Coffee has been shown to improve memory, drinking several cups of coffee a day can reduce the risk of suicide

Recently, researchers from Johns Hopkins University and other institutions have found that caffeine can not only help people wake up, but also help improve memory. The study, published in the journal Nature Neuroscience, tested 160 people over a 24-hour period, targeting those who ate or drank caffeinated products infrequently.

Coffee has been shown to improve memory.

After measuring caffeine levels in the subjects' saliva, the researchers asked everyone to look at some photos. Five minutes later, some people were given pills containing 200 milligrams of caffeine (equivalent to the amount of caffeine in a large cup of coffee), while others were given a placebo pill without caffeine. Saliva was tested again 1 hour, 3 hours and 24 hours after taking the pill.

On the second day, the testers of the two groups conducted a picture test about identifying the day before. Although 24 hours may not sound like a long time, memory studies show that most people forget within a few hours of memory. It turned out that those who took caffeine pills did better on memory tests than those who took only placebos.

However, experts also warn against rushing to drink a lot of coffee because of this result, keeping in mind that caffeine can have certain side effects on the body, such as nervousness or anxiety.

Drinking several cups of coffee a day can reduce the risk of suicide

Coffee and suicide seem to have nothing to do with each other, but a new study published in World J Biol Psychiatry 2013 Jul 2 ties the two closely together. Drinking several cups of coffee a day can reduce the risk of suicide by 50%, and it is suitable for both men and women, according to the study.

The study aimed to assess the relationship between coffee and caffeine use and suicide rates in three large cohorts in the United States. Researchers from Harvard University obtained data from 43599 men from the Health Professionals follow-up study (HPFS,1988-2008), 73820 women from the Harvard Nurses' Health Research Program (NHS,1992-2008) and 91005 women from the Harvard Nurses' Health Research Program Ⅱ (NHS II, 1993). Subjects' use of caffeine, coffee and non-caffeinated coffee was assessed using a certified dietary frequency questionnaire every four years, while suicides were determined by clinicians based on death data. The researchers used the Cox proportional hazard model to estimate the multivariate adjusted relative risk (RRs) and the random effects model to summarize the RR values of each cohort.

Drinking several cups of coffee a day can reduce the risk of suicide

The results showed that there were 277 suicides during the study period. Compared with people who consumed less than 1 cup of caffeinated coffee per week (less than 8 ounces / 237ml), the aggregate multivariate suicide RR values were as follows: drinking 2-3 cups of coffee per day, 95%CI 0.55 (0.38-0.78), 95%CI 0.47 (0.27-0.81), P