Storing Vitamins Long Term

In "How to Store Vitamins Long Term (without Losing Potency)" by Diane Vuković at Primal Survivor, the author observes: 

    Foods like white rice, flour and pasta are great foods to stockpile for emergency preparedness because they have long shelf lives and are easy to store.

    The downside is that they (as well as lots of other emergency foods and meals) are lacking when it comes to nutrients.  To make up for this, you might want to store vitamins as part of your emergency planning. 

  

Her basic advice is:

1.  Choose vitamins in tablet form, come in dark-colored glass jars with screw lids and have a best-by or expiration date listed on them.
2. Store the vitamins in their original containers in a cool, dark place.
3. As an extra layer of protection, keep the vitamin jars in an airtight container or sealed Mylar bag.

Stored this way, vitamins should retain their potency for at least 2 years past their best-by date and could remain potent for 15+ years.

The rest of the article discusses shelf-life, identifying vitamin pills that have gone bad, and the different environmental factors that tend to degrade the different vitamins or vitamin groups.