与天然与否无关。天然的东西其好处是有其它微量元素等成分。但对于钙(或铁或任何元素)来说天然与否没有差别。
与天然与否无关。天然的东西其好处是有其它微量元素等成分。但对于钙(或铁或任何元素)来说天然与否没有差别。
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