As for calcium, I had a teacher in college. She is the kind of person who pays great attention to medical care. In order to find a suitable calcium supplement product, she bought all the calcium on the market and mailed it to a particle research institute in Wuhan for inspection (crazy? ), as a result, the deposition of calcium is only more than 40%, and other foreign brands are not very good. Only two kinds of calcium deposit more than 70%
One is that the content of super calcium is above 70%, and I forget the details.
One is seashell liv, calcium powder, more than 90%.
Both are made in China, hehe.