In the Nurses’ Cohort Study that followed 81,722 women from 1984 to 2010, questionnaires were assessed every 2 to 4 years. The Mediterranean diet includes a high intake of fruits, vegetables, nuts, whole grains, fish and moderate alcohol. The study found an inverse association between all 4 low-risk lifestyle factors and a lower risk of sudden cardiac death. Women at low risk for all 4 lifestyle factors had a 92% lower risk of sudden cardiac death than women at low risk for none of the lifestyle factors.

Commentary: Researchers commented that 79% of sudden cardiac death may be due to unhealthy lifestyle practices in women who do not have a diagnosis of coronary heart disease. Sudden cardiac death causes more than 50% of all the cardiac deaths and is occurs more often in women. These study results will hopefully motivate us to live healthier lifestyles.

Reference

Chiuve S, Fung T, Rexrode K, et al. Adherence to a low-risk, healthy lifestyle and risk of sudden cardiac death among women. JAMA 2011;306(1):62-69.

The incidence of type A influenza was significant and widespread in Japan through the study period of November 2008 to February 2009. A total of 2050 schoolchildren were included in the final analysis. The number of episodes of clinical influenza that were reported was 241, and 204 of those were confirmed by an antigen test. There were 185 cases of influenza A, 18 of influenza B and 1 case of combined.

More than 50% of the 2050 respondents drank green tea more than 6 days/week and 77.3% of the students drank < 1 cup a day and 1 to < 3 cups per day with approximately equal numbers of students in each group.

The consumption of 1-5 cups of green tea on an almost daily basis of 6 or more days/week was inversely associated with the incidence of influenza in this group of elementary schoolchildren. There was no evidence that more than 5 cups per day had any benefit for some reason.

Commentary: I am aware of six other studies on the prevention of influenza with green tea, including the previous blog posting in February, on my blog site. Collectively, these studies show that green tea inhibits the influenza virus in the laboratory, enhances systemic immunity in humans, and prevents the occurrence of cold and flu symptoms in adults. Drinking green tea and gargling with green tea are the methods that have been studied but for those of you who do not like or do not want to take the time to drink green tea, green tea capsules are another way to get the potential benefits of green tea.

Reference

Park M, Yamada H, Matsushita K, et al. Green tea consumption is inversely associated with the incidence of influenza infection among schoolchildren in a tea plantation area of Japan. J Nutrition 2011;141:1862-1870.

About two hundred health care workers in three different healthcare facilities in Japan were randomized to receive either a placebo or a combination of green tea catechins and theanine that contained 378 mg/day of catechins and 210 mg/day of theanine, both constituents found in green tea.

Of these eligible health care workers, 98 received the green tea and 99 received the placebo. The incidence of clinical signs and symptoms of influenza infection was significantly lower in the green tea (4.1%) group compared with the placebo group (13.1%).

Commentary:

The catechins and theanine in green tea have shown previous promise as a strategy for preventing influenza infections. In the laboratory, experiments have shown that green tea catechins can prevent influenza infection. A small study was then done that reported that gargling with tea catechins extracts was effective in preventing influenza infection in the elderly individuals in nursing homes. Green tea extracts have also been shown to enhance systemic immunity and prevent upper respiratory infections and influenza symptoms in adults. Based on this preliminary research, the more substantial randomized, double-blind study was done on the effectiveness of green tea catechins and theanine in preventing influenza infections. This is an extremely useful, simple, safe method of reducing the incidence of influenza. I will be advising my patients to take a standardized extract of green tea capsule regularly and/or drinking green tea liberally, especially during flu season.

Reference

Matsumoto K, Yamada H, Takuma N, et al. Effects of green tea catechins and theanine on preventing influenza infection among healthcare workers: a randomized controlled trial. BMC Complementary and Alternative Medicine 2011; 11:15

We often talk of exercise programs, gym memberships and exercise classes of all kinds, but it starts with… we just don’t move as much as we used to. Most of us are not living on farms and ranches, not hauling hay or planting, foraging and picking our food, not hauling and chopping our firewood, and not building our shelters. Most of us aren’t even playing outside anymore. Too many of us have acquired the thought that all our needs can be met by a flip of a switch or an indoor environment. Again, too many of us press the garage door opener, put our clothes in the washing machine and our dishes in the dishwasher, watch TV and play/work on the computer, take an elevator or escalator to our destination and park right in front of the store.

In addition to this lack of physical activity in our daily life, most individuals in modern America have sedentary jobs where we sit most of the work week– talking on the telephone, typing, writing, working on the computer, talking with clients or patients or working at the check out counter.

Our bodies are made to move and actually can do it quite well, but sadly, most us do not have any kind of routine exercise and have a bevy of excuses to support our choice—not enough time, too cold, too wet, too dark, too tired, too many aches and pains, and on and on. I’ve had them myself at times.

In working with patients, I take a gentle yet tough love approach full of support and empathy and education… it is useful to ask questions, find the limitations and obstacles, try to find out what they might like, try to strategize the practicalities, set goals, motivate and inspire and never give up on the potential for change. The tough love part is trying to find ways to make them realize that moving/exercising should be considered a mandatory part of their life. I even say some times… “You have got to get religion about exercise”. Some helpful keys to the process can be: 1) Focus on the fact that you can do it– you can become someone who regularly exercises. 2) Make a schedule for when it is going to happen. Each day… I plan for when I am going to get my 60 minutes of exercise in for that day and even the next. “Oh… on my lunch hour I can walk to the hardware store, shop for light bulbs, walk back to the office (that’s 30), and then I have another 30 minute walk after work— either to the grocery store after work, or on a forest trail next to my house once I get home. 3) Maybe find an exercise partner or a personal trainer or a class or a team of some kind– even for those who are not athletically inclined— paddling on a “dragon boat” team might be just the ticket. 4) Set goals and make them a priority– and set goals that are realistic. 5) Know your limits and don’t injure yourself or make a chronic health problem worse.

According to the American Heart Association and to reduce the risk of chronic disease we need to have 30 minutes of moderately intense physical activity per day most days of the week. For those women who need to lose significant weight… it will probably take more than that to overcome the physiological forces that are now in play– insulin resistance, slowed metabolism, loss of muscle mass and aging. In my women patients who desire weight loss… our goal is 60+ minutes per day of aerobic exercise (walking, treadmill, elliptical, bicycle, running) for 6-7 days per week and ideally, some kind of strength training (yoga, weight training) 2 days per week.

With education, desire, and a plan…. You can succeed!! You can make a change! You can improve the quality of your life!

The levels of L. crispatus colonization were evaluated with a vaginal swab and their UTI status was followed at 1 and 10 weeks. Women in both groups had depletion of Lactobacillus colonization. At week 10, at least one UTI had occurred in 15% of the L. crispatus individuals versus 27% in the placebo individuals. A high level of L. crispatus colonization was achieved in 93% of the crispatus subjects versus 68% of the placebo subjects. The risk for a recurrent UTI was lower in the women who received L. crispatus versus placebo, in those with high colonization.

Commentary: UTIs are very common in women and more than half of women in the U.S. will experience at least one in their life. Ten to twenty percent of all women have a UTI at least once a year. The use of antibiotics for UTIs potentially adds to the problem, in that drug resistance occurs, and the antibiotic itself depletes the vaginal and bladder lactobacillus species that serve to prevent UTIs. Normal vaginal flora is dominated by hydrogen peroxide producing lactobacilli that competitively inhibit the infection causing bacteria of the urethra and bladder, particularly Escherichia coli. The question these researchers asked was, can a hydrogen peroxide producing vaginal probiotic prevent recurrent UTIs. The answer is, yes they can- and in this case, Lactobacillus crispatus was the test subject.

Reference

Stapleton A, et al. Randomized, placebo-controlled phase 2 trial of a Lactobacillus crispatus probiotic given intravaginally for prevention of recurrent urinary tract infection. Clin Infect Dis 2011; May 15; 52:1212

Approximately half of the women rarely ate chocolate and 36% ate it weekly and 17% ate it daily. Women who consumed chocolate frequently were much less likely to be hospitalized for atherosclerotic vascular disease, or even die from it, than were women who consumed chocolate rarely. Women who ate chocolate frequently were also significantly less likely to develop ischemic heart disease, congestive heart failure and plaques in the carotid artery.

Other research results and higher intake of flavonoids, including chocolate, from prior studies have also shown an association between higher chocolate intake and improved cardiovascular outcomes. Cocoa is rich in flavonoids and is the principal ingredient in cocoa. While a high quality randomized double-blind trial could confirm these observational studies… it might indeed be difficult to find women who would be willing to be in the placebo group rather than the chocolate group. For now… I encourage women to eat 1-2 oz or greater than 70% dark chocolate at least once per week; I vote for 1 oz daily!!!

Reference

Lewis J, et al. Habitual chocolate intake and vascular disease: A prospective study of clinical outcomes in older women. Arch Intern Med 2010 Nov 8; 170:1857.

The JELIS (Japan EPA Lipid Intervention Study) trial [4] included a total of 18,645 subjects (men aged 40-75 and postmenopausal women aged > 75 and a mean age of 61 years and 31% men). Those with a serum total cholesterol level of > 250 mg/dL were eligible. About 36% were hypertensive, 15% had diabetes and 20% had coronary artery disease. Subjects were randomized to pravastatin 10mg/day or simvastatin 5mg/day or the same statin doses with 1,800 mg/day of EPA. After 5 years, those in the EPA group had a 19% reduction in major cardiac events.

These three trials indicated that omega-3 PUFAs lowered the risk of CV disease in both primary and secondary prevention. While not all studies have shown favorable results, the numbers of patients treated, the doses used, and the results of the DART, GISSI and JELIS study are strong motivations to increase dietary fish intake and especially fish oil supplementation. In order to test and remove heavy metals, pesticides, other environmental contaminants and microbes, look for products that can produce independent third part testing for each lot of supplements.

Recommended doses for primary and secondary prevention:

1,000 mg/day of combined EPA/DHA

References:

[1] Harris W, Poston W, Hadock C. Tissue n-3 and n-6 fatty acids and risk for coronary heart disease events. Atherosclerosis 2007;193:1-10.

[2] Burr M, Fehily A, Gilbert J, et al. Effects of changes in fat, fish, and fibre intakes on death and myocardial reinfarction: Diet and Reinfarction Trial (DART). Lancet 1989;2:757-761.

[3] Dietary supplementation with n-3 polyunsaturated fatty acids and vitamin E after myocardial infarction: results of the GISSI. Lancet 2001; 357;642 and Lancet 2007;369:106 and Lancet 1999;354;447-455.

[4] Yokoyama M, Origasa H, Matsuzaki M, et al. Effects of eicosapentaenoic acid on major coronary events in hypercholesterolaemic patients (JELIS): a randomised open-label, blinded endpoint analysis. Lancet 2007;369:1090-1098.

During the three months before pregnancy or the first month of pregnancy, mothers of children with autism were less likely than those of typically developing children to report having taken prenatal vitamins. In addition, there were greater risks for autism observed in some of the metabolic genetic variants, in those mothers who did not take prenatal vitamins preconception and/or in the first month. In short, the use of prenatal vitamins, taken preconception, may reduce the risk of having children with autism, especially for genetically susceptible mothers and children.

Commentary: Attention is being increasingly given to the preconception time period and the health and nutritional status of the mother in particular. This is distinct from the use of vitamins/minerals/herbs to enhance fertility in men and women. I’m encouraged to see research in this area, and to see positive results, in something as simple and affordable as prenatal vitamins is especially reassuring, and in something as daunting as autism, with the incidence increasing and as yet with an unclear cause. According to “Autism Speaks”, a leading science and advocacy organization, it is estimated that 1 in 110 children in US are diagnosed with autism. Government statistics suggest the prevalence rate of autism is increasing 10 to 17 percent annually. We clearly need to become more aggressive in understanding the potential causes and influences on autism, and be assertive in any prevention strategies that can reduce the incidence.

Reference

Schmidt R, Hansen R, Hartiala J, et al. Prenatal Vitamins, One-carbon Metabolism Gene Variants, and Risk for Autism. Epidemiology; July 2011 – Volume 22 – Issue 4 – pp 476-485

The list is long for the consequences of a magnesium deficiency. Magnesium deficiencies can result in hypokalemia (low potassium), alkalosis, hypertension, congestive heart failure, arrhythmia, myocardial infarction, angina pectoris, clotting, atherosclerosis, type 2 diabetes, preeclampsia and other electrolyte deficiencies. [2]

Magnesium deficiency can be acquired many ways. A decrease in dietary consumption of magnesium has gone from 500mg/day in 1900 to 215-283 mg/day in 1990.[3]^{, [4]} It is estimated that the typical dietary intake of magnesium today in the U.S. provides only 35-75% of the recommended daily amount.[5]

Many over the counter and prescription drugs can influence magnesium nutrient levels and depletion. The list is long, but includes loop and thiazide diuretics, digoxin, carboplatin and cisplatin, corticosteroids, estrogen and oral contraceptives, insulin, proton pump inhibitors, tetracyclines, cyclosporine, laxatives and more.1 Advanced age is also associated with decreased serum and tissue magnesium levels.

Perhaps one of the more common problems with magnesium results in the relationship of calcium and magnesium. High calcium diets or calcium supplementation without attention to magnesium supplementation has been shown to decrease tissue magnesium levels, [6] increase magnesium requirements[7] and decrease magnesium absorption.[8] In individuals with low or suboptimal magnesium status, administration of calcium without concomitant magnesium may further compromise their magnesium status, further increasing their risk of the many of the health risks associated with magnesium insufficiency/deficiency that we have mentioned earlier.

Convenient serum testing for magnesium is usually inadequate because it does not reflect magnesium stores. Less convenient but more accurate testing would include a magnesium-loading test looking at 24-hour urinary magnesium excretion after an infusion of magnesium. Magnesium can also be measured in red blood cells, white blood cells, mononuclear blood cells, and muscle. An intracellular mineral electrolyte panel using cell scrapings under the tongue with electronic photon bombardment technology is available as well.

Supplementing the body’s magnesium stores through oral supplementation takes about six weeks but may be up to six months or more. [9]^,[10] Many different magnesium salts are available as supplements. Magnesium oxide contains the largest amount of elemental magnesium. Magnesium chloride has high bioavailability. Magnesium may also be bound to aspartate, malate, succinate, fumarate, citrate, gluconate, sulfate and chloride. Some manufacturers assert that magnesium chelated to malate, succinate, fumarate or citrate are better absorbed, utilized and tolerated, but this is variable and not definitive.

Given the prevalence of hypertension, congestive heart failure, arrhythmias, ischemic heart disease, heart attacks and type 2 diabetes in the U.S., magnesium has emerged as a very critical supplement for prevention and management of these conditions. Intervention doses vary from 250 mg/day to 1,000 mg/day depending on the condition, body weight, age, and tolerability. Individuals with kidney disease or heart blocks should not take magnesium unless under a physician’s supervision. Magnesium is generally well tolerated, although there is often a dose limiting amount above which causes loose stool.

Magnesium is an essential mineral for normal body physiology. Deficiencies and insufficiencies are more common than is easily detected, and may lead to numerous cardiovascular disorders, type 2 diabetes, preeclampsia and eclampsia.

In most cases, I recommend that calcium supplementation should also include magnesium supplementation and a ration of approximate 2 parts calcium: 1 part magnesium. Current reference guidelines for daily intake for your age and gender can be obtained from the Institute of Medicine or from www.nutrition.gov. It is important to keep in mind the dietary supplement dosages are in addition to the average daily amount you are getting in your diet, to achieve the recommended daily amount.

References

[1] Dacey M. Hypomagnesemic disorders. Crit Care Clin. 2001;17:155-173.

[2] Gums J. Magnesium in cardiovascular and other disorders. Am J Health-Syst Pharm 2004;61:1569—76.

[3] Kawano Y, Matsuoka H, Takishita S, et al. Effects of magnesium supplementation of hypertensive patients: assessment by office, home, and ambulatory blood pressures. Hypertension. 1998;32:260-5.

[4] Arsenian M. Magnesium and cardiovascular disease. Prog Cardiovasc Dis. 1993; 35:271-310.

[5] Altura B, Altura B. Magnesium and cardiovascular biology: an important link between cardiovascular risk factors and atherogenesis. Cell Mol Biol Res. 1995;41:347-59.

[6] Smith K, Luhrsen K. Trace mineral interactions during elevated calcium consumption. Fed Proc 1986;45:374.

[7] O’Dell BL, Morris ER, Regan WO. Magnesium requirement of guinea pigs and rats. Effect of calcium and phosphorus and symptoms of magnesium deficiency. J Nutr 1960;70:103-111.

[8] Clarkson E, Warren L, McDonald S, de Wardener H. The effect of a high intake of calcium on magnesium metabolism in normal subjects and patients with chronic renal failure. Clin Sci 1967;32:11-18.

[9] Hollifield J. Thiazide treatment of hypertension: effects of thiazide diuretics on serum potassium, magnesium, and ventricular ectopy. AmJ Med. 1986;80 (suppl 4A): 8-12.

[10] Whang R, Ham;pton E, Whang D. Magnesium homeostasis and clinical disorders of magnesium deficiency. Ann Pharmacother. 1994;28:220-6.

Premenopausal women appear to be more sensitive at detecting breast cancer when done during the first week of the menstrual cycle (day 1 of the menses to day 7) in women with a history of screening mammograms. Researchers analyzed 387,218 screening mammograms in premenopausal women that were associated with 1,283 breast cancers. Greater sensitivity was found in week 1 (79.5%) compared to week 2 (70.3%), week 3 (67.4%) or week 4 (73%). Oddly, in the small percentage of women who were getting a screening mammogram for the first time, the sensitivity was lower during week 1 (72.1%) than in week 2 (80.4%), week 3 (84.6%) and week 4 (93.8%).

Comments: Premenopausal women do tend to have denser breasts than postmenopausal women, due to more estrogen in their system. This is known to make it more difficult for mammography to detect small tumors. The results of this study, at least in the women with a history of screening mammograms, makes sense as the breast density may be less in the first part of the menstrual cycle when estrogen is the lowest.

Reference: Miglioretti D, Walker R, WEaber D, et al. Accuracy of screening mammography varies by week of menstrual cycle. Radiology 2011; 258(2):372-379.

In another study, from Spain, digital mammography results were compared with traditional screen film mammography and investigators found a lower false-positive rate in the digital mammography. After reviewing 242,838 mammograms (171,191 screen-film mammograms and 71,647 digital mammograms) from 103,613 women ages 45 to 69. The screen film mammograms had a 32% higher false-positive rate than the digital mammography. This was a false-positive rate of 7.6% in screen films and 5.7% in digital, although there was no significant difference in the overall cancer detection rate between the two groups.

Comments: The results of this study are not surprising. Digital mammography has been an important step in the evolution of mammography. It has been shown to be superior in contrast of normal vs. abnormal tissue with increased diagnostic quality of images, increased sensitivity particularly in dense breasts and a better ability to store images and transmit images electronically.

Reference : Sala M, Salas D, Belvis F, et al. Reduction in false-positive results after introduction of digital mammography analysis from four population-based breast cancer screening programs in Spain. Radiology. 2011;258(2):388-395.