There is no definitive point where one is able to predict when a specific diet will spoil or become deficient in one or more nutrients. The common guideline of a six month shelf life is based on longstanding practice in North America. In Europe and Asia, differences in local practices and regulatory oversight have led to Teklad standard natural ingredient diets being routinely used out to nine months and sometimes 12 months post-manufacture. This practical experience, along with literature support and vitamin testing over time, gives us confidence that these diets continue to support animal health and study integrity out to at least nine months post-manufacture. Please refer to your institution for guidance if you are unsure of local policies.

Recommended storage conditions:

• Cool and dry; at or below 70 degrees fahrenheit, humidity below 50% ideal, but up to 65% is acceptable
• Clean and free of pests
• In original packaging or in a container that prevents continuous exposure to light and minimal exposure to air

A small number of representative custom research diet formulas are found on our website. If you are unable to find a product code or formula description cited in a publication, or one used previously by your lab or others, contact us.