For the face, one of my most popular serums is the Liquid Oxygen Therapy
Start with twice weekly evening application
PloS ONE 14, e0221016 10.1371/journal.pone.0221016 [DOI] [PMC free article] [PubMed] [Google Scholar] 121.Kruger P., Saffarzadeh M., Weber A.N.R., Rieber N., Radsak M.et al
It is a highly prized cosmetic ingredient, renowned in dermatology for its exceptional ability to stimulate skin renewal and combat tissue sagging
A volume of 2 l samples was injected into a Waters XBridge XP BEH Amide column (150 mm length 2.1 mm i.d., 2.5 m particle size) maintained at 25 C, with a Waters XBridge XP VanGuard BEH Amide (5 mm 2.1 mm i.d., 2.5 m particle size) guard column