Incidence of Hypothyroidism in the Elderly

Abstract

BEDICAL OU number of previous workers mentioned above. Two cuestions immediately arise-Where has the retained magnesium collected ? And how has this retention been trought about? Magnesium does not accumulate in the extracellular fluid, for there is no rise in the serum magnesium. On the contrary, serum magnesium tends to fall, indicating a movement of magnesium out of the extracellular space. It could move into the cells or, alternatively, be deposited in the bones. Tibbetts and Aub (1937) found that the ratio of magnesium retention to calcium retention was greater than the ratio of magnesium to calcium in bone and concluded that some of the retained magnesium had been taken up by the soft tissues. This is a valid inference only if bone were of constant composition, which it is not.