On what evidence is it based?
From my reading, the metabolism of calcium is governed by Vitamin D, Vitamin A, Vitamin K2, magnesium, zinc and selenium. Get those right and calcium can't build up in your arteries, you wont get osteoporosis and you'll maintain strong teeth.
Iron buildup on the other hand does have definite genetic influences. My mother was homozygous for one of the haemochromatosis mutations. Wasn't discovered until her liver was destroyed. That makes me heterozygous, so with a disposition to building up iron. After I discovered this, I resumed regular blood donations. Unfortunately, I had a heart attack a few years later and this disqualified me from further donations. Curiously though, monitoring of serum ferritin and transferrin saturation since then have shown stable iron levels. Red meat intake has increased in that period
Just an N=1 that is partly consistent with what you've said above and partly inconsistent. I'm sticking to the primal lifestyle, including the dietary part, for now on the basis of what I've read and my own experience
Four years Primal with influences from Jaminet & Shanahan and a focus on being anti-inflammatory. Using Primal to treat CVD and prevent stents from blocking free of drugs.
Eat creatures nose-to-tail (animal, fowl, fish, crustacea, molluscs), a large variety of vegetables (raw, cooked and fermented, including safe starches), dairy (cheese & yoghurt), occasional fruit, cocoa, turmeric & red wine