Stick to the major brands and you should be alright!
Following my republication of the article in The Conversation two days ago, I have now come to a conclusion. That is that if one sticks to major brands or supplements made in the USA then one should be perfectly safe.
Margaret of Tasmania made a recommendation to use ConsumerLab.com and it appears a brilliant suggestion.
“How to Choose Supplements Wisely” on ConsumerReports.org (October 30, 2019) warns consumers that the FDA does not test supplements for quality or safety before they are sold and highlights the importance of choosing supplements that have been tested and approved through ConsumerLab’s Quality Certification Program or other independent testing program.
That is just one review of the ConsumerLab site.