($185 in the shop). Stemulation’s latest product, Hi-Impact Serum, lives up to its name with a blend of epidermal growth factors, including sH-Oligopeptide-1, with vitamin C ester that boost collagen production. sH-oligopeptide-1 is a protein that binds to cell receptors to activate cellular proliferation, increase the rate of skin renewal, and slow down skin thinning. With regular use, my skin feels thicker, tighter and, as a bonus, gets a luminous glow.
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