鈣 Calcium

Adequate calcium and vitamin D throughout life, as part of a well-balanced diet, may reduce the risk of osteoporosis.

Adults aged 19 to 64 need 700mg of calcium a day. ... Taking high doses of calcium (more than 1,500mg a day) could lead to stomach pain and diarrhoea. ... You should be able to get all the calcium you need by eating a varied and balanced diet.

19 歲以上成人鈣質之每日建議攝取量為 1000 毫克；鈣之上限攝取量（UL）為每日 2500 毫克。

In populations with low dietary calcium intake, daily calcium supplementation (1.5 g-2.0 g oral elemental calcium) is recommended for pregnant women to reduce the risk of pre-eclampsia.

市售鈣片主要分為碳酸鈣、檸檬酸鈣、海藻鈣三大類，碳酸鈣吸收率約27%、檸檬酸鈣約35%，海藻鈣本身即為紅藻來源的碳酸鈣。

成人（19歲以上）每日鈣的建議攝取量為1000毫克，每日上限攝取量為2500毫克。

吃鈣補D對預防骨折沒幫助