百度查到的是錯的？鏈接在裏麵。牡蠣殼也是碳酸鈣吧。

https://baike.baidu.com/item/%E7%8F%8A%E7%91%9A%E9%92%99

Coral Calcium: Benefits, Side Effects, and Safety

https://www.healthline.com/nutrition/coral-calcium#alternatives