I, for one, am very glad that you revived this old discussion letifer as I think it is a critical subject for all of us experimenting or living on varying forms of paleodiet.
I also think that Lex's recent post submitting the results of his Bone Mineral Density scan, as mentioned by gs, makes for compelling evidence that the Ca/Mg demands of accepted nutritional thought - and feared by many of us - are perhaps unsubstantiated after all. Perhaps, as has been suggested, those demands are closely linked with consumption of inappropriate foods such as dairy and anti-nutrient containing fruit/veg?
Like you Barbarian, I use celtic sea salt liberally with my raw meats and have done so throughout the many years of eating this way. I've done this with the belief that it provides vital trace minerals, improves digestion by helping in the formation of hydrochloric acid and helps with my salt loss (caused by adrenal problems). I certainly seem to feel better when using it.
I have noted, however, that Lex does NOT use salt and I wonder about the implications of this with regard to his mineral levels. His results and progress hint that perhaps we should NOT be using salt irrespective of the claims of how good it is for us?
For the record, I also use small supplemental amounts of Blue Ice raw fermented cod liver oil for my Vit D levels along with my raw diet of grass-fed meat, fat, liver/heart, and miniscule amounts of veg for flavouring. Over the last few years I do seem to have developed badly receding gums which, I believe, suggests decreasing bone density in my case. Is this related to the salt intake or insufficient Ca/Mg? I, too, have sometimes looked towards ground egg shell for Ca by combining it with lemon juice to form highly absorbable calcium citrate. I haven't taken this for a long while now but am contemplating trying it again.
It's all very confusing and is very much a subject I would like to have a full grasp of the facts on!