After washing, cells were counted and subjected to positive selection using CD11b MicroBeads (#130-049-601, Miltenyi Biotec)
Teruel-Andreu et al., 2021)
99% purity is essential for all melanocortin receptor pharmacology studies, comparative SAR research, pro-sexual behaviour paradigms, and melanogenesis biology , where impurities including the linear uncyclised peptide, partially oxidised species, or C-terminal amide hydrolysis product (PT-141) would show altered receptor subtype selectivity and confound mechanistic attribution
Under this framework, cosmetic products must not be presented as treating or preventing disease including hair loss as that would constitute a medicinal claim
Look for: HPLC purity reported as a percentage (target 98% or above), molecular weight confirmation near 340.38 g/mol by mass spec, appearance (blue to blue-green powder or solution), water content by Karl Fischer titration, residual solvents within USP limits, and a third-party lab name with a report date
Stick with evidencebased forms