Keywords Ca citrate;Ca lactate;Ca acetate;Oyster-shell;Eggshell;Absorption;Bioavailability;Isotope dilution technique;

• 柠檬酸钙;乳酸钙;醋酸钙;牡蛎壳;蛋壳;吸收率;生物利用度;同位素稀释技术;