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Currently there is no established upper limit for B12 due to the low potential for toxicity
Long-term studies are needed to fully understand the sustained effects, particularly the specific role of B12 beyond its energy-boosting properties
Small animals + high concentration often produce tiny volumes
(1) In skin cell and hair follicle cell cultures Copper is a cofactor for key enzymes like lysyl oxidase (collagen/elastin crosslinking) and tyrosinase
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