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Inactive ingredients in both formulations: Vegetable glycerin, water, fructose, natural flavorings, potassium sorbate

Ping Zhou, [email protected] These authors have contributed equally to this work and share first authorship Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

The brain is protected by the blood-brain barrier (BBB)a dense layer of endothelial cells joined by tight junctions that prevents most circulating molecules from entering neural tissue

But with consistent use, a well-designed copper peptide serum can support a smoother, more refined skin appearance

Mild soreness or redness at the injection site may occur but usually subsides within hours.