I recently completed a 10 day juice fast (mainly kale, spinach, celery, cucumber, apples, and lemons). The day after ending my fast, I started my cycle a week early (heavier flow and more cramping than usual). My first guess is that starting my cycle early is due to the severe cut in calories over the 10 day span and not related to juicing.
Ladies, if you juice, have you noticed any difference in your cycles?