KATHMANDU — Eating a diet rich in fruits and fish can help prevent the risk of developing colorectal cancer by up to 86 percent, a new study has suggested.
Colorectal cancer develops from intestinal polyps and has been associated to low-fibre diet including large quantities on red meat, alcohol and high-calorie foods.
For the study, presented at the ESMO 19th World Congress on Gastrointestinal Cancer, the team included 808 people who were undergoing screening or diagnostic colonoscopies who were between 40 and 70 years old and had adhered to a Mediterranean diet.
Naomi Fliss Isakov from Tel-Aviv Medical Centre, in Israel said, “We found that each one of these three choices was associated with a little more than 30 per cent reduced odds of a person having an advanced, pre-cancerous colorectal lesion, compared to people who did not eat any of the Mediterranean diet components.”
The study also showed that consumption of even two to three components of the diet, compared to none, was associated with half the odds of advanced polyps.
A typical Mediterranean diet was defined as consumption levels above the group median for fruits, vegetables and legumes, nuts and seeds, whole grains, fish and poultry and a high ratio of monounsaturated to saturated fatty acids, as well as consumption below the median of red meat, alcohol, and soft drinks.
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Drinking 3 cups of coffee or tea daily may keep stroke risk at bay
KATHMANDU — There have been several conflicting studies on the health benefits of drinking coffee and tea and their various varieties. But drinking up to three cups of coffee or tea in a day is safe because it reduces irregular heartbeat and stroke risk, according to a new study published in the journal JACC: Clinical Electrophysiology.
Coffee has previously been believed to worsen abnormal heart rhythms, as doctors generally discourage patients suffering from the condition. However, the results of this particular study say that a daily consumption of upto 300 mg of caffeine may be safe for arrhythmic patients.
This is because the caffeine acts as a stimulant to the central nervous system and blocks the effect of adenosine. Adenosine is a chemical which causes Atrial Fibrillation (AFib).
A single cup of coffee contains about 95 mg of caffeine. It acts as a stimulant to the central nervous system and works to block the effects of adenosine — a chemical that causes AFib.
AFib is the most common heart rhythm disorder, causes the heart to beat rapidly and skip beats, and if left untreated, can cause strokes.
“There is a public perception, often based on anecdotal experience, that caffeine is a common acute trigger for heart rhythm problems,” said lead author Peter Kistler, Director at Melbourne’s Alfred Hospital.
But, “caffeinated beverages such as coffee and tea have long-term anti-arrhythmic properties mediated by antioxidant effects and antagonism of adenosine,” he added.
A meta-analysis of 228,465 participants showed that AFib frequency decreasing by 6 per cent in regular coffee drinkers, and an analysis of 115,993 patients showed a 13 per cent reduced risk.
Another study of 103 post-heart attack patients who received an average of 353 mg of caffeine a day showed improvement in heart rate and no significant arrhythmias — or abnormal heart rhythms, that cause the heart to beat too fast, slow or unevenly.
However, in two studies, where patients drank at least 10 cups and nine cups of coffee per day, showed an increased risk for ventricular arrhythmias (VAs) – a condition in which the lower chambers of the heart (ventricles) beat very quickly.
On the other hand, patients with pre-existing heart conditions who consumed two or more energy drinks — that contains concentrated caffeine — per day reported palpitations within 24 hours.
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