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 Optimals (Optimal-M + Optimal-V) Why do I feel nauseated after taking the Optimals? Where does the coated trace mineral complex come from in the Optimal-M? Why is my urine bright yellow after taking the Optimals? Giving Greens Comments 0 comments Please sign in to leave a comment.