What is the source of the green stamp on the Optimal-V capsules? Administrator August 10, 2017 18:27 The green stamp is from chlorophyll. Chlorophyll is the green pigment found in plants and algae. Related articles Title Advancement Volume and Pins NuCerity Elite Optimals (Optimal-M + Optimal-V) Are the Optimals on PDR.net? Can I take the Optimals while taking the prescription medication Coumadin (Warfarin)? Comments 0 comments Please sign in to leave a comment.