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Beyond collagen, GHK-Cus effects on the extracellular matrix extend to elastin (30% increase), decorin (302% increase at 1 nanomolar concentration), glycosaminoglycans, dermatan sulfate, and chondroitin sulfate

Reynolds and colleagues observed that patients with low serum folate levels undergoing treatment with various antidepressant drugs had poorer therapeutic outcomes (19, 30, 65)

Why Deficiency Matters Even mild deficiency can cause wide-ranging symptoms: Persistent fatigue or low energy Brain fog, mood changes, or poor concentration Tingling or numbness in hands and feet Pale skin or shortness of breath Reduced immune function These occur because B12 is critical for oxygen transport and nerve conduction

This organelle-centric vulnerability is further exacerbated by cigarette smoke, which perturbs inter-organelle communication and creates a pro-ferroptotic microenvironment