Nip+Fab has launched its affordable new Peptide Fix Finishing Oil to create radiant, pillow-like plump skin. Beauty Director and influencer Alex Steinherr shares her review and how to use it, plus how to get 15% off. Nip+Fab has launched its affordable new Peptide Fix Finishing Oil to create radiant, pillow-like plump skin. Beauty Director and influencer Alex Steinherr shares her review and how to use it, plus how to get 15% off.