How long does the Vitamin C last in my pellets? Dan December 05, 2020 16:21 We guarantee the Vitamin C in your feed for 225 days when stored properly. Related articles How do I store the pellets? Can I refrigerate/freeze my pellets? What size should I order? How big are the boxes? How do I store my hay? Need a Replacement or Refund! Comments 0 comments Please sign in to leave a comment.