By what percentage do the active ingredients in Rejuvenator increase from Mild to Regular to Ultra? It doesn’t work that way. It’s not a percentage difference. However you could say if ultra is the max, medium is about half and mild is about a third of medium. Last Update: October 20, 2018 October 20, 2018 1790 FAQ’sRelated Knowledge Base Posts -Can you explain why Viktoria DeAnn peptide serums can’t be mixed before application?Would our peptides interfere with chemotherapy in any way?Can you use VDA peptides with a chemical peel treatment?