"It's an absolute myth that red wine is good for you," says Professor Valerie Beral from the University of Oxford and lead author of the Million Women study. "The evidence is not there."
"Our research identified a group of chemicals called procyanadins which are polyphenols, and the key component in terms of protecting from heart disease."
Polyphenols, such as the antioxidant resveratrol, are found in the skins of red wine grapes.
"In high doses it does seem to enhance the lifespan of mice. But," he adds crucially, "you need huge doses."
In humans, it equates to thousands of litres of wine.
Professor Corder dismisses wines that effectively promote themselves as a health drink, with 'rich in polyphenols' or 'rich in antioxidants' on the label.
But, he says, two small glasses of a very tannic, procyanadin rich wine would confer a benefit.
"The problem is that most supermarket wines are low procyanadin and high alcohol," he said.
"We're promoting bad wine for bad habits."
