We used the yogurt maker Yogourmet and follow the directions for SCD as given to us by Lucy's Kitchen Shop. It was so easy. We used ours so much that we broke it, but plan to buy another ASAP.
Lactose free milk didn't work but yes, it must be the lactose in general. She can only tolerate GOOD quality cheddars and a few other types.
I wonder why lactose free milk was intolerable? Anyone have insights there? Could it be a protein thing?