I know people with severe GI and food allergy issues who live on restricted diets. Believe it or not there may be foods even your doctor might not be aware of that are healthy and safe alternatives. There's also the issue mentioned above of how you prepare certain foods, dehydrating for example. I'd recommend researching raw food diets.


Here's some alternate foods/ingredients off the top of my head:

Carob (instead of chocolate)
Goat milk/cheese/yogurt
Rice cheese
Teeccino (instead of coffee)
Young Coconut juice (coconut water)
Agave nectar (an alternative to sugar and honey)
Dried Seaweed
Seeds (sesame, etc)
PeaButter (no nut alternative to peanut butter)


There's tons more stuff but thats all that comes to mind. Good luck.