Hypovitaminosis of vitamin C is defined as less than 23 mol/L, and deficiency as less than 11 } : CS1 maint: DOI inactive as of July 2025 (link) "Efficacy of topical vitamin C in melasma and photoaging: A systematic review"
A pro-collagen serum is formulated to support the skin's own collagen production - rather than adding collagen from an external source (which, in topical form, cannot penetrate the skin effectively)
Ethnobotany 5:3740 Aparna Rama Laxmi Devi M, YasoDeepika M, Nagaraju B, Prasad K (2015) Evaluation of nephroprotective activity of ethanolic extract of annona reticulata in gentamicin and cisplatin induced nephrotoxicity in rats
Research Applications GHK peptide as a natural modulator of multiple cellular path
Freo U, Brugnatelli V, Turco F, Zanette G
Fryer RH, Wilson BD, Gubler DB, Fitzgerald LA, and Rodgers GM (1993)