One or two drinks a day can raise the risk of developing hypertension in some men, according to two Japanese studies.
The studies, published in the July issue of Alcohol: Clinical Experience and Research, found that men who had as few as one or two glasses of alcohol on a regular basis had a much higher incidence of hypertension than those who did not drink at all.
Several U.S. studies have found that moderate drinking habits can actually decrease the risk of heart disease. American studies have also found that regular alcohol consumption does not affect hypertension risk below a threshold of three to six drinks.
Two general differences between Japanese and American populations may help explain the aberrant findings of these studies.
First, there is significantly more obesity in the United States than in the Japanese population. A higher blood-alcohol level can be expected in a lower-weight population at similar drinking levels, potentially resulting in a lower threshold effect.
Second, about 50 percent of Japanese people have a genetic defect that affects the metabolism of alcohol. However, recent studies of this defect have found no effect on risk of hypertension.
In the first Japanese study, Susumu Ohmori, M.D., and colleagues at Kyushu University found that up to a point, the incidence of hypertension rose with the amount of alcohol men drank.
Ex-drinkers, who had not had a drink within three months, were still nearly twice as likely to develop hypertension as men who did not drink at all. Those who drank a moderate amount on a regular basis had an even higher incidence and those who had more than a couple of drinks a day had about a threefold higher incidence of high blood pressure than non-drinkers.
The study included 1,101 residents of Hisayama Town, a suburban community. The researchers studied the subjects over a 10-year span. The study included men and women, but the heightened risk of hypertension was found only in the men.
Ohmori and colleagues say, "Regular drinking, including even low levels of consumption, was found to be a significant risk factor for the onset of hypertension in a general population of Japanese men."
The second study included only male office workers, but produced strikingly similar results.
Men who averaged even just one drink a day had a 20 percent to 30 percent increased incidence of hypertension, depending on their age at the beginning of the study. The more they drank, the higher their risk, falling just shy of a threefold increase among the heaviest drinkers, found Noriyuki Nakanishi, M.D., of Osaka University Graduate School of Medicine, and associates.
The study included 3,784 men who did not have hypertension at the beginning of the study. Nearly 1,000 developed hypertension during four years of follow-up.
Both studies note that they lacked any dietary or nutritional information on their subjects, another possible source of hypertension risk.
However, Nakanishi and colleagues conclude that their findings "suggest that the risk for hypertension increases in a dose-dependent manner as alcohol intake increases in both young and middle-aged Japanese men and that light to moderate alcohol consumption has an important influence on [blood pressure] in Japanese men."
The study was funded by the Arteriosclerosis Prevention Association in Tokyo.
Europe’s Demographic Future. Where the Regions Are Heading after a Decade of Crises
10.08.2017 | Berlin-Institut für Bevölkerung und Entwicklung
Scientists reveal source of human heartbeat in 3-D
07.08.2017 | University of Manchester
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
17.08.2017 | Physics and Astronomy
17.08.2017 | Earth Sciences
17.08.2017 | Physics and Astronomy