Can I take the Foundational Stack year round? Rudy Checo December 29, 2021 16:54 Updated Cycle Span Yes. It is designed to be the foundation of any additional Animal products you use. If you have further questions please reach out to our support staff at firstname.lastname@example.org or send a contact request here. Related articles What can I stack Animal Pak with? I'm not sure if my product is authentic, how do I verify it? What is the Foundation Stack? Can I take Animal Pak Powder and Animal Immune Pak Powder together? Do I need to run a PCT after running Animal Stak? Comments 0 comments Please sign in to leave a comment.