You have to ask for your D results.... "normal" doesn't cut it anymore. Some lab ranges for D go down to 30... which is not normal anymore. Goal is 50 or above.

Gluten is a prime candidate to start with. I think the most common intolerance. We've had people on PN who turned out gluten intolerant and by eliminating it were better.

Nightshades are a problem for me... potatoes esp and also too many tomatoes. (I only have a very tiny amount of bland tomato sauce now and then). Potatoes make my feet burn terribly. Peppers also make me burn.

I've given up sugar and fructose. I can tolerate an orange a day, but not much else, fruit wise. I have terrible GI problems from sugars.

I think anyone with PN should avoid MSG at all costs. This form of glutamate stimulates the NMDA receptor for pain. Read your labels always. Watch for it in restaurants. Chinese, esp but also others that have sauces, and soups where it is commonly added.

Other offenders are dairy protein (casein), chocolate, soy, corn.

Eliminate one at a time and reintroduce...each person is different!