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For a global company like Amway, which sends products into climates ranging from the heat and humidity of Malaysia to the extreme cold of a Moscow winter, the process of setting product expiration dates is complex, to say the least.“Putting together a single product for the world is a very difficult proposition,” says Mark Proefke, manager of analytical sciences at Amway.Inside, rows and rows of products are exposed to temperatures ranging from sub-freezing to 50 degrees Centigrade (122 degrees Fahrenheit).

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Separating all of the active and inactive ingredients in a product to monitor each individually is no small task. For supplements that contain botanical ingredients, Amway performs a process known as phytochemical fingerprinting to separate ingredients (click here for a video created inside the Amway analytical sciences lab).Stability of the product based on the ingredients that go into it is key to helping scientists determine both the expiration date for the unopened product, and the length of time a product will last once it’s open.In Amway labs, this is known as the “Period After Open,” or “PAO” date. Echinacea, for example, is very different because it contains a complex plant extract.” Amway™ scientists must also consider different regulations by country in each of its markets for setting expiration dates.Mark Gammage, manager of chemistry stability investigations, agrees.“As far as storage of products go, try to avoid extremes in heat, humidity and direct sunlight to ensure the highest quality and effectiveness throughout the product’s life.” And for best results, dispose of any product that is past its expiration date.Inside the Amway analytical sciences and packaging labs, the volume of testing and research involved in this process is stunning.