I use for three days only once a month, daily use of kefir and other probiotics in between. I think every two weeks is not good for your gut bacteria to recover. My recollection is once a month was recommended by Zelenko.
Reintroducing beneficial gut bacteria is essential!
My cycle is based on...ircc...Dr tenpenny claims about parasite life cycles. I started three days on, seven off and have lengthened the off time to two weeks. The interview source is on my other device and can share it later, if you wish.
Best wishes