In the studies, calcium was an LSPI producer, particularly at levels above 1500 (the curve goes way vertical). In conjunction with calcium, when sodium was added, the LSPI occurrences went way up. Magnesium is LSPI neutral. That is why, in most of the D1G2 oils, it looks as if they replaced around half the calcium with magnesium, and there is no sodium. Unless they remove calcium completely from the add pack, it is hard to envision there being any sodium in a D1G2 oil. They would be fighting the So/Ca with something else. Why bother?