Solubility of calcium salts and carrageenan used in infant formulas did not influence calcium absorption in rats.
Calcium absorption from tricalcium phosphate (TCP) was compared to that from calcium chloride, CaCl2, in the presence and absence of carrageenan in the rat model. There was no difference in percent calcium absorption as indicated by femur uptake of TCP or CaCl2 intrinsically labeled with 45Ca given by gavage (78.4 +/- 9.6 vs. 80.0 +/- 5.9, respectively). Thus, the difference in solubility of the two salts did not influence calcium absorption. When TCP was delivered by gavage in a solution containing 1% carrageenan, calcium absorption was not decreased compared to that of a control without carrageenan. In this model, calcium from TCP in the presence of up to 1% carrageenan is well absorbed.
Koo
J
J
Department of Home Economics, Korea Air and Correspondence University, Seoul.
Weaver
C M
CM
Neylan
M J
MJ
D000818:Animals; D001682:Biological Availability; D002122:Calcium Chloride / Q000737:chemistry / Q000378:metabolism*; D002130:Calcium Phosphates / Q000737:chemistry / Q000378:metabolism*; D002132:Calcium Radioisotopes; D002351:Carrageenan / Q000378:metabolism / Q000494:pharmacology*; D005269:Femur / Q000378:metabolism; D006801:Humans; D007223:Infant; D007225:Infant Food; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012995:Solubility
D002130:Calcium Phosphates; D002132:Calcium Radioisotopes; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C485838:calcium phosphate, monobasic, anhydrous; D002351:Carrageenan; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous; D002122:Calcium Chloride