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Zinc and copper share common transport pathways, and increasing copper levels without adequate zinc can create functional deficiencies that impair immunity, wound healing, and hormone balance

doi: 10.1038/s41416-020-01156-1 55 SchiliroCFiresteinBL

Rigorous quality control involving testing of serum batches across multiple cell lines or experiments prior to purchasing a specific, well-performing large batch is often performed in industry but can remain burdensome from a labor and economic perspective for smaller academic labs

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