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Evidence From Preclinical & Clinical Studies A) Skin permeation & bioavailability In-vitro penetration: A Franz-cell model showed human skin penetration of GHK-Cu in vitro, supporting the feasibility of topical delivery (PMC)

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Sourcing and Research Considerations For either compound, the variables that most affect reproducibility are the same: identity, purity, and handling

Following this, we recommend a maintenance B12 shot every 3-4 weeks to maintain B12 levels and support optimum wellness

However, it is contraindicated for those with certain health conditions and is far less effective for individuals with methylation impairments

Physician-guided supplementation may be considered to support the bodys antioxidant defenses but dosages and administration should be tailored to an individuals health history and goals, says Dr