@jay_bharat, You should be cautious when doing the fast and test your apples with Iodine for starch..... I found starchy apples can still cause pain + the sugar in the apples can still fuel the bacteria as a last resort.... You could try juicing spinach leaves + Add salt, for a day if your pain goes down, then go for 2 days and wright your pain levels down in a book + keep a food diary to see what causes you the most pain and what causes you the least pain... I know I am off topic but I am inspired at the power of diet....and the people here at KickAS....

One more thing, I found Extra virgin olive oil taken 1 tea spoon every 2-3 hours throughout the day helps during a flare... Thanks DragonSlayer for that insight... That gave me clues to how AS works according to leaky gut theory. Olive oil might coat the intestine walls where there is damage/inflammation + olive oil is an anti-microbial.

HLA B27+
Have AS since the age of 13.
Diagnosed in 2005 at the age of 22