I have never heard of Dr. Bronner but know the MM stuff obviously works very well for me.
My system loves to form stones - kidney stones, liver/gb stones, etc. I guess then I am lucky that at least my skin is one organ working overtime on detoxing!
No kidney stones in over five years (previously four stones in 3.5 years). So I take that as great progress on my part to correct this problem. Now on to those pesky liver/gb stones!