The Magnesium-Calcium Ratio Hypothesis
According to some, milk causes osteoporosis because it is high in calcium and low in magnesium.
Mother’s milk however, has the same magnesium-calcium ratio (1:10) as cow’s milk:
Cow’s milk Human milk
Calcium, average 120 32
Calcium, variation 107 – 133 25 – 41
Magnesium, av. 12 3
Magnesium, var. 9 – 16 3 – 5
And mother’s milk appears to perfectly enable the infant to grow strong bones, like cow’s milk does in calves.
Mother’s milk certainly does not enhance osteoporosis in suckling. On the contrary; mother’s milk enables infants to grow stronger bones very rapidly.
A study even showed an association between a high magnesium intake and hip fracture risk. (1)
Some say that magnesium and calcium are two competing minerals which naturally occur in a 1 : 2 balance. The more calcium is consumed the more magnesium is required. (to deport calcium from cells).
This of course is utter nonsense, there is no natural magnesium-calcium balance; this ratio is different per food.
And again, mother’s milk contains the least magnesium relative to calcium, and no sane person can claim that mother’s milk causes osteoporosis. (or that pork is preventive, and vegetables and oranges enhance osteoporosis)
The amount of magnesium relative to the amount of calcium in different foods:
Only 50% is natural?
21% chicken egg
10% Cows milk (min. 3.5% fat)
10% Human milk
An abstract of this source can be found at the National Library of Medicine
(1)Michaelsson K, et al, Diet and hip fracture risk: a case-control study. Study Group of the Multiple Risk Survey on Swedish Women for Eating Assessment. Int J Epidemiol 1995 / 24 (4) / 771-782.
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