The challenge of external influences on UV spectrophotometry, such as sample coloration, is mitigated by electrochemical methods, which rely on electrical signal changes and offer advantages in cost and speed via techniques such as cyclic voltammetry, differential pulse voltammetry, and square wave voltammetry
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While GHK-Cu is generally well-tolerated in topical research, certain contraindications or precautions should be considered, especially for systemic research or in specific populations: Systemic Research: For systemic applications, GHK-Cu is generally not recommended for subjects who are pregnant, breastfeeding, have active cancer, or suffer from Wilsons disease (a condition involving copper accumulation)