Sunday, March 13, 2011

Western and Chinese medicine studying acupuncture: Difference

For a long time, I've noticed one big difference betweeen traditional Chinese medicine and western medical science in studying acupuncture: the latter almost always fails to specify the acupuncture points. People with basic knowledge of acupuncture, in fact, both acupuncture and moxibustion (AM), know that different acupuncture points serve different purposes, much like different drugs treat different diseases. Since western science publications list herb names when they're used in the research, and names of the AM points are already internationalized, I don't see why the names are not generally listed in equally scrutinized research papers.

Thursday, February 10, 2011

Effect of Light at Sleep on Health

I'm interested in two issues related to light at sleep: lower limit in intensity of light not affecting child's growth, and effect on risk of cancer. I didn't find an article directly discussing the relationship of light to secretion of growth hormone (GH). But since GH and melatonin secretions are related ("Melatonin stimulates growth hormone secretion through pathways other than the growth hormone-releasing hormone"), and the effect of light intensity on melatonin is regularly studied, we can focus on the latter. This letter, by Steven Lockley, a Harvard Medical School doctor, shows the change of melatonin suppression in relation to light intensity (see Fig 1(B)). You can see when the light intensity reaches 50 lux, the level of melatonin quickly starts to be suppressed until about 200 lux.[note] In plain English, if you need a better night sleep, and growth for the child, the light should be kept below 50 lux. According to Wikipedia, 50 lux is about the light intensity you get at your "Family living room". So I believe unless there's direct light shining on your eyelids, as those from your night lights or street lights, you should have a piece of mind. If you must have some light, such as that on your digital clock, make sure it's red, which is at almost the exact opposite of blue in visible light spectrum. Again according to Wikipedia, the blue light has the most detrimental effect on melatonin secretion. Now you know why those clocks are red.

Light at sleep is also known to increase the risk of cancer, the most studied type of which may be breast cancer. See Dr. Weil's short note, and this 2005 article.
______________
[note] Other researchers did similar experiments, e.g., J.M. Zeitzer et al. in Am. J. Physiology in 2005. See its Fig 1(B). Their melatonin suppression onset started earlier at about 10 lux. But they had fewer data points.

Friday, December 3, 2010

Fat at buttock and thigh is good?

University of Oxford researcher's June 2010 article Gluteofemoral body fat as a determinant of metabolic health is generally cited by popular health science articles as saying it's a good thing to have gluteofemoral fat, or fat at buttocks and thighs. I wonder if it's a misreading. It seems to me the article is saying if you must have excessive fat, you would rather have it at gluteofemoral position, because it's a good place to store it. If we could find two identical people except for the fact that one is generally lean in the whole body and the other has a great amount of gluteofemoral fat, should we say the latter is more likely to be healthy?

Thursday, November 25, 2010

Many Scented Cleaning Products Contain Toxic Chemicals

Dr. Weil's report on a recent medical research:
http://www.drweil.com/drw/u/WBL02222/Many-Scented-Cleaning-Products-Contain-Toxic-Chemicals.html
"They detected 133 chemicals in 25 popular products they analyzed, including laundry detergents, fabric softeners, dryer sheets, soaps, hand sanitizers, lotions, deodorants, shampoos and air fresheners...All the products emitted at least one chemical classified as toxic or hazardous,... and 11 of them emitted at least one chemical considered a probable carcinogen"
Dr. Weil's "Natural Household Cleaning Products" at
http://www.drweil.com/drw/u/ART00580/natural-household-cleaning-products.html 
is useful.

The original research article is titled Fragranced consumer products: Chemicals emitted, ingredients unlisted, whose abstract says "For 'green' products, emissions of these compounds were not significantly different from the other products."

Monday, November 8, 2010

Moles linked with slower aging

The report Moles linked with slower aging prompted me to find the original article. It's in the July 2007 edition of Cancer Epidemiology Biomarkers & Prevention, "Nevus Size and Number Are Associated with Telomere Length and Represent Potential Markers of a Decreased Senescence In vivo". "Nevus" includes moles and other types of birthmarks. "Telomere" is the free-moving end of a chromosome; the longer the "telomere", the better, e.g. slower aging and possibly (not confirmed) lower risk of cancer. "Senescence" means aging. The study only includes white women. But we hope the link between more and bigger moles on your body and slower aging, also exists for people that are not white and female, and I wish the researchers had commented whether cosmetically removing the moles affects the mole count.