Interesting find, but I think the researchers are on the wrong track by focusing on caffeine. Should we drink red bulls and Mountain Dew for MS? I have a theory about MS I've never heard anybody else mention. I think it has to do with a sluggish bowel and the gut bacteria changes/fermentation that it causes. That's why you see curious things like teachers getting high rates of MS, but especially among those who teach elementary grades. Weird, right. But not too weird if you think about the fact that teachers, especially at that age group, can't just up and take a bathroom break.
You also see a high rate among nurses. Why? Well, it could be exposure, stress, etc. But what about the 12 hour shifts and the fact that they too can't just take a break whenever nature calls. For men, the highest rate has been among construction workers. Why? Well, if you are a builder or plumber, you may frequently work at job sites with less than ideal plumbing situations. Why the link between MS and dairy? Again, it slows the bowel. Why did Dr. Swank find a low saturated fat (and for some a no meat) diet helps? Because a starch based diet speeds up digestion. But what about Dr. Wahls. Doesn't she say you get better with lots of meat and saturated fat? Well, I think she may have a different condition. And some people get worse on her protocol. But that aside, people often ignore the enormous amount of veg she eats. Three cups of sulfur! You eat a heaping plate of that everyday, and it will change your gut. Plus, she does not eat lunch. An interesting factoid people don't mention. So somehow she has changed her digestion.
And now we have coffee. It helps, but only if you drink a lot of it. Why? I submit because it can have a laxative effect.
We could also talk about Tecfidera, which I think works somehow by altering digestion. Yet the mainstream is convinced the mechanism of action has to be immune suppression.