I've recently discovered (today) that green/red leaf lettuces make me sick. i threw up lettuce i had eaten yesterday afternoon. so my question is why would one be unable to digest a certain type of lettuce? (i dont usually eat red or green leaf lettuce) also does anyone know where i could find some sort of list of what they spray on produce in the grocery store? is it just water or do they add something to it? thanks in advance!!!