Islamabad - Three cups of coffee a day may help people with chronic kidney disease live longer, new research suggests.

A new study that followed more than 2,300 patients for 12 years found those who drank plenty of the beverage slashed their risk of dying by a quarter. One or two cups also increased the participants’ chances of survival by 12 and 22 percent, respectively, compared to those who never touched it. Portuguese researchers believe their results suggest advising patients with chronic kidney to disease to drink more coffee.

Dr Miguele Bigotte Vieira, of North Lisbon Hospital Centre, said: ‘Our study showed a dose-dependent protective effect of caffeine consumption on mortality among patients with chronic kidney disease.

‘These results suggest advising patients with chronic kidney disease to drink more caffeine may reduce their mortality.’

A study that followed more than 2,300 patients for 12 years found those who drank plenty of the beverage slashed their risk of dying by a quarter

Kidney disease affects nearly two million in the UK, and five million have been diagnosed in the US. It is most common among the elderly.

Patients are at a much higher risk of having a heart attack or stroke as the condition leads to the accumulation of fatty deposits in arteries. Described as a ‘silent killer’ because awareness is low, it can also lead to kidney failure.

The new findings were presented at the American Society of Nephrology Kidney Week conference in New Orleans.  The EU’s food safety watchdog advised a daily limit of 400mg for adults in its first guidelines on caffeine intake in 2015. European Food Safety Agency officials suggested pregnant women should keep intakes below 200mg.

It also advised children to consume no more than 3mg of caffeine per KG of body weight - the equivalent of two mugs of milky tea for a child of four. Health officials warned those who break the limits run the risk of a host of health problems, from anxiety to heart failure.

Its warning also showed links between high caffeine intake in pregnancy and having a baby that is underweight.The NHS says too much caffeine can cause a miscarriage. There are also links to birth defects.

However, with coffee far from the only food or drink to contain caffeine, people may unintentionally be going over the safe limit.

It was based on consumption and death rates among 2,328 US patients taking part in a national survey between 1999 and 2010.

Compared with those who never or rarely drank the beverage, participants who consumed two reduced their risk of dying during the study by 12 per cent.

Three cups was linked to a 22 per cent decreased risk, and anymore than this was found to slash the risk by 24 per cent.

Meanwhile, another study suggests that it’s not the amount of time but the ways young adults use social media that may lead to poor mental health, according to a new study.

Researchers from two Florida universities found that social media habits like closely so-called ‘vaguebooking’ - writing intentionally vague but often evocative social media posts - were linked to suicidal thoughts.

Using social media this way functions as a cry for help, but other young adults get a confidence boost form social media, the study authors say. 

Their findings suggest that mental health is influenced significantly by financial and familial stressors than with the amount of time young adults spend posting or scrolling.

Time spent on social media does not predict poor mental health, according to a new study from two Florida universities

Led by Chloe Berryman of the University of Central Florida (UCF), the researchers surveyed 467 young adults about social media and their personal and emotional lives.

The surveys asked how much time each day they spent on social media, how they used it, and what role it played in their lives.

The respondents also answered questions about their anxiety levels, ability to empathize, frequency of suicidal thoughts and family and social support networks.

The results indicated no significant or consistent associations between time on social media and self-reported signs of psychological distress, with the notable exception of vaguebooking.

The practice was more common among people that reported that they were lonely and who were more likely to have suicidal thoughts.

But the authors cautioned against broader assumptions about the negative influences of social media on mental health.

Although they may not describe feeling depressed, warning signs include saying they are stressed or easily annoyed. Other symptoms include tearfulness, withdrawing from socializing, changes in eating habits and a lack of energy. Physical signs are headaches, poor digestion, and muscle and joint pain. Stress and depression often appear together.

Like depression, stress can also cause fatigue, headache and aching muscles, as well as ulcers.