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Recent Longevity News for the seven days ending 7/11/07.  You should consult your doctor if you are taking any medications.

Low testosterone may risk heart - BBC News, 7/9/07 - "Post-menopausal women with low levels of the male sex hormone testosterone are more likely to develop heart disease ... Those with atherosclerosis had much less testosterone than those without"

Selenium Supplements: Diabetes Risk - WebMD, 7/9/07 - "During the study, 58 participants in the selenium group reported being diagnosed with type 2 diabetes, compared with 39 people taking the placebo"

Kids' Bones at Risk From Low Vitamin D - WebMD, 7/9/07 - "55% of the children had lower than recommended vitamin D levels ... Overall, 68% of children had inadequate stores of the vitamin in their blood during the colder months when they spent more time indoors" - See vitamin D at Amazon.com.

Folate may reduce liver damage study - Nutra USA, 7/6/07 - "higher red blood cell folate levels were associated with a 67 per cent reduced risk of liver cancer" - [Abstract] - See folic acid at Amazon.com.

Lower Bone Mineral Density Found in Older Men Using SSRIs - Medscape, 7/6/07 - "SSRI use was associated with lower mean BMD at the hip and spine, but there was no significant difference among users of TCAs or trazodone hydrochloride and nonusers"

SSRI Use in Older Women Linked to Accelerated Hip Bone Loss - Medscape, 7/6/07 - "Women not taking SSRIs lost bone density at a rate of about 0.5% per year, and the women taking SSRIs lost bone density at a rate of about 0.8% per year"

Fitness Reduces Inflammation, Study Suggests - Science Daily, 7/6/07 - "the research “certainly suggests that fitness may be associated with a decrease in inflammation even independent of body fat and several things, and the mechanism may involve a parasympathetic anti-inflammatory reflex"

Why Liver Cancer Is More Prevalent In Males Than In Females - Science Daily, 7/5/07 - "By eliminating IL-6, we reduced the incidence of liver cancer in the males by close to 90%"

Diabetes Drug Avandia: Heart Disease Risk Inconclusive? - WebMD, 7/5/07 - "The researchers note that they can't tell yet if there is an association between Avandia and heart attacks or Avandia and heart disease in general"

Chronic Insomnia May Predict Anxiety Disorders - WebMD, 7/5/07 - "People with chronic insomnia were more likely to have current anxiety or depression than people without insomnia"

Older Patients Reap Positive Benefits With High Dose Statins, Study Finds - Science Daily, 7/3/07 - "The study participants had a relative reduction in risk of 19 percent for a major cardiovascular event with high-dose compared with low-dose atorvastatin. The important feature is that this occurred without any evidence of increase in risk from the high dose"

Abstracts from this week's Doctor's Guide Nutrition/Dietetics plus abstracts from my RSS feeds:

Pioglitazone Decreases Ambulatory Blood Pressure in Type 2 Diabetics With Difficult-to-Control Hypertension - J Clin Hypertens (Greenwich). 2007 Jul;9(7):530-7 - "add-on therapy with pioglitazone 30 to 45 mg for 20 weeks. After 20 weeks of treatment, 24-hour ambulatory BP monitoring showed significant reductions (from 144+/-13 to 136+/-16 mm Hg systolic BP and from 79+/-9 to 76+/-10 mm Hg diastolic BP [P=.001]). Treatment was also associated with improvements in insulin sensitivity and glycemic and lipid profile"

Anti-ageing effect of a lactococcal strain: analysis using senescence-accelerated mice - Br J Nutr. 2007 Jul 9;:1-9 - "Oral administration of heat-killed Lactococcus lactis subsp. cremoris H61 (strain H61) to aged SAMP6 mice was associated with reduced bone density loss, a suppression of incidence of skin ulcers and reduced hair loss, compared with controls"

Tomato juice decreases LDL cholesterol levels and increases LDL resistance to oxidation - Br J Nutr. 2007 Jul 9;:1-8 - "a high dietary intake of tomato products had atheroprotective effects, it significantly reduced LDL cholesterol levels, and increased LDL resistance to oxidation in healthy normocholesterolaemic adults. These atheroprotective features associated with changes in serum lycopene, beta-carotene and gamma-carotene levels"

Beneficial effects of a 5-week low-glycaemic index regimen on weight control and cardiovascular risk factors in overweight non-diabetic subjects - Br J Nutr. 2007 Jul 9;:1-11 - "Mean body weight decrease was significant in the LGI group ( - 1.1 (sEM 0.3) kg, P = 0.004) and was significantly greater than in the HGI group ( - 0.3 (sEM 0.2) kg, P = 0.04 between groups). Hunger sensation scales showed a trend towards a decrease in hunger sensation before lunch and dinner in the LGI group when compared with the HGI group (P = 0.09). No significant increase in insulin sensitivity was noticed. The LGI diet also decreased total cholesterol by 9.6 % (P < 0.001), LDL-cholesterol by 8.6 % (P = 0.01) and both LDL-:HDL-cholesterol ratio (10.1 %, P = 0.003) and total:HDL-cholesterol ratio (8.5 %, P = 0.001) while no significant changes were observed in the HGI group"

Bone mineral density and bone markers in patients with a recent low-energy fracture: effect of 1 y of treatment with calcium and vitamin D - Am J Clin Nutr. 2007 Jul;86(1):251-9 - "A 1-y intervention with calcium and vitamin D reduced bone turnover, significantly increased BMD in patients younger than 70 y, and decreased bone loss in older patients. The effect of treatment was related to physical performance"

Association between dietary glycemic index and age-related macular degeneration in nondiabetic participants in the Age-Related Eye Disease Study - Am J Clin Nutr. 2007 Jul;86(1):180-8 - "Compared with eyes in the first quintile of dGI, eyes in the fourth and fifth quintiles had a significantly or suggestively higher risk of large drusen, geographic atrophy, and neovascularization. The multivariate-adjusted odds ratios (95% CIs) for the highest quintile were 1.42 (1.09, 1.84), 1.78 (0.81, 3.90), and 1.41 (0.95, 2.08), respectively, of which only the odds ratio for large drusen was significant. A significant positive relation between dGI and severity of AMD was also noted (P for trend < 0.001). There was a 49% increase in the risk of advanced AMD (geographic atrophy plus neovascularization) for persons with a dGI higher than the sex median"

Blood folate levels and risk of liver damage and hepatocellular carcinoma in a prospective high-risk cohort - Cancer Epidemiol Biomarkers Prev. 2007 Jun;16(6):1279-82 - "When comparing persons in the lowest quartile RBC folate to persons in all other quartiles, the analysis found that higher RBC folate levels were associated with reduced risk of hepatocarcinogenesis (odds ratio, 0.33" - See folic acid at Amazon.com.

Flavonoids and the risk of renal cell carcinoma - Cancer Epidemiol Biomarkers Prev. 2007 Jan;16(1):98-101 - "After adjustment for major recognized confounding factors and total energy intake, the odds ratios for subjects in the highest versus the lowest quintile of intake were 0.80 [95% confidence interval (95% CI), 0.58-1.11] for total flavonoids, 0.76 (95% CI, 0.56-1.03) for isoflavones, 0.94 (95% CI, 0.60-1.47) for anthocyanidins, 0.77 (95% CI, 0.56-1.06) for flavan-3-ols, 0.90 (95% CI, 0.67-1.21) for flavanones, 0.68 (95% CI, 0.50-0.93) for flavones, and 0.69 (95% CI, 0.50-0.95) for flavonols"

High-normal fasting blood glucose in non-diabetic range is associated with increased coronary artery calcium burden in asymptomatic men - Atherosclerosis. 2007 Jun 30 - "coronary artery calcium (CAC) ... The prevalence of CAC was significantly higher among men with high-normal FBG (4th quartile: 94-125mg/dl) versus normal FBG group (lower three quartiles: 66-93mg/dl) (62% versus 35%, p<0.0001). In age adjusted analyses the odds ratio (OR) for any CAC among men with high-normal FBG versus normal FBG was 2.19" - See my Insulin and Aging page.

Associations of salivary cortisol with cognitive function in the Baltimore memory study - Arch Gen Psychiatry. 2007 Jul;64(7):810-8 - "Higher levels of pretest and mean cortisol as well as the area under the curve of cortisol over the study visit were associated with worse performance (P < .05) in 6 domains (language, processing speed, eye-hand coordination, executive functioning, verbal memory and learning, and visual memory). For instance, an interquartile range increase in the area under the curve was equivalent to a decrease in the language score expected from an increase in 5.6 (95% confidence interval, 4.2-7.1) years of age" - See my cortisol page for ways to reduce it.

Correlation between vitamin D(3) deficiency and insulin resistance in pregnancy - Diabetes Metab Res Rev. 2007 Jul 2 - "Total prevalence of vitamin D deficiency (<25 nmol/L) was found in 70.6% of pregnant women ... These results show that a positive correlation of 25(OH) vitamin D concentrations with insulin sensitivity and vitamin D deficiency could be a confirmative sign of insulin resistance"

The impact of thiazolidinedione use on outcomes in ambulatory patients with diabetes mellitus and heart failure - J Am Coll Cardiol. 2007 Jul 3;50(1):32-6 - "In ambulatory patients with established HF and diabetes, the use of TZDs was not associated with an increased risk of HF hospitalization or total mortality when compared with those not receiving insulin-sensitizing medications"

Effects of folic acid and vitamin B complex on serum C-reactive protein and albumin levels in stable hemodialysis patients - Curr Med Res Opin. 2007 Jun 29 - "Folic acid and vitamin B complex co-administration effectively lowers tHcy and hs-CRP levels and increases albumin levels in stable hemodialysis subjects, underscoring their potential benefit to attenuate the state of inflammation and possibly improve the nutritional status in patients on hemodialysis"

I just purchased a new computer with Windows Vista Ultimate.  I had a heck of a time figuring out how to configure the Remote Desktop Connecting feature using a Linksys router.  When I finally figured it, I made a web page to show how to do it.  Click here for the instructions.  You'll need Microsoft Windows XP Professional or Windows Vista Ultimate for the feature to work.   It's a neat feature.  You can log unto your computer from anywhere in the world and it's like having you computer right in front of you.

Health Focus (aromatization/gynecomastia):

  1. Anastrozole (Arimidex) - anabolic-androgenic-steroids.com - "Anastrozole (Arimidex) is the aromatase inhibitor of choice ...With moderate doses of testosterone 0.5 mg/day is usually sufficient and in some cases may be too much" - Femara (letrozole) may not have been available at the time this article was written.
  2. Chrysin: Is It An Effective Aromatase Inhibitor? - vrp.com - "Unfortunately, there does not appear to be any effective natural inhibitor of aromatase"
  3. Male Hormone Modulation Therapy  - Life Extension Magazine, 11/99 - "One cause of hormone imbalance in men is that their testosterone is increasingly converted to estrogen. One report showed that estrogen levels of the average 54-year-old man are higher than those of the average 59-year-old woman . . . . High levels of estrogen have been implicated as a cause of benign prostatic hypertrophy (BPH)"
  4. Long-term Consequences of the Aromatase Inhibitors - Medscape, 11/16/05 - "The "short-term toxicities," such as vasomotor symptoms, venothromboemboli, and gynecologic complications, favor the use of AIs. However, long-term bone loss, altered lipid profiles, and possible compromise in sexual functioning appear to be adversely affected by the AIs"
  5. Letrozole normalizes serum testosterone in severely obese men with hypogonadotropic hypogonadism - Diabetes Obes Metab. 2005 May;7(3):211-5 - "Six weeks of treatment decreased serum estradiol from 120 +/- 20 to 70 +/- 9 pmol/l (p = 0.006). None of the subjects developed an estradiol level of less than 40 pmol/l. LH increased from 4.5 +/- 0.8 to 14.8 +/- 2.3 U/l (p < 0.001). Total testosterone rose from 7.5 +/- 1.0 to 23.8 +/- 3.0 nmol/l (p < 0.001) without a concomitant change in sex hormone-binding globulin level. Those treated with Letrozole 17.5 mg per week had an excessive LH response" - Note:  A half tablet per day would be 8.75 mg/week.  I believe 40 pmol/l of estradiol is 11.54 pg/mL and the normal value for men is 10 to 52 pg/mL (Quest says 10 to 50).  The way I read that, testosterone tripled.  I take a quarter tablet a day of Femara (letrozole).  See Femara at International Anti-aging Systems or Letrozole at OffshoreRX.com.
  6. Testosterone Deficiency & Depression, Does DHEA Raise the Levels of Bioavailable Testosterone in Men? - Life Extension Magazine, 8/02 - "Some men on testosterone drug replacement therapy develop dangerously high estrogen levels. Estrogen can be suppressed by taking an aromatase-inhibiting drug like Arimidex (0.5 mg twice a week) or using a supplement like Super Mira Forte (six capsules daily)" - See Arimidex at International Anti-aging Systems.
  7. Male Hormone Modulation Therapy - Life Extension Magazine - "If all of the above fail to increase free testosterone and lower excess estradiol, then ask your doctor to prescribe the potent aromatase inhibiting drug Arimidex (anastrozole) in the very low dose of one-half (0.5 mg) mg, twice a week"
  8. Can Broccoli Prevent Lupus? - WebMD, 11/6/03 - "I3C is believed to act as an anti-estrogen ... I3C-fed mice had far fewer kidney problems than the mice whose diets were not supplemented, and researchers say this is the reason that they lived much longer. Kidney disease is one of the main, life-threatening complications of lupus" - See indole-3-carbinol at Amazon.com.
  9. Why Testosterone Levels Decline  - Life Extension Magazine, 11/99 - "Clinical studies using testosterone injections, creams, or patches have often failed to provide a long-lasting, libido-enhancing effect in aging men (98). We now know why. The testosterone can be converted to estrogen. The estrogen is then taken up by testosterone receptor sites in cells throughout the body. When an estrogen molecule occupies a testosterone receptor site on a cell membrane, it blocks the ability of serum testosterone to induce a healthy hormonal signal. It does not matter how much serum free testosterone is available if excess estrogen is competing for the same cellular receptor sites"
  10. Correcting A Hormone Imbalance  - Life Extension Magazine, 11/99 - "If all of the above fail to increase free testosterone and lower excess estradiol, then ask your doctor to prescribe the potent aromatase inhibiting drug Arimidex (anastrozole) in the very low dose of one-half (0.5 mg) mg, twice a week"
  11. Androgel prescribing information - androgel.com - "Serum estradiol (E2) concentrations increased significantly within 30 days of starting treatment with AndroGel® 5 or 10 G/day and remained elevated throughout the treatment period but remained within the normal range for eugonadal men" - Yeah, but what if you are taking DHEA and what about testosterone/estrogen ratios.   See:
    1. Biotransformation of oral dehydroepiandrosterone in elderly men: significant increase in circulating estrogens - J Clin Endocrinol Metab 1999 Jun;84(6):2170-6 - "Serum testosterone and dihydrotestosterone remained unchanged after DHEA administration. In contrast, 17beta-estradiol and estrone significantly increased in a dose-dependent manner to concentrations still within the upper normal range for men [placebo vs. 50 mg DHEA vs. 100 mg DHEA; AUC 0-12 h for 17beta-estradiol, 510 +/- 198 vs. 635 +/- 156 vs. 700 +/- 209 pmol/L x h (P < 0.0001); AUC 0-12 h for estrone, 1443 +/- 269 vs. 2537 +/- 434 vs. 3254 +/- 671 pmol/L x h (P < 0.0001)]"
  12. Estrogen: The Unrecognized Male Hormone - IAS
  13. Biotransformation of oral dehydroepiandrosterone in elderly men: significant increase in circulating estrogens - J Clin Endocrinol Metab 1999 Jun;84(6):2170-6 - "Serum testosterone and dihydrotestosterone remained unchanged after DHEA administration. In contrast, 17beta-estradiol and estrone significantly increased in a dose-dependent manner to concentrations still within the upper normal range for men [placebo vs. 50 mg DHEA vs. 100 mg DHEA; AUC 0-12 h for 17beta-estradiol, 510 +/- 198 vs. 635 +/- 156 vs. 700 +/- 209 pmol/L x h (P < 0.0001); AUC 0-12 h for estrone, 1443 +/- 269 vs. 2537 +/- 434 vs. 3254 +/- 671 pmol/L x h (P < 0.0001)]" - That's a 40% increase in the bad estrogen!  On top of that, if you are taking testosterone, that increases estrogen also.
  14. Aromatase Inhibition Corrects Endocrinopathy In Infertile Men - Doctor's Guide, 4/9/01 - "investigators found that men with severe infertility had significantly lower testosterone (328 versus 543 ng/dl) and significantly higher oestradiol (58.4 versus 43.5 ng/l) than the fertile controls. As a result, the infertile men had much lower testosterone-to-oestradiol ratios ... These abnormalities were corrected in the 45 men who received testolactone and their testosterone-to-oestradiol ratios rose into the normal range"
  15. Evidence of a Treatable Endocrinopathy in Infertile Men - J. of Urology, 3/01 - "We identified an endocrinopathy in men with severe male factor infertility that is characterized by a decreased serum testosterone-to-estradiol ratio. This ratio can be corrected by aromatase inhibition, resulting in a significant improvement in semen parameters in oligospermic patients"
  16. Replenish Testosterone Naturally - Life Extension Magazine, 1/00 - "Through a variety of mechanisms, aging men suffer from the dual effects of having too little testosterone and excess estrogen. The result is a testosterone/ estrogen imbalance that can severely inhibit sexual desire and performance ... Too much estrogen plays havoc with a man's sex life by binding to testosterone receptor sites and may contribute to the over-production of SHBG. SHBG binds free testosterone in a way that makes it unavailable to receptor sites in the brain, nerves and genitals."
  17. Estrogen suppression in males: metabolic effects - J Clin Endocrinol Metab. 2001 Apr;86(4):1836-8 - "First, a dose-response study of 12 males (mean age, 16.1 +/- 0.3 yr) was conducted, and blood withdrawn at baseline and after 10 days of oral Arimidex given as two different doses (either 0.5 or 1 mg) in random order with a 14-day washout in between. A sensitive estradiol (E2) assay showed an approximately 50% decrease in E2 concentrations with either of the two doses ... There was a 58% increase in serum T"
  18. Arimidex - Rxlist.com - "ARIMIDEX 1 mg, reduced estradiol by approximately 70% within 24 hours and by approximately 80% after 14 days of daily dosing"
  19. I take a quarter tablet of letrozole (generic Femara) to prevent aromatization/gynecomastia.  See letrozole at OffshoreRx.com.

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