Coffee and Health

One moment coffee’s a healthy option; an espresso later, it’s bad for you. Crema Magazine tries to help you separate the fact from the fiction…

Every day, 70 million skinny lattes, cappuccinos, double espressos and plain old black coffees are consumed in the UK. But for each of us who savours that freshly ground taste and feels confident that it’s providing us with antioxidants and improving

our concentration, there’s someone else growing increasingly paranoid that their daily cuppa joe might be leaving them dehydrated or addicted to caffeine.

Hardly a month goes by without a contradictory report on the health issues surrounding caffeine, so it’s no wonder the drink that many of us rely on is woefully misunderstood. This confusion was highlighted in a recent survey by the British Coffee Association.
It showed that 61% of participants didn’t realise that each cup of coffee counts towards daily fluid intake; three out of four people had no idea that scientific research has demonstrated that drinking moderate amounts of coffee may help protect against a range of diseases, including type 2 diabetes and Alzheimer’s; and a whopping 63% of us have tried to reduce the number of cups we drink each day because we’re worried that coffee might be bad for our health.

Hydration

It was long thought that caffeinated beverages were diuretics (which speed up the elimination of bodily fluids), but studies reviewed last year found that people who consumed drinks with up to 550mg of caffeine – or the equivalent of al least eight cups of instant coffee – produced no more urine than when drinking fluids free of caffeine. However, above 575mg, the drug was classed as a diuretic.

Heart disease

Patients with heart problems, especially high blood pressure, are often told to avoid caffeine, a known stimulant. But an analysis of ten studies of more than 400,000 people found no increase in heart disease among daily coffee drinkers, whether their coffee came with caffeine or not.

“Contrary to common belief,” concluded cardiologists at the University of California, there is “little evidence that coffee and/or caffeine in typical dosages increases the risk” of heart attack, sudden death or abnormal heart rhythms.

In fact, among 27,000 women in Iowa who participated in a study for 15 years, those who drank one to three cups a day reduced their risk of cardiovascular disease by 24%.

Hypertension

Caffeine induces a small, temporary rise in blood pressure. But in a study of 155,000 nurses, those who drank coffee for a decade were no more likely to develop hypertension than non-coffee drinkers. But a higher risk of hypertension was found from drinking colas.

Pregnancy
A study by the American Journal of Obstetrics & Gynaecology found more than 200mg of caffeine a day doubled the risk of miscarriage. But British Medical Journal research found no difference between women who drank moderate amounts of caffeinated and decaffeinated coffee. The Food Standards Agency advises an upper limit of 300mg during pregnancy – the equivalent of four cups of coffee a day.

Cancer
In an international review of 66 studies in 1997, scientists found that coffee-drinking had little, if any, effect on the risk of developing pancreatic or kidney cancer. In fact, another review suggested that compared with people who do not drink coffee, those who do halve the risk of developing liver cancer. And a study of 59,000 women in Sweden found no connection between coffee, tea or caffeine consumption and breast cancer. Some studies have found coffee drinkers have lower rates of colon and rectal cancers.

Liver disease
A 2006 study suggested coffee could reduce the risk of alcohol-related liver disease. The US research found a 22% reduced risk of developing alcoholic cirrhosis for each cup of coffee drunk per day. But tea was not associated with a reduced risk, suggesting an ingredient other than caffeine may be the active factor.

Weight loss
Although caffeine speeds up the metabolism, with 100mg burning an extra 75 to 100 calories a day, no long-term benefit to weight control has been demonstrated. In fact, in a 12-year study of more than 58,000 health professionals, those who increased their caffeine consumption gained more weight than those who didn’t.

Cellulite
Despite the widely held belief that coffee is a toxin which causes cellulite, there is no scientific research to back this up. In fact, one Brazilian study found that skin creams made with caffeine can help combat the appearance of cellulite.

HEALTH BENEFITS

Probably the most important effect of caffeine is its ability to enhance mood and performance. At consumption levels up to 200mg, consumers report an improved sense of well-being, energy and sociability.

Caffeine improves alertness and reaction time. And in the sleep-deprived, it improves memory and the ability to perform complex tasks. The Department for Transport advises drivers to ‘stop for a 15-minute break and drink two cups of coffee every two hours’ to alleviate fatigue. For the active, caffeine enhances endurance in aerobic activities, and performance in anaerobic ones, perhaps because it blunts the perception of pain and aids the ability to burn fat for fuel.

Recent findings add to coffee’s popularity. A review of 13 studies found that people who drank caffeinated coffee had a 30% lower risk of Parkinson’s disease. Another review found that people who drank four to six cups a day, with or without caffeine, had a 28% lower risk of type 2 diabetes.

How to kick the habit

Palpitations, irritability, insomnia, tremors in your hands and an inability to concentrate are symptoms of too much caffeine, but be prepared for more irritability, nausea, tiredness and headaches upon withdrawal.

Cut down slowly rather than going cold turkey. Drink plenty of (non-caffeinated) fluids to prevent headaches. Take painkillers to help with headaches. Massage, acupuncture, reflexology or any other stress-busting activities are also recommended.