Some people choose to rotate their probiotics every so often to introduce their gut to new bacteria. Doing this is excellent if you do not suffer from digestive issues.
However, our philosophy is that if their gut is impaired, healing it is best achieved by using a product like Smidge Sensitive Probiotic.
We feel that someone might be ready to "graduate" and add new strains only AFTER their gut is healed enough. We've had people that have rotated in another product too early in their healing and ended up with adverse reactions.
For the people that have achieved healing with Smidge Sensitive Probiotic and want to add new strains, we have Smidge Probiotic.
Smidge Probiotic sticks to our approach of how we balance the strains (not too much d-lactic acid, balanced approach to histamines, etc)and offers a diverse blend of 13 strains.
On the last note, Smidge Sensitive Probiotic can be taken indefinitely. Some other products have a large amount of a single strain, and you would want to rotate those products (or avoid those products).