This is a question I receive frequently. Especially from those with only a couple of animals or those using a product with small pets.
If it's a high quality product like the ones we make available to you they can be kept nearly indefinately. The 'best by' date will generally be two years from manufacture, but I've had a customer use even a seven year old product stored incorrectly at higher doses with excellent support. I don't recommend that however!
Your best approach when you get a new herb mix is to take out the amount of product you will use for a month or two. Just pour it out- don't contaminate the contents within the bag and do not get it moist in the bag. Then reseal and enclose in a freezer bag. Writing the date on it with a permanent marker is another good step. Then put it in your freezer. Ta da! It will keep pretty much forever.
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Katherine MH, CR, CA, CEIT, DipHIr, QTP has extensive alternative training in Vitalistic (cause oriented) wellness,including a Master's Degree in Herbology and is a lifelong pet, poultry, horse and livestock owner. She has a heart to share with you so that you, your family and your creatures may achieve abundant wellness. Be Blessed!
These statements have not been reviewed by the Food and Drug Administration and are not intended to treat, cure, prevent or diagnose any disease.