"Caffeine intake has been associated with a reduced risk of Parkinson's and Alzheimer's diseases," said lead author Ellen Mowry of the Johns Hopkins University School of Medicine in Baltimore, Maryland. "Our study shows that coffee intake may also protect against MS, supporting the idea that the drug may have protective effects for the brain," she added.
The Swedish study found that "compared to people who drank at least six cups of coffee per day during the year before symptoms appeared, those who did not drink coffee had about a one and a half times increased risk of developing MS."
The US study found that "people who didn't drink coffee were also about one and a half times more likely to develop the disease than those who drank four or more cups of coffee per day in the year before symptoms started to develop."
More research is needed to determine if caffeine in coffee has any impact on relapse or long-term disability due to MS.
Quote from a very respected Epidemiologist – Fits in with data in other neurodegenerative disorders (Parkinsonism) but as with other observational studies it needs replication in other countries. Cohorts before concluding it is valid.