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1, 2 IGF-1R is primarily activated by its high-affinity ligands, IGF-1 and IGF-2, though it can also bind insulin with lower affinity
Liposomal delivery uses a phospholipid bilayer to protect the nutrient and ensure it reaches your cells where it can actually do its work
For collagen, look for hydrolyzed peptides or a high-quality liquid formula that your body can easily recognize
What are peptides
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