of the isomer form of a supplement. Last one was on lycopene. Science on nutraceuticals almost never seems to get simpler...
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Exercise boosts brainpower
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Meditation May Benefit Heart Patients
Small study but apparently with rather dramatic results. More at Reuters.
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Soft drinks tied to diabetes
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Sunday, March 11, 2007
Choline helps with prenatal alcohol exposure
Taking choline during pregnancy has also been associated with boosting intelligence and memory of children.
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Friday, March 9, 2007
Omega 3 might build grey matter in the brain and improve mood
USAToday on this story - implying DHA is the fatty acid responsible for the benefit.
This coming on the heels of the meta study indicating that omega 3 fatty acids are of no help with depression. What's a person to do? Wait for the next round of studies... of which this is one. Of course there are other reasons to take omega 3 supplements.
Maybe a better bet to build grey matter is with cocoa.
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Thursday, March 8, 2007
80% of Older Adults Have Chronic Ills
The findings include
- "One in five people aged 65 and older is obese.
- Nearly one in three (32%) is sedentary (no physical activity in the past month).
- Only 30% eat at least five fruits and vegetables daily.
- More than 20% don't have any of their own teeth.
- 34% are disabled.
- More than a third haven't been screened for colorectal cancer.
- A quarter of women aged 65 and older haven't had a mammogram in the last two years.
- About 6% report mental distress 14 or more days in the past month."
The advice, basic as it is:
- Be physically active.
- Take care of your oral health.
- Stay up to date with your vaccinations.
- Get screened for colorectal cancer.
- Learn how to prevent falls.
- Talk to your family and doctor about your wishes for end-of-life care.
- Not smoking, eating at least five daily servings of fruits and vegetables, and getting other medical tests and checkups are also recommended.
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Wednesday, March 7, 2007
Calorie restriction and longevity
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Modified orange tomatoes have more available lycopene
So what is the better form of lycopene?
ScienceDaily covered this story last month. In that coverage they note "Lycopene is a carotenoid that contains a variety of related compounds called isomers. Isomers share the same chemical formula, yet differ in chemical structure. In the case of tomatoes, the different lycopene isomers play a part in determining the color of the fruit...several of these isomers, called cis- lycopenes, in human blood. But most of the tomatoes and tomato-based products we currently consume are rich in all-trans-lycopene. “We don't know why our bodies seem to transform lycopene into cis-isomers, or if some isomers are more beneficial than others,...researchers don't know if tomatoes rich in cis-lycopene would provide greater health benefits to humans, but the study's results suggest that tomatoes can be used to increase both the intake and absorption of the health-beneficial compounds...“Our study showed that a tomato can also increase beta carotene levels in the blood,” Schwartz said. While these special tomatoes were grown just for this study, the researchers have pre-commercial lines of both varieties available..."
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Atkins diet seems best
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Capsaicin might halt fight formation
Doesn't hurt to try. Actually capsaicin has shown other health benefits like fighting cancer. But considerably more research will be needed on capsaicin, to state the obvious.
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Tuesday, March 6, 2007
Ginkgo could aid memory formation in those with brain ailments
So what about ginkgo in healthy folks? Is there a similar long term change of brain activity related to gaba?
NIH has a short primer on Ginkgo. On that site it mentions the study done by NIA where 200 healthy individuals were given ginkgo for 6 weeks and were found to have no improvement in memory. This larger study contradicted smaller studies done previously.
Mayo Clinic has a good site that rates the health use of ginkgo for various conditions.
It appears ginkgo works more effectively for some whose memory centers are ailing for a variety of reasons. More research is underway so there will be a clearer idea of the benefits of ginkgo relatively soon.
This 2007 study seems to reinforce the notion that ginkgo might not help memory in people that are healthy.
As always Ray Sahelian has a good post on ginkgo.
What are the benefits of ginkgo for healthy people? A number of studies indicated that ginkgo boosts glutathione and thus helps limit oxidative damage from a variety of environmental factors.
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Monday, March 5, 2007
Whole-Grain Cereals Cut Heart Failure
No suggested mechanism of action mentioned in the article. This looks like a very solid study - actually any research based on The Physicians Health Study is a gold standard.
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Thursday, March 1, 2007
Wine Drinkers May Live Longer
More details at ScienceDaily.
No mention of resveratrol? Or of Sirt 1 gene?
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