I have used (and am using) several iSClinical products, including this one, and it's the best serum I've ever used. I have very sensitive skin (Psoriasis) and the serum goes on smooth, is absorbed immediately, and doesn't irritate my skin in any way. I started the iSClinical regimen as I'd heard great things about visible anti-aging results, especially about this serum. I haven't seen any miraculous reduction in fine lines, etc., yet, so the jury is still out on that score... but I'm continuing with it. Still searching for the "miracle" anti-aging product! :-)
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