The best approach is probably to buy supplements from a pharmacy, health food store, qualified health care professional such as medical or naturopathic doctor, or from a large retail chain such as Whole Foods Market, which has very rigid standards for evaluating all supplements that its stores carry.

CNN: How can I pick the healthiest brand of red yeast rice?

"The profession was switching the way it trained pharmacists, and as a result there was a year when we had no pharmacy class, " says Jim Owen, director of professional practice for the American Pharmaceutical Association.

FORBES: Careers

As a pharmacy professor for the first half of my career, I have always felt that licensed healthcare professional have partaken of a public trust to provide medical and pharmaceutical care to all, regardless of their personal views toward the individual.

FORBES: What Pharmacist 'Conscientious Objectors' Might Learn From Boston Bombing Suspect's Nurses