Black Forest Tea is a refreshing, aromatic and clean tasting tea for the occasional relief of constipation :- Black forest is wonderful product for cleansing your blood stream if there are spots(pimples) and lumps on your body/ face also if you are constipated. It takes about 10 to 12 hours to work. Best to take overnight . Take 1&half hours after meals at night preferably. Black Forest Herbal Tea normally produces bowel movements within 6 to 12 hours. Black Forest Herbal Tea is indicated for the relief of occasional constipation and contains Senna leaves, which promote bowel movement by one or more direct actions on the intestines.