Six cups a day linked to 31% lower risk of MS
In both studies, participants provided information about their coffee drinking.
The Swedish participants quantified their usual daily intake in cups at different ages, from 15-19 years until they were 40 years and over.
In the US study, participants gave information about their maximum daily consumption. Those who drank one or more cups also recalled at what age they started drinking coffee regularly.
Fast facts about MS
Around 400,000 people live with MS in the US
There are approximately 10,000 new diagnoses each year
MS mostly affects white people, and women are more prone than men.
The researchers then estimated coffee consumption at and before the onset of symptoms in those with MS, and they compared the results with those of the healthy groups.
There was a consistently higher risk of MS among those who drank fewer cups of coffee every day in both studies, even after adjusting for factors such as smoking and weight during adolescence.
In the Swedish study, coffee consumption correlated with a lower risk of MS both at the onset of symptoms and 5-10 years beforehand. Those