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April 30, 1938

ADMINISTRATION OF CALCIUM SALTS

Author Affiliations

Washington, D. C.

Professor of Biochemistry, George Washington University School of Medicine.

JAMA. 1938;110(18):1507. doi:10.1001/jama.1938.02790180095024

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Abstract

To the Editor:—  In Queries and Minor Notes (The Journal, March 19) a correspondent, inquiring about the use of calcium salts in asthma, is told to use "tricalcium phosphate 4 Gm. in milk three times daily, calcium lactate 2 Gm. four times daily or calcium gluconate 4 Gm. four times daily." The recommendation of the use of tricalcium phosphate in milk as a method of administration of calcium is so much at variance with what is known about calcium absorption that it seems desirable to call attention to the following experimental data and basic facts:In 1927 Roe and Kahn (Absorption of Calcium from the Intestinal Tract of Human Subjects, The Journal, March 26, 1927, p. 980) observed a 91 per cent rise in the blood calcium of a normal human subject given 5 Gm. of calcium lactate in water by mouth and only a 28 per cent elevation of

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