The healthiest serving of meat would be the size of your palm of your hand, according to the health books
Magnesium.
In healthy kids, the amount of urinary* excretion of calcium is about 2.38 +/- 0.66(SD; no =52, mg/kg in about 24 hour.
Over consumption of magnesium can cause the number spike in significant number.
The first one is correct, because your skin is always the first thing anything comes incontact with.