Eggshell fractions containing different particle sized affect mineral absorption but not bone mineral retention in growing rats

Fortified tuna bone powder supplementation increases bone mineral density of lactating rats and their offspring

BACKGROUND

Breastfeeding leads to bone calcium loss for milk production, resulting in progressive maternal osteopenia. Calcium supplement from natural sources has been postulated to be more beneficial to bone health than purified CaCO₃ because natural sources also contain other nutrients such as certain amino acids that might enhance calcium metabolism. Herein, we examined the effect of calcium supplementation from tuna bone powder and CaCO₃ on bones of dams and the offspring.

RESULTS

Both forms of calcium supplement, i.e. tuna bone powder and CaCO₃ , increased maternal bone mineral density (BMD). However, bone histomorphometry revealed that only tuna bone had beneficial effect on maternal bone microstructure, i.e. increased bone formation, decreased bone resorption and increased in bone volume. Regarding the mechanical properties, the decreased ultimate load in non-supplement lactating mothers was restored to the load seen in nulliparous animals by calcium supplementation. Moreover, both tuna bone and CaCO₃ supplementation in mothers led to increased milk calcium concentration and consequently increased BMD in the growing offspring.

CONCLUSION

Calcium supplement from tuna bone powder was effective in preventing maternal osteopenia. Tuna bone, which is a readily available fishing industrial waste, is a good alternative source of calcium supplement that increases BMD in both lactating mothers and the neonates. © 2017 Society of Chemical Industry.