The absorption and retention of 47Ca and 85Sr was compared
for four human volunteers on a normal diet with and without sodium
alginate supplement. Fifteen to twenty grams alginate/day was given
for seven days. Alginate decreased the retention of 85Sr and
47Ca by about 70 and 7%, respectively. No changes in excretion
pattern of Na, K, Mg or P were observed (Carr et al., 1968).