My father is the kind of person who pays more attention to health. Although he is only in his fifties, he has been taking preventive calcium supplements for the past two years. Now he is taking Wen Lan calcium tablets, which won't fall off every day. I checked, and many top three hospitals recommend it. Moreover, as can be seen from my dad's state, he has been taking calcium tablets for two or three years, so his physique is better than that of many peers, his back is tall and straight, and he is not old at all.