Jamieson is one of Canada's most trusted and popular healthcare companies. The sheer number of vitamin and supplement companies and brands on the market is often overwhelming. Jamieson Vitamins have sought to set themselves apart in quality by making a 360 Pure Promise to consumers and becoming TRU-ID certified to back up their quality claims. TRU-ID is an independent DNA certification program. Just like the DNA in our bodies, plants also have DNA.