herbs that cause painful reaction

so far all of these cause the same type of intestine pain...

aloe, raw turmeric in higher doses, raw fenugreek powder, vinegar, raw black pepper, raw neem powder

i'm suspecting that all of these have anti-protozoal action.
cooking the herbs makes them tolerable, but i don't think they are doing much killing in that state.

so i'm starting on very low dose raw turmeric (1/4 tsp) at the advice of an herbalist. so far so good, no pain. i'll just keep at it very slowly to see if i can make some headway.

the regular parasite herbs like garlic, Black-Walnut etc, never caused any pain.