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People with Digestive Issues Certain gut conditions can hinder B12 absorption, for example, Crohns disease and celiac disease

Some genetic studies reported an association between certain genetic variants and the deficiency of vitamin B 12 [77, 78]

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Mood Instability and Emotional Dysregulation: The restoration of neurotransmitter synthesis via the methylation cycle also directly impacts emotional well-being

- PMC, Human skin penetration of a copper tripeptide in vitro as a function of skin layer - PMC - NIH, Food-Derived TripeptideCopper Self-Healing Hydrogel for Infected Wound Healing - PMC, In Vitro and in Vivo Studies of pH-Sensitive GHK-Cu-Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer - PMC, Selected Biomarkers Revealed Potential Skin Toxicity Caused by ..., Selected Biomarkers Revealed Potential Skin Toxicity Caused by Certain Copper Compounds - PubMed,