I think the man had a lot of success with his RA, by changing his diet.
Avoid sugar , grains, dairy and processed junk. If a food hurts you do not eat it! (Mercola , how to put RA into remission)
Greens- eat your veggies , hardly anyone flares from eating greens.
Keep fructose under 20-30 grams a day.
Try to eat 9 cups of veggies a day (Wahl protocol) (non starchy)
Diet change has improved my RA. I feel best eating raw veggies and some fruits and avoiding grains, sugars, nightshades, beans and dairy. Sed rate dropped from 65 to 19, but it took over a year. www.fatsickandnearlydead.com