Biotin and VitaminC support keratin production and collagen formation for firmer, smoother skin
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Comparison with the Effects of GHRH, TRH and hCRH, Peptides, Volume 18, Issue 6, 1997, Pages 885-891, ISSN 0196-9781, Chihara K, Shimatsu A, Hizuka N, Tanaka T, Seino Y, Katofor Y
doi:10.1152/ajplung.00365.2006 Aw TY, Wierzbicka G, Jones DP (1991) Oral glutathione increases tissue glutathione in vivo
Skin firmness Skin elasticity was quantified with a Triplesense TR-3 sensor scan device (Schott Moritex Corporation, Saitama, Japan)