Key points from article :
Researchers rule out potential detrimental effects of coffee on arteries.
Previous studies said that coffee stiffen arteries therefore to reduce its consumption.
Compared coffee drinkers of less than a cup a day to those who drank up to 25 cups a day.
MRI heart scans and infrared pulse wave tests showed no difference in stiffening of arteries.
Took factors such as age, weight and smoking status also into account.
Plans to study people more closely so that they can help to advise safe limits.
8412 participants who drank up to 25 cups of coffee per day took part in this study.
Research by Queen Mary University of London, presented at British Cardiovascular Society Conference.
