Hi Katie -
Sorry for the delay in my response.

It's good to remember that spelt is a species of wheat and contains gluten. There are two kinds avail in my area anyway, white refined spelt tortillas (which will break down into sugar very quickly) and whole grain spelt tortillas, which would be a better choice. The rice tortillas would be gluten free.

If you were going to do a juice fast, would be best to make it 80-100% veggie juice and just a small amount of fruit juice for flavoring really.

There is a big debate about carrot juice and its sugar content. So that's another one that you may want to limit.

If you are doing the MC, you are only doing a small amount of the maple syrup, so it can not be compared to drinking large amounts of fruit juice.

If you do fruit juice at all it's best to dilute it by half to lower its glycemic index.

Hope that helps!

Kelly