Our BioLips Natural Serum is a natural produc... Our BioLips Natural Serum is a natural product, made out of 100% organic oils that uses an advanced formula in order to further stimulate the blood flow and hydrate in the same time. This is great to use after you used the lip plumper, in order to have fuller lips for more hours. A photo posted by BioLips (@biolips.official) on Jan 1, 2016 at 8:49am PST