What should you look for when buying your nutritional supplements?  As you dig into this question more, you will realize they are NOT all created equal.  Consider this...
Third party certification.
Metagenics (the company we primarily carry) has been certified by three different third parties.  This means they paid a third party to come in and examine all of their raw materials and manufacturing to be sure they meet the guidelines.  Metagenics did this 3 times and passed each time. Achieving this status of certification is almost unheard of and very few, if any, other nutraceutical companies have achieved this status.

Most vitamin/supplement companies are NOT third party certified.  They claim to "ensure that all operations are in accordance with FDA guidelines for good manufacturing practices." This means they did not pay to have anyone come in and scrutinize their procedures to confirm they meet FDA guidelines, instead they are just telling us to take their word for it.  This difference is like telling the officer the speed you were going when he pulls you over versus him having an actual reading of your speed with his technology.
Metagenics is certified by all of the following third parties.  Be sure to look for these logos to ensure that the company that manufactures your products is certified.