Age, in years The content [Keys et al., 1950] Age Contents [Fredrickson et al., 1967]
Mg% Mmol / l Mg% Mmol / l
20 101-189 2.6-4.9 0-19 120-230 3.1-5.9
thirty 108-218 2.8-5.7 21-29 120-240 3.1-6.2
40 128-237 3.3-6.2 30-39 140-270 3.6-7.02
50 145-270 3.8-7.02 40-49 150-310 3.9-8.06
60 165-258 4.3-6.7 50-59 160-330 4,2-8,9
70 129-246 3.4-6.4