I very strongly suggest you watch this 1/19/2016 PBS report.

I feel this is especially important to senior who probably take more supplements than "kids."

And it has professional Closed Caption.

I also would have triple concerns from a country that has little or no regulations on items of this kind, and in many ways, alleged "prescription" medicatioins.

And note how much is sourced from China.

See the PBS report here

I have long thought that supplements only supplemented the sellers.