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This YouTube video (presenter: Dr. Charles Mok) gives short skincare advice recommending daily morning use of a medical-grade vitamin C serum (the speaker names “radian C”) that contains multiple forms/isomers of vitamin C to slow oxidation and improve tissue penetration. The presenter says vitamin C protects collagen and elastin from sun-related damage (but does not prevent tanning) and notes an approximate half-life of about 36 hours, supporting daily morning application.
Questions this video answers
"radian C" (as spoken by the presenter).
Seven different forms/isomers.
About 36 hours.










