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It is also used in scalp-focused routines to support the look of fuller hair and a healthier scalp environment

It is specifically prepared for laboratory research applications, intended primarily as a solvent or diluent in controlled experimental settings

A separate 2025 narrative review by McGuire and colleagues asked a blunter question in its title: "Regeneration or Risk?" [2] Their conclusion: the preclinical evidence is consistently positive, but the absence of human data makes it impossible to generate evidence-based practice guidelines

This particularly affects users with thicker skin or compromised barrier function that reduces penetration efficiency