08.31.09
Pomegranate Juice
Pomegranate juice has become a very popular new drink among the health-conscious in the last few years. Indeed there is an interesting body of research about this fruit, including indications that it may help lower “bad [LDL] cholesterol,” or that it may slow progression of prostate cancer. One caution, however: pomegranate juice may interact with certain drugs, in particular blood pressure-lowering drugs. For that reason, it’s advisable for anyone taking prescription drugs to consult with their health care provider before adding pomegranate juice to their daily routine.
NYBC stocks a pomegranate juice concentrate, which can be mixed with other beverages. Using a concentrate such as this can be significantly less costly than buying the well-known juice brands from your local grocery or health food store.
Here’s the basic NYBC entry:
Pomegranate Juice CONCENTRATE (Jarrow) Each bottle, 12 oz (355 ml) of 100% pomegranate juice concentrate. This is one of the most powerful sources of antioxidants, superior even to blueberries and strawberries. Derived from a California variety, this juice is concentrated to a level of 4 times that of ordinary pomegranate juice…it is thick! The antioxidants found in the juice include ellagic and gallic acid, anthocyanins and tannins, and punicalagin. Punicalagin is perhaps the most powerful. Various studies suggest that this may help to improve the level of glutathione in cells (see the entries on NAC and glutathione), particularly macrophages. It may have benefit for maintaining platelet levels, lowering LDL and sustaining vascular tone.
You can read more in the full entry:
08.28.09
Red wine, resveratrol and cancer prevention
Research on resveratrol, a compound found in red wine, continues to draw media attention, especially as biotech companies in recent years have poured millions into potential patentable compounds that could have dramatic “anti-aging” properties. One of the most interesting health effects of resveratrol is its anti-cancer power, and so we recently decided to stop in at the National Cancer Institute/National Institutes of Health general information page on red wine, resveratrol and cancer prevention, just to see how this particular aspect is being presented. This federal government site aims to keep up with reseach trends in cancer prevention (though actually this particular fact sheet seems a bit behind the curve), and usually provides a quite cautious viewpoint on the evolving research. Here’s a short extract:
The cell and animal studies of red wine have examined effects in several cancers, including leukemia, skin, breast, and prostate cancers. Scientists are studying resveratrol to learn more about its cancer preventive activities. Recent evidence from animal studies suggests this anti-inflammatory compound may be an effective chemopreventive agent in three stages of the cancer process: initiation, promotion, and progression.
Research studies published in the International Journal of Cancer show that drinking a glass of red wine a day may cut a man’s risk of prostate cancer in half and that the protective effect appears to be strongest against the most aggressive forms of the disease. It was also seen that men who consumed four or more 4-ounce glasses of red wine per week have a 60 percent lower incidence of the more aggressive types of prostate cancer.
However, studies of the association between red wine consumption and cancer in humans are in their initial stages. Although consumption of large amounts of alcoholic beverages may increase the risk of some cancers, there is growing evidence that the health benefits of red wine are related to its nonalcoholic components.
You can read more at
http://www.cancer.gov/cancertopics/factsheet/prevention/redwine
08.12.09
B vitamins and brain function: the latest studies
The evidence continues to pile up that levels of the B vitamins, in particular B6 (pyridoxine), B9 (folate), and B12 (cyanocobalamin), are closely related to maintaining cognitive function and warding off brain-related disorders like Alzheimer’s as we age. Well-designed studies, including the Veterans Affairs (VA) Normative Aging Study, have pointed particularly to Vitamin B deficits being associated with buildup of homocysteine, which in turn may be responsible for impairment to cognitive function.
B Vitamins are central to the preservation of mental capacities as we age. At the same time, the aging digestive system may not absorb nutrients as effectively as it once did; so an obvious strategy is to consider B complex supplementation as well as good dietary habits as we get older.
Read more on the B vitamins on the NYBC site:
B-right (Jarrow) We selected this as a good comprehensive B vitamin supplement.
B-12 Methylcobalamin (Jarrow) Studies have suggested that this is a very effective way to supplement with B12, which may not always be well-absorbed by the body when taken in other formats.
Some References:
Kim JM, Stewart R, Kim SW Changes in folate, vitamin B12 and homocysteine associated with incident dementia. J Neurol. Neurosurg. Psychiatry 2008;79;864-868.
Tucker KL, Qiao N, Scott T, et al. High homocysteine and low B vitamins predict cognitive decline in aging men: the Veterans Affairs Normative Aging Study. Am J Clin Nutr. 2005 Sep;82(3):627-35.
Wang HX, Wahlin A, Basun H, et al. Vitamin B12 and folate in relation to the development of Alzheimer’s disease. Neurology 2001;56:1188-94.
Low vitamin D common among HIV+ people
Poz magazine reports on a study revealing a high degree of vitamin D deficiency among people with HIV. The data are piling up on the significance of this inexpensive vitamin. Vitamin D deficiency is particularly widespread among African Americans.
See http://www.poz.com/rssredir/articles/hiv_vitamind_bone_761_17003.shtml