The main ingredient, senna extract, affects bowel motility, that is, its natural contractions. That is why such herbal complexes are traditionally taken in the evening: the effect has time to appear by morning without disrupting the daytime routine.
The tablet form makes it easy to take: there is nothing to brew, measure or prepare — the dose is already determined by the format. This is convenient when you want to fit the supplement into your evening routine without extra effort.
As for duration: senna-based products are not intended for constant, uninterrupted use. The label does not state the length of the course, so it is best to agree the duration with a specialist. Slabifit is suited to occasional periods — when travelling, or during a temporary change of diet or eating pattern, when digestion responds more slowly than usual.
If the discomfort keeps coming back, that is a reason to see a specialist rather than extend the course on your own. A consultation is also recommended if you have chronic conditions, are pregnant, have a sensitive bowel or take medication.