Will the Tightening Serum work on scars? Administrator August 30, 2017 20:22 The Instant Tightening and Restoring Serum can help smooth the appearance of indented scars. Related articles Instant Tightening & Restoring Serum Nourishing Night Cream Why is the Tightening Serum tube so small? Restoriix Do the Nutrifii products meet the WADA Prohibited List standards? Comments 0 comments Please sign in to leave a comment.