Haha…Because eggshells are almost entirely calcium carbonate

来源: Leo5568 于 2023-08-04 14:14:27 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读： 次 (1407 bytes)
回答: 鸡蛋壳。。 由 borisg 于 2023-08-03 18:03:56

half of one eggshell provides 1,000 mg of calcium – enough to meet the daily requirements for adults.

In addition to calcium and protein, eggshells also contain small amounts of other minerals, including strontium, fluoride, magnesium and selenium.

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