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Recent Longevity News for the seven days ending 4/14/10.  You should consult your doctor if you are taking any medications.

Drinking tap water may help you avoid dentist's drill, study says - Science Daily, 4/13/10 - "The controlled addition of a fluoride compound to public water supplies is considered to be the most cost-effective way to prevent cavities and fight tooth decay ... The second-most effective source of fluoride is varnish. Varnish, applied quickly and easily by a dentist, is one of the most concentrated products available commercially. Varnishes that contain sodium fluoride adhere to tooth surfaces when saliva is present, providing an excellent fluoride treatment"

Toothpaste with triclosan/copolymer kills harmful germs, study finds - Science Daily, 4/13/10 - "Toothpaste that contains triclosan/copolymer is better than regular fluoride toothpastes at killing the kinds of bacteria that live in people's mouths" - Note:  I thought this article was interesting because see the article below titled "FDA Reviewing Antibacterial Chemical Widely Used in Soaps and Body Washes" where they claim triclosan shouldn't even be used externally in soaps and shampoos let alone toothpaste.

Eating the Wrong Kind of Carbohydrates Increases Heart Disease Risk - U.S. News and World Report, 4/12/10 - "women who ate the most "high-glycemic" carbohydrates—which cause quick spikes in blood sugar levels—had more than twice the risk of having heart disease as those who ate the least. (The study didn't find the same association in men.) What's interesting, though, is that it was the type of carbs, not the amount, that had the health impact. "High consumption of carbohydrate from high-glycemic foods, rather than overall quantity of carbohydrate consumed, appears to influence the risk of developing heart disease in women,"" - Previous study:

  • High Carbohydrate Foods Can Cause Heart Attacks - Science Daily, 6/25/09 - "Doctors have known for decades that foods like white bread and corn flakes aren't good for cardiac health ... foods with a high glycemic index distended brachial arteries for several hours ... Enormous peaks indicating arterial stress were found in the high glycemic index groups: the cornflakes and sugar group ... During the consumption of foods high in sugar, there appears to be a temporary and sudden dysfunction in the endothelial walls of the arteries ... Endothelial health can be traced back to almost every disorder and disease in the body. It is "the riskiest of the risk factors,""

Lack of omega-3 fatty acid linked to male infertility, study suggests - Science Daily, 4/12/10 - "In our experiment, we used 'knockout' mice that lacked the gene responsible for an enzyme important in making docosahexaenoic acid (DHA). In the absence of DHA, male mice are basically infertile, producing few if any misshaped sperm that can't get where they need to go ... But, when DHA was introduced into the diet, fertility was completely restored. "It was very striking. When we fed the mice DHA, all these abnormalities were prevented,"" - See Jarrow Max DHA at Amazon.com.

Really? - The Claim - Milk Makes You Phlegmy - NYTimes.com, 4/12/10 - "Many people believe milk leads to upper-respiratory congestion, but studies have generally dismissed it as an old wives’ tale. In one well-known experiment, scientists found that even people inoculated with the common cold virus did not exhibit a statistically significant increase in symptoms or nasal secretions when they drank milk ... not all milk is the same. Some types of milk, from certain breeds of cow, contain a protein called beta-CM-7, which has been shown in studies to stimulate mucus glands in the digestive tract. These glands are also found in the respiratory tract, where they are known to overproduce mucus in conditions caused by inflammation, like asthma ... There may be a link between milk and phlegm in some people, but for now it is only hypothetical"

Omega-3 intakes may improve diabetic kidney health - Nutra USA, 4/12/10 - "Albumin is the most abundant protein in human serum and in people with kidney problems the protein leaks from the kidney into the urine. A level of 30 mg per 24 hours is reportedly representative of sufficient function ... people with a higher average intake of omega-3s had albumin excretion levels 22.7 mg per 24 hours lower than people with the lowest average intakes of omega-3" - [Abstract] - See Mega Twin EPA at Amazon.com and Jarrow Max DHA at Amazon.com.

FDA Reviewing Antibacterial Chemical Widely Used in Soaps and Body Washes - Medscape, 4/12/10 - "In animal studies, triclosan has been found to interfere with hormones crucial for normal brain development and function and reproductive system development and function"

Low vitamin B6 may increase Parkinson’s disease risk - Nutra USA, 4/12/10 - "Insufficient levels of vitamin B6 may increase the risk of Parkinson’s disease by about 50 per cent" - [Abstract]

Rheumatoid arthritis linked to vitamin D deficiency, study suggests - Science Daily, 4/10/10 - "There's higher risk in the northern latitudes ... This might be related to the fact that there's less sunlight in these areas, which results in a vitamin D deficiency ... long term exposure may be more important than recent exposure" - See vitamin D at Amazon.com.

Green tea extract effective for weight loss at low doses - Nutra USA, 4/9/10 - "during two hours after a meal, the low-dose EGCG supplementation was associated with a 33 per cent increase in fat oxidation. The high-dose EGCG supplementation produced a non-significant 20 per cent increase, compared to placebo. Caffeine alone was associated with a 34.5 per cent increase, compared with placebo, while the combined EGCG/ /caffeine supplement boosted fat oxidation by 49 per cent ... during two hours after a meal, the low-dose EGCG supplementation was associated with a 33 per cent increase in fat oxidation. The high-dose EGCG supplementation produced a non-significant 20 per cent increase, compared to placebo. Caffeine alone was associated with a 34.5 per cent increase, compared with placebo, while the combined EGCG/ /caffeine supplement boosted fat oxidation by 49 per cent. “There is no synergism of low EGCG and 200 mg caffeine,” " - [Abstract] - See green tea extract at Amazon.com.

Broccoli-extract may protect skin from harmful UV - Nutra USA, 4/9/10 - "Hairless mice developed 25 per cent fewer skin tumours following exposure to UV radiation and fed a the broccoli extract for 13 weeks, compared with mice receiving a standard protective agent ... In addition, the tumours the broccoli-fed mice did develop were 70 per cent smaller" - [Abstract]

Supplement your stem cells - Science Daily, 4/7/10 - "supplement, containing a cocktail of green tea, astralagus, goji berry extracts, 'good' bacteria Lactobacillus fermentum, antioxidant ellagic acid, immune enhancer beta 1,3 glucan and vitamin D3, was able to increase the number of stem cells circulating in the blood ... Hematopoietic stem cells and endothelial progenitor cells increased after taking the nutritional supplement, suggesting that the supplement may be a useful stimulator for both types of stem cells. In this study, the levels of these stem cells peaked at 2-7 days and started to drop at 14 days, suggesting that this supplement could be used for continuous treatment for conditions associated with decreases in these stem cells such as Alzheimer's Disease ... it may be possible that our supplement could be beneficial in conditions associated with reduced progenitor cells such as diabetes"

Abstracts from this week's Doctor's Guide Nutrition/Dietetics plus abstracts from my RSS feeds (Click here for the journals, the PubMed ones at the top):

Dietary intake of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and diabetic nephropathy - cohort analysis of the Diabetes Control and Complications Trial (DCCT) - Diabetes Care. 2010 Mar 31 - "In a mean follow-up of 6.5 years, we observed a lower mean UAER [difference 22.7 mg/24 hr (95% CI 1.6, 43.8)] in the top vs. bottom third of dietary n-3 LC-PUFAs, but found no association with incident albuminuria ... Dietary n-3 LC-PUFAs appear inversely associated with the degree, but not with the incidence of albuminuria in type 1 diabetes" - See Mega Twin EPA at Amazon.com and Jarrow Max DHA at Amazon.com.

Serum free testosterone and metabolic syndrome in Japanese men - Endocr J. 2010 Apr 1 - "Among Japanese men who were mainly without diabetes, FT was associated with Mets independently of age, BMI, and WC. Mets and insulin resistance may decrease serum testosterone via induction of hypogonadotrophic hypogonadism, and the reduction of testosterone may in turn cause further obesity and insulin resistance, consequently initiating a vicious cycle"

Prevention of colorectal cancer with vitamin D - Scand J Gastroenterol. 2010 Apr 5 - "On a molecular level, vitamin D suppresses CRC development and growth by affecting cell proliferation, differentiation, apoptosis, and angiogenesis ... Maintaining serum concentrations of calcidiol above 32 ng/ml (80 nmol/l) in individuals whose serum calcidiol level is low may help prevent CRC as well as osteoporosis, fractures, infections, and cardiovascular disease. Daily calcidiol intake of 1000 International Units can increase serum vitamin D to sufficient levels in most elderly persons and, based on available data, may substantially lower the incidence of CRC with minimal risks" - See vitamin D at Amazon.com.

Association of Testosterone and Sex Hormone-Binding Globulin with Metabolic Syndrome and Insulin Resistance in Men - Diabetes Care. 2010 Apr 5 - "men in the first quartile (lowest) (PR, 2.16; 95% CI, 1.53-3.06) and second quartile of total testosterone (PR, 2.51; 95% CI, 1.86-3.37) were more likely to have metabolic syndrome than men in the fourth quartile ... Similarly, men in the first quartile of SHBG (PR, 2.17; 95% CI, 1.32-3.56) were more likely to have metabolic syndrome than men in the fourth quartile ... Low concentrations of total testosterone and SHBG were strongly associated with increased likelihood of having metabolic syndrome, independent of traditional cardiovascular risk factors and insulin resistance"

Effects of continuous vs. interval exercise training on blood pressure and arterial stiffness in treated hypertension - Hypertens Res. 2010 Apr 9 - "Continuous and interval exercise training were beneficial for blood pressure control, but only interval training reduced arterial stiffness in treated hypertensive subjects"

Homocysteine is associated with hippocampal and white matter atrophy in older subjects with mild hypertension - Int Psychogeriatr. 2010 Apr 7:1-8 - "In older hypertensives, plasma homocysteine levels are associated with increased rates of progressive white matter and hippocampal atrophy"

Green tea extract decreases oxidative stress and improves insulin sensitivity in an animal model of insulin resistance, the fructose-fed rat - J Am Coll Nutr. 2009 Aug;28(4):355-61 - "These data suggest that green tea may be beneficial for people with decreased insulin sensitivity and increased oxidative stress, such as those with the metabolic syndrome or type 2 diabetes" - See green tea extract at Amazon.com.

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