Okay, in trying to figure out my high stimulated state on low carb, I came across the following:
"In a 5-day metabolic study of five normal medical students given a liquid diet, such as that given to preoperative peptic ulcer patients (that delivered 138 g of fat, predominantly from whole milk and cream, and that provided only about 200 mg of magnesium daily), there was an average daily loss of 16 mg of magnesium (Macbeth and Mabbott, 1964). This amount of dietary fat is equivalent to that of the typical American diet, comprising about 40% of the daily calories (de los Rios, 1961). This liquid diet differed from that given to the young men on the linoleic acid diet (Hathaway, 1962) in that the ratio of calcium to magnesium was 9:1, rather than 2:1.
Metabolic balance studies in rats on low- and high-fat diets have also shown that increasing the fat intake decreases the amount of magnesium absorbed from the gut (Olson and Parker, 1964; Tadayyon and Lutwak, 1969)."
More details and studies on the same here: http://www.mgwater.com/Seelig/Magnesium-Deficiency-in-the-Pathogenesis-of-Disease/chapter5.shtml
It would seem river water hardness (calcium and magnesium ions combined) varies from about 50mg/L to about 500mg/L. Treated drinking water on the other hand varies from 20mg/L to about 50mg/L. Bottled water has even less.
To compound things, ontop of this wheat can have a decent amount of magnesium.
So we can guess where the inuit and massai may have been getting there magnesium from - from natural water ways. Not so easy for us high fat, low carbers, unless your one of the smaller group shown in the studies provided that dont lose magnesium absorbtion on high fat diets.
Of course theres the often cited electrolyte problem, with sodium and potassium. Certainly both the inuit and massai would have gotten some significant amount from their practice of consuming blood. Perhaps though, not such a big deal for us, we can just eat some salt, fruit, nuts and dark leafy greens. If you got your mineral foods it seems like youd be fine. At least in everything but magnesium, it would seem.
So the question is....is there any harms, or other benefits, on a low carb paleo diet, having some low-fat rest days ?
(also low carb, something like vegan, salad greens, vege soups and lean pescatarian food with some serious dark leafies and also a few berries- also oil free as magnesium is also inhibited by unsaturates as well, possibly more)
And are there any other vitamins and minerals absorbed more poorly on a high fat diet?
Do you think a rest day or two would also clear the digestive tract, enough of fat, that digestion for other things would improve in that timespan?
Of course for magnesium I could supplement (and probably will somehow), or even perhaps take an epsom salts bath, but I wonder, could I also miss out on something else by consuming basically fat with every meal...