yeah, i think it definitely calms the nerves and helps alkalinise the blood. i've had problems with cramping for quite a few years now, and now after 2, must be nearly 3 weeks caffeine free and now a week of regular cacao i am starting to not get those cramps all the time.
i think the uric acid from the caffeine definitely reduces magnesium absorption, and that also leads to bone thinning and nervous problems as well.